The hemodynamic and electrophysiological action of the LEFT ATRIUM.
The hemodynamic and electrophysiological action of the HEART ATRIA.
The hemodynamic and electrophysiological action of the RIGHT ATRIUM.
The chambers of the heart, to which the BLOOD returns from the circulation.
Abnormal cardiac rhythm that is characterized by rapid, uncoordinated firing of electrical impulses in the upper chambers of the heart (HEART ATRIA). In such case, blood cannot be effectively pumped into the lower chambers of the heart (HEART VENTRICLES). It is caused by abnormal impulse generation.
Measurement of intracardiac blood flow using an M-mode and/or two-dimensional (2-D) echocardiogram while simultaneously recording the spectrum of the audible Doppler signal (e.g., velocity, direction, amplitude, intensity, timing) reflected from the moving column of red blood cells.
Echocardiography applying the Doppler effect, with velocity detection combined with range discrimination. Short bursts of ultrasound are transmitted at regular intervals and the echoes are demodulated as they return.
Surgical excision (total or partial) of a portion of the pericardium. Pericardiotomy refers to incision of the pericardium.
An electrical current applied to the HEART to terminate a disturbance of its rhythm, ARRHYTHMIAS, CARDIAC. (Stedman, 25th ed)
The hemodynamic and electrophysiological action of the left HEART VENTRICLE. Its measurement is an important aspect of the clinical evaluation of patients with heart disease to determine the effects of the disease on cardiac performance.
Contractile activity of the MYOCARDIUM.
Ultrasonic recording of the size, motion, and composition of the heart and surrounding tissues. The standard approach is transthoracic.
Examinations used to diagnose and treat heart conditions.
Ultrasonic recording of the size, motion, and composition of the heart and surrounding tissues using a transducer placed in the esophagus.
The hemodynamic and electrophysiological action of the HEART VENTRICLES.
The amount of BLOOD pumped out of the HEART per beat, not to be confused with cardiac output (volume/time). It is calculated as the difference between the end-diastolic volume and the end-systolic volume.
The failure by the observer to measure or identify a phenomenon accurately, which results in an error. Sources for this may be due to the observer's missing an abnormality, or to faulty technique resulting in incorrect test measurement, or to misinterpretation of the data. Two varieties are inter-observer variation (the amount observers vary from one another when reporting on the same material) and intra-observer variation (the amount one observer varies between observations when reporting more than once on the same material).
A value equal to the total volume flow divided by the cross-sectional area of the vascular bed.
The movement and the forces involved in the movement of the blood through the CARDIOVASCULAR SYSTEM.
A condition in which the LEFT VENTRICLE of the heart was functionally impaired. This condition usually leads to HEART FAILURE; MYOCARDIAL INFARCTION; and other cardiovascular complications. Diagnosis is made by measuring the diminished ejection fraction and a depressed level of motility of the left ventricular wall.
Enlargement of the LEFT VENTRICLE of the heart. This increase in ventricular mass is attributed to sustained abnormal pressure or volume loads and is a contributor to cardiovascular morbidity and mortality.
Echocardiography amplified by the addition of depth to the conventional two-dimensional ECHOCARDIOGRAPHY visualizing only the length and width of the heart. Three-dimensional ultrasound imaging was first described in 1961 but its application to echocardiography did not take place until 1974. (Mayo Clin Proc 1993;68:221-40)
A pathological constriction that can occur above (supravalvular stenosis), below (subvalvular stenosis), or at the AORTIC VALVE. It is characterized by restricted outflow from the LEFT VENTRICLE into the AORTA.
Use or insertion of a tubular device into a duct, blood vessel, hollow organ, or body cavity for injecting or withdrawing fluids for diagnostic or therapeutic purposes. It differs from INTUBATION in that the tube here is used to restore or maintain patency in obstructions.
The downward displacement of the cuspal or pointed end of the trileaflet AORTIC VALVE causing misalignment of the cusps. Severe valve distortion can cause leakage and allow the backflow of blood from the ASCENDING AORTA back into the LEFT VENTRICLE, leading to aortic regurgitation.
Pathological condition characterized by the backflow of blood from the ASCENDING AORTA back into the LEFT VENTRICLE, leading to regurgitation. It is caused by diseases of the AORTIC VALVE or its surrounding tissue (aortic root).
Compounds that inhibit HMG-CoA reductases. They have been shown to directly lower cholesterol synthesis.
Persistently high systemic arterial BLOOD PRESSURE. Based on multiple readings (BLOOD PRESSURE DETERMINATION), hypertension is currently defined as when SYSTOLIC PRESSURE is consistently greater than 140 mm Hg or when DIASTOLIC PRESSURE is consistently 90 mm Hg or more.
Method in which repeated blood pressure readings are made while the patient undergoes normal daily activities. It allows quantitative analysis of the high blood pressure load over time, can help distinguish between types of HYPERTENSION, and can assess the effectiveness of antihypertensive therapy.
Ear-shaped appendage of either atrium of the heart. (Dorland, 28th ed)
Obstruction of a blood vessel (embolism) by a blood clot (THROMBUS) in the blood stream.
Ultrasonography applying the Doppler effect, with the superposition of flow information as colors on a gray scale in a real-time image. This type of ultrasonography is well-suited to identifying the location of high-velocity flow (such as in a stenosis) or of mapping the extent of flow in a certain region.
Echocardiography applying the Doppler effect, with the superposition of flow information as colors on a gray scale in a real-time image.
A heterogeneous condition in which the heart is unable to pump out sufficient blood to meet the metabolic need of the body. Heart failure can be caused by structural defects, functional abnormalities (VENTRICULAR DYSFUNCTION), or a sudden overload beyond its capacity. Chronic heart failure is more common than acute heart failure which results from sudden insult to cardiac function, such as MYOCARDIAL INFARCTION.
Computer-based systems for use in personnel management in a facility, e.g., distribution of caregivers with relation to patient needs.
The hollow, muscular organ that maintains the circulation of the blood.
A voluntary organization concerned with the prevention and treatment of heart and vascular diseases.

Effects of pacing-induced and balloon coronary occlusion ischemia on left atrial function in patients with coronary artery disease. (1/343)

OBJECTIVES: The aim of this study was to compare left atrial (LA) function in 16 patients with distal left anterior descending (LAD) and in 16 patients with proximal left circumflex (LCx) coronary artery stenosis at rest and immediately after pacing-induced tachycardia (LAD-pacing [P] and LCx-P) or coronary occlusion (LAD-CO and LCx-CO). BACKGROUND: During left ventricular (LV) ischemia, compensatory augmentation of LA contraction enhances LV filling and performance. The left atrium is supplied predominantly by branches arising from the LCx. Therefore, we hypothesized that one mechanism for the loss of atrial contraction may be ischemic LA dysfunction. METHODS: Left ventricular and LA pressure-area relations were derived from simultaneous double-tip micromanometer pressure recordings and automatic boundary detection echocardiograms. RESULTS: Immediately after pacing or after coronary occlusion, LV end-diastolic pressure, LV relaxation, LA mean pressure and LV stiffness significantly increased in all patients. However, the area of the A loop of the LA pressure-area relation, representing the LA pump function, significantly decreased in groups LCx-P and LCx-CO (from 14+/-3 to 9+/-2, and from 16+/-4 to 9+/-2 mm Hg.cm2, respectively, p < 0.05), whereas it increased in groups LAD-P and LAD-CO (from 12+/-3 to 54+/-10, and from 16+/-3 to 49+/-8 mm Hg.cm2, respectively, p < 0.001). CONCLUSIONS: In patients with LAD stenosis, LV supply or demand ischemia is associated with enhanced LA pump function. However, in patients with proximal LCx stenosis who develop the same type and degree of ischemia, LA branches might have been affected, rendering the LA ischemic and unable to increase its booster pump function.  (+info)

Pulmonary venous flow in hypertrophic cardiomyopathy as assessed by the transoesophageal approach. The additive value of pulmonary venous flow and left atrial size variables in estimating the mitral inflow pattern in hypertrophic cardiomyopathy. (2/343)

AIMS: This study was conducted to assess the characteristics of the pattern of pulmonary venous flow and to document the interaction of this flow and left atrial function with the pattern of mitral inflow in hypertrophic cardiomyopathy. METHODS AND RESULTS: Pulmonary venous and mitral flows were evaluated by the transoesophageal approach in 80 patients with hypertrophic cardiomyopathy. Left atrial size and function were measured by the transthoracic approach. Their values were compared with those obtained from 35 normal controls. Twelve patients showed significant (> 2+) mitral regurgitation. As a group, hypertrophic cardiomyopathy patients showed increased atrial reversal flow and longer deceleration time of the diastolic wave, but a wide variability of pulmonary venous flow patterns were observed. Thirty patients (37.5%) had pseudonormal mitral flow patterns. Stepwise multilinear regression analysis identified the ratio of systolic to diastolic pulmonary venous flow velocity, the ratio of velocity-time integrals of both flow waves at atrial contraction, the left atrial minimal volume and the systolic fraction as independent predictive variables of the mitral E/A wave velocity ratio (r = 0.82). By logistic regression, the former three variables were selected as independent predictive covariates of a pseudonormal mitral flow pattern (sensitivity: 83%, specificity: 90%). The ratio of velocity-time integrals of both atrial waves was the most important predictive variable in both analyses. CONCLUSIONS: The observed variability in the configuration of pulmonary venous flow velocity waveform is related to what occurs in transmitral flow in patients with hypertrophic cardiomyopathy. Significant mitral regurgitation is not an independent correlate of pseudonormal mitral inflow patterns in these patients. Our results further emphasize the complementary, additive value of the pulmonary venous flow velocity pattern and left atrial size in the interpretation of the mitral flow velocity pattern, and indirectly suggest the underlying increased left ventricular filling pressures of patients with hypertrophic cardiomyopathy and pseudonormal mitral flow patterns.  (+info)

Doppler sonographic evaluation of left atrial function after cardioversion of atrial fibrillation. (3/343)

Restoration of sinus rhythm is not always followed by immediate return of effective atrial contraction. Left atrial mechanical function can be assessed by Doppler echocardiography; in the present study we measured the atrial ejection force, which is a noninvasive Doppler-derived parameter that measures the strength of atrial contraction. The aim of the present study was to evaluate the influence of clinical and echocardiographic parameters: duration and cause of atrial fibrillation, different modality of cardioversion, and left atrial size with respect to the delay in the return of effective atrial contraction after cardioversion. Seventy patients were randomly chosen to undergo cardioversion by either direct current shock or intravenously administered procainamide hydrochloride. The 52 patients who had sinus rhythm restored underwent a complete Doppler echocardiographic examination 1 h after the restoration of sinus rhythm and after 1 day, 7 days, and 1 month. The relation between clinical variables and atrial ejection force was tested. Atrial ejection force was greater immediately and 24 h after cardioversion in patients who underwent pharmacologic therapy compared to patients treated with direct current shock (11.3+/-3 versus 5+/-2.9 dynes; P<0.001). In both groups atrial ejection force increased over time. The mode of cardioversion was significantly associated with recovery of left atrial mechanical function by day 1 in univariate and multivariate analysis (odds ratio, 0.14; 95% confidence interval, 0.02-1.2). The other variable associated with the delay in the recovery of atrial function was a dilated left atrium (odds ratio, 0.16; 95% confidence interval, 0.12-1.6). Atrial ejection force is a noninvasive parameter that can be easily measured after cardioversion and gives accurate information about the recovery of left atrial mechanical function. The recovery of left atrial function was influenced by the mode of cardioversion and left atrial size.  (+info)

Importance of left atrial appendage flow as a predictor of thromboembolic events in patients with atrial fibrillation. (4/343)

AIM: The purpose of this study was to investigate the role of transoesophageal echocardiography in predicting subsequent thromboembolic events in patients with atrial fibrillation. METHODS AND PATIENTS: Transoesophageal echocardiography was performed in 88 patients with documented paroxysmal (n=53) or chronic atrial fibrillation (n=35) to assess morphological and functional predictors of thromboembolic events. Prospective selection was from patients with non-valvular atrial fibrillation who had undergone transoesophageal echocardiography because of previous thromboembolism (n=30); prior to electrical cardioversion (n=31); or for other reasons (n=27). All patients were followed up for 1 year. RESULTS: During the period of follow-up new thromboembolic events occurred in 18 of 88 patients (20%/year); 16 of these patients had a stroke and two a peripheral embolism. Univariate analysis revealed that previous thromboembolism (P<0.005; odds ratio 5.3 [CI 1.9, 12. 1]), history of hypertension (P<0.01; odds ratio 4.0 [CI 1.4, 10.4), presence of left atrial spontaneous echo contrast (P<0.025; odds ratio 3.5 [CI 1.2, 10.0]), and presence of left atrial appendage peak velocity +info)

Short-term effect of atrial fibrillation on atrial contractile function in humans. (5/343)

BACKGROUND: Conversion of chronic atrial fibrillation (AF) is associated with atrial stunning, but the short-term effect of a brief episode of AF on left atrial appendage (LAA) emptying velocity is unknown. The purpose of this study was to determine whether a short episode of AF affects left atrial function and whether verapamil modifies this effect. METHODS AND RESULTS: The subjects of this study were 19 patients without structural heart disease undergoing an electrophysiology procedure. In 13 patients, LAA emptying velocity was measured by transesophageal echocardiography in the setting of pharmacological autonomic blockade before, during, and after a short episode of AF. During sinus rhythm, the baseline LAA emptying velocity was measured 5 times and averaged. AF was then induced by rapid right atrial pacing. After either spontaneous or electrical conversion, LAA emptying velocity was measured immediately on resumption of sinus rhythm and every minute thereafter. The mean duration of AF was 15.3+/-3.8 minutes. The mean baseline emptying velocity was 70+/-20 cm/s. The first post-AF emptying velocity was 63+/-20 cm/s (P=0.02 versus baseline emptying velocity). The post-AF emptying velocity returned to the baseline emptying velocity value after 3.0 minutes. The mean percent reduction in post-AF emptying velocity was 9.7+/-21% (range, 15% increase to 56% decrease). A second group of 6 patients were pretreated with verapamil (0.1-mg/kg IV bolus followed by an infusion of 0.005 mg. kg-1. min-1). In these patients, the first post-AF emptying velocity, 58+/-14 cm/s, was not significantly different from the pre-AF emptying velocity, 60+/-13 cm/s (P=0.08). CONCLUSIONS: In humans, several minutes of AF may be sufficient to induce atrial contractile dysfunction after cardioversion. When atrial contractile dysfunction occurs, there is recovery of AF within several minutes. AF-induced contractile dysfunction is attenuated by verapamil and may be at least partially mediated by cellular calcium overload.  (+info)

Left atrial relaxation and left ventricular systolic function determine left atrial reservoir function. (6/343)

BACKGROUND: Determinants of left atrial (LA) reservoir function and its influence on left ventricular (LV) function have not been quantified. METHODS AND RESULTS: In an open-pericardium, paced (70 and 90 bpm) pig model of LV regional ischemia (left anterior descending coronary constriction), with high-fidelity LV, LA, and RV pressure recordings, we obtained the LA area with 2D automated border detection echocardiography, LA pressure-area loops, and Doppler transmitral flow. We calculated LV tau, LA relaxation (a-x pressure difference divided by time, normalized by a pressure), and stiffness (slope between x and v pressure points of v loop). Determinants of total LA reservoir (maximum-minimum area, cm(2)) were identified by multiple regression analysis. Different mean rates of LA area increase identified 2 consecutive (early rapid and late slow) reservoir phases. During ischemia, LV long-axis shortening (LAS, LV base systolic descent) and LA reservoir area change decreased (7.3+/-0.3 [SEM] versus 5.6+/-0.3 cm(2), P<0.001) and LA stiffness increased (1.6+/-0.3 versus 3.1+/-0.3 mm Hg/cm(2), P=0.009). Early reservoir area change depended on LA mean ejection rate (LA area at ECG P wave minus minimum area divided by time; multiple regression coefficient=0.9; P<0.001) and relaxation (coefficient=4.9 cm(2)xms/s; P<0.001). Late reservoir area change depended on LAS (coefficient=8 cm/s; P<0.001). Total reservoir filling depended on LA stiffness (coefficient=-0.31 cm(4)/mm Hg; P=0. 001) and cardiac output (coefficient=0.001 cm(2)xmin/L; P=0.002). The strongest predictor of cardiac output was LA reservoir filling (coefficient=301 L/minxcm(2); P<0.001). The v loop area was determined by cardiac output, LV ejection time, tau, and early transmitral flow. CONCLUSIONS: Two (early and late) reservoir phases are determined by LA contraction and relaxation and LV base descent. Acute LV regional ischemia increases LA stiffness and impairs LA reservoir function by reducing LV base descent.  (+info)

Noninvasive assessment of left atrial maximum dP/dt by a combination of transmitral and pulmonary venous flow. (7/343)

OBJECTIVES: The study assessed whether hemodynamic parameters of left atrial (LA) systolic function could be estimated noninvasively using Doppler echocardiography. BACKGROUND: Left atrial systolic function is an important aspect of cardiac function. Doppler echocardiography can measure changes in LA volume, but has not been shown to relate to hemodynamic parameters such as the maximal value of the first derivative of the pressure (LA dP/dt(max)). METHODS: Eighteen patients in sinus rhythm were studied immediately before and after open heart surgery using simultaneous LA pressure measurements and intraoperative transesophageal echocardiography. Left atrial pressure was measured with a micromanometer catheter, and LA dP/dt(max) during atrial contraction was obtained. Transmitral and pulmonary venous flow were recorded by pulsed Doppler echocardiography. Peak velocity, and mean acceleration and deceleration, and the time-velocity integral of each flow during atrial contraction was measured. The initial eight patients served as the study group to derive a multilinear regression equation to estimate LA dP/dt(max) from Doppler parameters, and the latter 10 patients served as the test group to validate the equation. A previously validated numeric model was used to confirm these results. RESULTS: In the study group, LA dP/dt(max) showed a linear relation with LA pressure before atrial contraction (r = 0.80, p < 0.005), confirming the presence of the Frank-Starling mechanism in the LA. Among transmitral flow parameters, mean acceleration showed the strongest correlation with LA dP/dt(max) (r = 0.78, p < 0.001). Among pulmonary venous flow parameters, no single parameter was sufficient to estimate LA dP/dt(max) with an r2 > 0.30. By stepwise and multiple linear regression analysis, LA dP/dt(max) was best described as follows: LA dP/dt(max) = 0.1 M-AC +/- 1.8 P-V - 4.1; r = 0.88, p < 0.0001, where M-AC is the mean acceleration of transmitral flow and P-V is the peak velocity of pulmonary venous flow during atrial contraction. This equation was tested in the latter 10 patients of the test group. Predicted and measured LA dP/dt(max) correlated well (r = 0.90, p < 0.0001). Numerical simulation verified that this relationship held across a wide range of atrial elastance, ventricular relaxation and systolic function, with LA dP/dt(max) predicted by the above equation with r = 0.94. CONCLUSIONS: A combination of transmitral and pulmonary venous flow parameters can provide a hemodynamic assessment of LA systolic function.  (+info)

The pulmonary venous systolic flow pulse--its origin and relationship to left atrial pressure. (8/343)

OBJECTIVES: The purpose of this study was to determine the origin of the pulmonary venous systolic flow pulse using wave-intensity analysis to separate forward- and backward-going waves. BACKGROUND: The mechanism of the pulmonary venous systolic flow pulse is unclear and could be a "suction effect" due to a fall in atrial pressure (backward-going wave) or a "pushing effect" due to forward-propagation of right ventricular (RV) pressure (forward-going wave). METHODS: In eight patients during coronary surgery, pulmonary venous flow (flow probe), velocity (microsensor) and pressure (micromanometer) were recorded. We calculated wave intensity (dP x dU) as change in pulmonary venous pressure (dP) times change in velocity (dU) at 5 ms intervals. When dP x dU > 0 there is a net forward-going wave and when dP x dU < 0 there is a net backward-going wave. RESULTS: Systolic pulmonary venous flow was biphasic. When flow accelerated in early systole (S1), pulmonary venous pressure was falling, and, therefore, dP x dU was negative, -0.6 +/- 0.2 (x +/- SE) W/m2, indicating a net backward-going wave. When flow accelerated in late systole (S2), pressure was rising, and, therefore, dP x dU was positive, 0.3 +/- 0.1 W/m2, indicating a net forward-going wave. CONCLUSIONS: Pulmonary venous flow acceleration in S1 was attributed to a net backward-going wave secondary to a fall in atrial pressure. However, flow acceleration in S2 was attributed to a net forward-going wave, consistent with propagation of the RV systolic pressure pulse across the lungs. Pulmonary vein systolic flow pattern, therefore, appears to be determined by right- as well as left-sided cardiac events.  (+info)

Effects of Renin-Angiotensin System Inhibition on Left Atrial Function of Hypertensive Patients: An Echocardiographic Tissue Deformation Imaging ...
title: Left atrial function assessed with Doppler echocardiography rather than left atrial volume predicts recurrence in patients with paroxysmal atrial fibrillation, doi: none, category: Thesis
TY - JOUR. T1 - Associations of electrocardiographic P-wave characteristics with left atrial function, and diffuse left ventricular fibrosis defined by cardiac magnetic resonance. T2 - The PRIMERI study. AU - Win, Theingi Tiffany. AU - Venkatesh, Bharath Ambale. AU - Volpe, Gustavo J.. AU - Mewton, Nathan. AU - Rizzi, Patricia. AU - Sharma, Ravi K.. AU - Strauss, David G.. AU - Lima, Joao A.. AU - Tereshchenko, Larisa G.. PY - 2015/1/1. Y1 - 2015/1/1. N2 - BACKGROUND: Abnormal P-terminal force in lead V1 (PTFV1) is associated with an increased risk of heart failure, stroke, atrial fibrillation, and death. OBJECTIVE: Our goal was to explore associations of left ventricular (LV) diffuse fibrosis with left atrial (LA) function and electrocardiographic (ECG) measures of LA electrical activity. METHODS: Patients without atrial fibrillation (n = 91; mean age 59.5 years; 61.5% men; 65.9% white) with structural heart disease (spatial QRS-T angle ≥105° and/or Selvester QRS score ≥5 on ECG) but LV ...
To obtain normal values for left atrial function noninvasively, volumes of the left atrium and ventricle were calculated in 52 volunteers by 2-dimensional echocardiography. A light pen digitizing and computation system, controlled by a microprocessor
Background: Left atrial (LA) function by volume and strain analysis in children has been little studied. LA dysfunction related to aortic stenosis has been reported in adults.. Hypotheses: 1. LA volume and strain analysis is feasible and reproducible in normal children.. 2. Children with isolated congenital aortic stenosis (AS) as compared to matched controls have higher maximal LA volume (LAV) and lower total longitudinal LA strain.. Methods: Retrospective chart review and offline analysis of 2D echocardiogram images for phasic LAVs, volume indices, and longitudinal LA strain (Fig 1) by speckle tracking (TomTec software) in: 1. Healthy children with a normal echocardiogram; and, 2. Children ≥1 years of age with significant (≥ moderate) isolated AS. AS cases were compared with age, gender and BSA-matched normal controls.. Results: There were 67 normal subjects [age: 10.5 (1.3-22.1) yrs; 50 males, 17 females; BSA 1.22 (0.44-2.39) m2] studied. No significant inter-observer and intra-observer ...
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Download PDF D. Caivano¹, V. Patata¹, F. Birettoni¹, M.E. Giorgi¹, M. Rishniw², F. Porciello¹ ¹University of Perugia, Perugia, Italy ²Veterinary Information Network, Davis, United States of America
We read with great interest the paper by Carluccio et al. (1) regarding the impact of left ventricular (LV) remodeling on the response to cardiac resynchronization therapy (CRT). In this elegant study, the authors performed a comprehensive assessment of LV function, showing that extensive LV remodeling at baseline is associated with poor improvement after CRT.. We wish to raise an essential issue, which may be of keen interest to the readers.. In recent years, there has been growing interest in the potential impact of CRT on atrial function, but the state of knowledge in this field is still controversial and unsettled (2-4). In the paper by Carluccio et al. (1) several baseline data concerning atrial function are presented (left atrial volume index and mitral regurgitation severity), but unfortunately there is no information related to CRT response. We believe that their excellent echocardiographic data could also be useful to better understand another debated issue (i.e., the effect of CRT on ...
Appleton C, Galloway J, Gonzalez M et al. Estimation of left ventricular filling pressures using two-dimensional and Doppler echocardiography in adult patients with cardiac disease: additional value of analyzing left atrial ejection fraction and the difference in duration of pulmonary venous and mitral flow velocity at atrial contraction. J Am Coll Cardiol. 1993; 22 (7):1972-1982 ...
5 Stage RO+UV+Booster Pump (Clear Housings) - Without Tank - *******This Product has been******* *****customized/built in the USA***** 5 Stage Reverse Osmosis + Ultraviolet System + Booster Pump ...
Hall, Cynthia Ann, The role of left atrial chamber size as assessed by echocardiography in determining thromboembolic complications of atrial fibrillation (1986). Yale Medicine Thesis Digital Library. 2684 ...
We sought to evaluate the relationship between plasma cytokine levels (sCD14, tumor necrosis factor [TNF]-alpha, and interleukin [IL]-6) and tissue Doppler derived indices of left ventricular systolic and diastolic function in patients with newly diagnosed heart failure. We enrolled 101 consecutive patients (mean age 65+/-13 years) with newly diagnosed heart failure who were hospitalized in our institute. Echocardiographic assessment was performed in all patients during the third day of their initial hospitalization. The pulsed tissue Doppler imaging (TDI) of the systolic and diastolic function of mitral annulus was characterized by the systolic wave Smv, and the diastolic waves: Emv and Amv. Left atrial kinetic energy (LAKE), an index of left atrial function, was calculated using the equation 1/2 x LASV x 1.06 x Amv(2); where LASV is left atrial systolic volume. Furthermore the ratio E/Emv and the flow propagation velocity were also calculated; where E is the rapid mitral filling wave, detected ...
In patients with MS, several studies have demonstrated that LA enlargement is a marker of increased thromboembolic risk (4,6,7,9,11,25,26). However, the great majority of studies considered LA size or volume as an indicator of risk. This study aimed to look specifically at LA shape and not just LAVs and LA function in predicting stroke. As LA dilation may not occur in a uniform fashion, LA shape might be a better measure of the pattern of LA remodeling and a better predictor of embolic risk than absolute LAV.. The results of this study show that the atrial shape adds incremental value in predicting embolic events. Additionally, in agreement with a recently published study (27), we found that LA reservoir function was also associated with an increased risk for ECE. Although the LA has 3 major roles that affect LV filling, its reservoir function represents the most important component of the LA function in MS. LA contractile force cannot overcome the mechanical obstruction across the valve and ...
TY - JOUR. T1 - Antegrade late diastolic arterial blood flow in the fetus. T2 - Insight into fetal atrial function. AU - Howley, Lisa W.. AU - Yamamoto, Yuka. AU - Sonesson, Sven Erik. AU - Sekar, Priya. AU - Jain, Venu. AU - Motan, Tarek. AU - Savard, Winnie. AU - Wagner, Brandie D.. AU - Trines, Jean. AU - Hornberger, Lisa K.. PY - 2013/6. Y1 - 2013/6. N2 - Objective: The purpose of this study was to examine the presence and frequency of antegrade late diastolic arterial blood flow (ALDAF) in the fetus and to determine its contribution to cardiac output. Study Design: We evaluated the presence of ALDAF in 457 fetal and 21 postnatal echocardiograms. The timing of ALDAF to the ventricular systolic Doppler recording (ALDAF-V) was compared with the mechanical atrioventricular interval and, in neonates, the electrical PR interval. Velocity time integrals of ALDAF and the ventricular systolic Doppler signals were measured, and the percent contribution of ALDAF was calculated. Results: ALDAF was ...
Le spillover de noradrénaline dans les régions vasculaires des muscles squelettiques augmente à lexercice. Les mécanismes causant cette augmentation ne sont pas bien connus. La contraction musculaire provoque plusieurs modifications qui pourraient influencer ce spillover. Par exemple, la bradykinine est formée lors de la contraction musculaire. Comme les récepteurs B2 à la bradykinine facilitent le spillover de noradrénaline, celle-ci pourrait être impliquée dans laugmentation observée à lexercice. Nous avons étudié leffet de la bradykinine sur le spillover de noradrénaline lors de la contraction musculaire en utilisant un antagoniste spécifique des récepteurs B2, le HOE 140 (HOE), dans le muscle gracilis in situ chez le Chien. Le HOE na eu aucun effet sur le spillover de noradrénaline au repos mais a causé une baisse significative lors de la contraction, de 558 à 181 pg·min-1. Une baisse du pourcentage dextraction de la noradrénaline a été observée lors de la ...
Background Atrial stretch is considered to are likely involved in the introduction of atrial fibrillation (AF). on the LA appendage area in 24 from the 40 sufferers (60%) with Rabbit polyclonal to ABCG5. persistent AF (p=0.0006). In multivariate evaluation LA pressure was the just unbiased predictor of DFmax in the LA appendage (p=0.04 OR 1.41 95 CI 1.02 to at least one 1.94). Conclusions Higher LA pressure in sufferers with consistent AF means that these sufferers are more susceptible to stretch-related remodeling than patients with paroxysmal AF. The DF of IKK-2 inhibitor VIII AF was directly related to LA pressure in patients with persistent AF. This suggests that atrial stretch may contribute to the maintenance of AF in humans by stabilizing high frequency sources. AF was defined as the time IKK-2 inhibitor VIII period extending from the date of recurrence to the date of the ablation procedure. Patients with paroxysmal AF4 who presented to the laboratory in AF served as a comparison group ...
Mesure de la tension musculaire cardiaque : La contraction du pilier du cœur et des muscles ventriculaires découle dune dépolarisation transitoire des myocytes dans le cœur (potentiel daction). Non seulement la modification du potentiel daction du cœur a-t-elle une incidence sur lélectrophysiologie de lorgane, mais aussi sur ses propriétés mécaniques. Grâce aux paramètres de la contraction et de la relaxation comme un phénomène intégré, il est possible de mesurer la durée du cycle de contraction-repolarisation dans les tissus cardiaques pour connaître les effets du produit à létude sur le transport électrogénique (courants ioniques) et la structure protéique de la contraction.. Mesure de la tension vasculaire : Les changements dans la tension artérielle découlent des variations de lélasticité et de la tension dans larbre artériel. Ces changements sont assujettis à des facteurs exogènes et endogènes qui affinent la contractilité des tissus. Grâce aux ...
Abnormal left atrial (LA) function is a marker of cardiac dysfunction and adverse cardiovascular outcome, but is difficult to assess, and hence not, routinely quantified. We aimed to determine the feasibility and effectiveness of a fast method to measure long-axis LA strain and strain rate (SR) with standard cardiovascular magnetic resonance (CMR) compared to conventional feature tracking (FT) derived longitudinal strain. We studied 50 normal controls, 30 patients with hypertrophic cardiomyopathy, and 100 heart failure (HF) patients, including 40 with reduced ejection fraction (HFrEF), 30 mid-range ejection fraction (HFmrEF) and 30 preserved ejection fraction (HFpEF). LA longitudinal strain and SR parameters were derived by tracking the distance between the left atrioventricular junction and a user-defined point at the mid posterior LA wall on standard cine CMR two- and four-chamber views. LA performance was analyzed at three distinct cardiac phases: reservoir function (reservoir strain εs and strain
A short A2-OS interval and long mitral diastolic murmur indicate severe MS. A good chest x-ray provides information about elevated LA pressures; pulmonary congestion occurs with an LA pressure ≥18 mm Hg, interstitial edema with an LA pressure ≥25 mm Hg, and alveolar edema with LA pressure ≥35 mm Hg. Signs of PA hypertension (loud P2, right ventricular hypertrophy) in absence of another cause indicate severe MS.. A comprehensive echocardiographic Doppler study is important. MVA by Doppler half-time, when MR/aortic regurgitation (AR) are absent or trivial, is reasonably reproducible. It is essential that mitral valve morphology using a scoring system [Massachusetts General Hospital [MGH] 1 to 16; USC 0 to 4],3 or the French,4 presence of LA thrombus, and assessment of MR and its severity are carefully evaluated. Transesophageal echocardiography is important if the patient is a candidate for CBC or surgical valve repair.. Cardiac catheterization and angiography are essential in many patients. ...
Introduction: The pathophysiology of ischemia involves the cellular effect of myocardial ischemia, reactive oxygen species, and reactive inflammatory enzymes. Left atrial (LA) ischemia has been shown to have several mechanisms through which it can lead to abnormalities in left ventricular filling in early diastole and thus reduces LA passive functional reserve. In this review, we evaluated the physiological mechanisms of LA during myocardial ischemia, as previously demonstrated in experimental and clinical studies.Methods: Several databases were searched in order to find related articles. The outcome of interest included LA function measurements (measurement of LA volume) during ischemia. By applying a standardized protocol, reviewers independently extracted and assessed the studies.Results: The literature review indicated 50 publications, among which 15 studies were eligible for analysis. Assessment of LA dimension and function is essential for clinical evaluation and prognostic purposes. ...
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Objective To evaluate the predictive value of left atrial appendage (LAA) function in success of electrial cardioversion (ECV) in patients with nonvalvular atrial fibrillation (NVAF), and observe the course of the recovery of LAA systaltic function Methods To test blood flow wave patterns, peak emptying velocity (PEV) of LAA and left atrial spontaneous echo contrast (SEC) of left atrial appendage before ECV and after ECV 24 hours, 3 days and 1 week in 60 patients with NVAF by using transesophageal echocardiography (TEE) Results (1) Patients with LAAPEV20 cm/s had a ECV success rate of 75%, in contrast, LAAPEV20 cm/s had that of 30% (2) LAA blood flow wave patterns converted to a organized contraction patterns LAAPEV (2310 cm/s) was lower than that (3010 cm/s) before ECV (P0001); SEC could be generated in 8 patients, intensified in 11 patients Conclusion LAA mechanical activity prior to ECV is highly
TY - JOUR. T1 - Effect of radiofrequency ablation on atrial mechanical function in patients with atrial flutter. AU - Welch, Patrick J.. AU - Afridi, Imran. AU - Joglar, Jose A.. AU - Sheehan, Clifford J.. AU - Zagrodzky, Jason D.. AU - Abraham, Theodore P.. AU - Page, Richard L.. AU - Hamdan, Mohamed H.. PY - 1999/8/15. Y1 - 1999/8/15. N2 - Atrial stunning, as assessed by left atrial appendage emptying and increased spontaneous echo contrast, is known to occur following direct- current cardioversion of atrial fibrillation (AF) and atrial flutter (AFI). Little is known on atrial mechanical function and the time course of atrial recovery following radiofrequency ablation of AFI. Fourteen patients undergoing radiofrequency ablation of persistent typical counterclockwise AFI were enrolled. Two-dimensional and pulse Doppler transesophageal echocardiography (TEE) were performed before ablation and immediately following restoration of sinus rhythm. Left atrial spontaneous echo contrast grades, left ...
Objective: To compare the value of current harmonic transthoracic and transesophageal echocardiography for assessing echocardiographic markers of thromboembolic risk and identify left atrial thrombi in patients with atrial fibrillation and atrial flutter prior to cardioversion and/or overdrive stimulation. Transesophageal echocardiography has been suggested for guiding cardioversion in patients with atrial fibrillation and atrial flutter, because of its high accuracy for identifying left atrial thrombi. More recent studies have demonstrated that harmonic echocardiography may allow transthoracic detection of left atrial thrombi and assessment of left atrial appendage function. Setting: Tertiary cardiac referral centre. 172 Patients with atrial fibrillation and/or atrial flutter who were scheduled for cardioversion and/or overdrive stimulation were examined both by harmonic transthoracic and multiplane transesophageal echocardiography by independent observers to assess left atrial chamber and ...
We analyzed the reports of 1,288 consecutive transesophageal echocardiograms (TEE) performed between the years 1993 through 1997. All TEE were performed using Omniplane 5 MHz probes on Hewlett Packard Sonos 1000 echocardiographs, according to recognized guidelines (16). Echocardiograms with SEC were selected and reviewed. Patients with swirling SEC in the LA who were in NSR during TEE were chosen for analysis. Patients in AF or flutter at the time of TEE were excluded from this study. Left atrial SEC was diagnosed by the presence of swirling dynamic smoke-like echoes within the atrial cavity that was distinct from white noise artifact. The presence and severity of SEC were determined independently by two different echocardiographers, and any discrepancy was resolved by consensus. Spontaneous echo contrast was graded as 0 = no smoke, 1+ = mild smoke visible in some portion of the LA, 2+ = dense smoke that appeared throughout the LA. The presence of LA thrombus, diagnosed as a clearly defined ...
Objectives. This study was conducted to determine the implications of negative findings on a transesophageal echocardiographic study in which neither a vegetation nor an abscess is identified in patients with clinically suspected infective endocarditis.. Background. Echocardiography is the procedure of choice for evaluating suspected infective endocarditis in patients. Transesophageal echocardiography has been shown to be superior to transthoracic imaging. Although the importance of positive results or a diagnostic study is known, the significance of negative findings on a transesophageal study is not clear.. Methods. All transesophageal echocardlographic studies performed over a 2-year period for suspected infective endocarditis were reviewed and the clinical course of patients with an initially negative study result was assessed to determine their final diagnosis. Results. Of the 105 patients identified. 65 bad a negative transesophageal study result. In the majority of this group (56 of 65), ...
Nova Reverse Osmosis booster pump, to 90psi with transformer, 24 volt dc, inlet pressure 30psi, we use these on all our Reverse Osmosis units they are very quite running, higher pressure results in lower TDS results. ...
TY - JOUR. T1 - Mechanical function of the left atrium is improved with epicardial ligation of the left atrial appendage. T2 - Insights from the LAFIT-LARIAT Registry. AU - Dar, Tawseef. AU - Afzal, Muhammad R.. AU - Yarlagadda, Bharath. AU - Kutty, Shelby. AU - Shang, Quanliang. AU - Gunda, Sampath. AU - Samanta, Anweshan. AU - Thummaluru, Jahnavi. AU - Arukala, Kedareeshwar S.. AU - Kanmanthareddy, Arun. AU - Reddy, Madhu. AU - Atkins, Donita. AU - Bommana, Sudharani. AU - Dawn, Buddhadeb. AU - Lakkireddy, Dhanunjaya. PY - 2018/7. Y1 - 2018/7. N2 - Background: Left atrial (LA) strain (ε) and ε rate (SR) analysis by 2-dimensional speckle tracking echocardiography is a novel method for functional assessment of the LA. Objective: The purpose of this study was to determine the impact of left atrial appendage (LAA) exclusion by Lariat epicardial ligation on mechanical function of the LA by performing ε and SR analysis before and after the procedure. Methods: A total of 66 patients who underwent ...
Dalwallinu workers will begin work this month to update the towns water infrastructure by building a new, larger water tank to improve the towns water supply.. Around 24 Western Australian workers will be involved in the $8.8 million project, including 11 local sub-contractors. The project will increase Water Corporations capacity to store water and provide a more consistent water pressure to around 350 properties in the town. Works will include the construction of a new concrete water storage tank, two new booster pump stations and 2.2 kilometres of underground pipework connecting the new tank to the scheme.. The new tank and a booster pump will be constructed on Water Corporation land in Dalwallinu, opposite Strickland Drive, near Mclevie Way. The new underground pipeline will be laid along Leahy Street, Strickland Drive, Great Northern Highway and Watheroo Road.. The second booster pump station will be constructed at the Water Corporations existing Pithara site, approximately 20 km from ...
Purpose: The evolution of ARVC is more diffuse right ventricle (RV) involvement and, sometimes, left ventricular(LV) abnormalities, that may result in heart failure. We evaluated the potential utility of two-dimensional (2D) Strain-Strain rate (S-SR) and 3D echocardiography to quantitatively assess
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Aim of this study was to evaluate the role of atrial performance after acute myocardial infarction (AMI). Cardiovascular disease is the leading cause of mortality worldwide, whereas the role of atrial function following acute myocardial infarction remains controversial. Based on the two prospective multi-centre studies AIDA (Abciximab Intracoronary versus intravenously Drug Application in STEMI) und TATORT; Thrombus Aspiration in Thrombus Containing Culprit Lesions in Non-ST-Elevation) in the survey period between 2008 and 2013, this project aimed to assess atrial function of the study participiants in a secondary analysis. The study includes 1235 study participants with ST-Segment-elevation AMI (n=795) and 440 Non-ST-Segment-Elevation AMI-study participants, which initially underwent primary percutaneous coronary intervention. Different therapeutic strategies had been evaluated, intracoronary vs intravenously application of Abciximab respectively thrombus aspiration in comparison to standard ...
Echocardiographic left atrial (LA) strain parameters have been associated with atrial fibrillation (AF) in prior studies. Our goal was to determine if strain measures [peak systolic longitudinal strain (LAS) and stiffness index (LASt)] changed after cardioversion (CV); and their relation to AF recurrence. 46 participants with persistent AF and 41 age-matched participants with no AF were recruited. LAS and LASt were measured before and immediately after CV using 2D speckle tracking imaging (2DSI). Maintenance of sinus rhythm was assessed over a 6-month follow up. Mean LAS was lower, and mean LASt higher, in participants with AF before CV as compared to control group (11.9 ± 1.0 vs 35.7 ± 1.7, p|0.01 and 1.31 ± 0.17 vs 0.23 ± 0.01, p|0.01, respectively). There was an increase in the mean LAS immediately after CV (11.9 ± 1.0 vs 15.9 ± 1.3, p|0.01), whereas mean LASt did not change significantly after CV (p=0.62). Although neither LAS nor LASt were independently associated with AF recurrence during
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TY - JOUR. T1 - Best method in clinical practice and in research studies to determine left atrial size. AU - Lester, Steven Jay. AU - Ryan, Elizabeth W.. AU - Schiller, Nelson B.. AU - Foster, Elyse. PY - 1999/10/1. Y1 - 1999/10/1. N2 - Although the anteroposterior dimension of the left atrium is universally used in clinical practice and research, we hypothesized that it may be an inaccurate surrogate for volume because its use is based on the unlikely assumption that there is a constant relation among atrial dimensions. The following measurements of the left atrium were made at end ventricular systole: (1) M-mode-derived anteroposterior linear dimension from the parasternal long-axis view; (2) digitized planimetry of the left atrial (LA) cavity from the apical 4-chamber view; and (3) digitized planimetry of the LA cavity from the apical 2-chamber view. The following volume calculations were obtained from these digital measurements: (1) volume derived from the M-mode dimension assuming a ...
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Milani, R. V., Davis, C. T., Lavie, C. J. and Mehra, M. R. (2005). Importance of left atrial volume in predicting reduced peak aerobic capacity in advanced systolic dysfunction. In: Journal of Heart and Lung Transplantation. , , (S129-S130). . doi:10.1016/j.healun.2004.11.292 ...
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The mechanical function of the left atrium (LA) plays a pivotal role in modulation of left ventricular filling. Assessment of LA function might be a clinically useful prognostic tool for horses with mitral regurgitation or atrial fibrillation. However, the most accurate, reliable, and clinically useful methods to assess LA myocardial function are yet to be determined. The objective of this study w ...
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Theodorakis GN, Panou F, Markianos M, Fragakis N, Livanis EG, Kremastinos DT (February 1997). "Left atrial function and atrial ... That's due to increase in left atrial pressure and left ventricular filling pressure, which is due to decreased cardiac output ... and decreased left atrial total emptying fraction associated with ventricular pacing. The loss of physiologic timing of atrial ... Ventricular pacing is associated with elevated right and left atrial pressures, as well as elevated pulmonary venous and ...
... is a function of atrial contraction. The ratio between e' and a' is also a measure of diastolic function, in addition to the ... is a measure of left ventricular diastolic function, and has been shown to be relatively independent of left ventricular ... Before the advent of tissue Doppler, systolic function was usually assessed with ejection fraction (EF), and diastolic function ... this pressure difference is both a function of the pressure drop during early relaxation and the initial atrial pressure. In ...
The AV node connects the atrial and ventricular chambers. It functions to carry the electrical impulse from the atria to the ... While the left abdominal air sac is large and lies to the left of the mesentery. The connection from the main mesobronchi to ... The ureters leave the ventral caudomedial surface and continue caudally, near the midline into the opening of the urodeum of ... For example, they use their wings to cover the naked skin of the upper legs and flanks to conserve heat, or leave these areas ...
Normal atrial function is essential for embryogenesis, as inactivation of the MYL7 gene was embryonic lethal at ED10.5-11.5. ... Importantly, overexpression of ALC-1 was shown to attenuate heart failure in pressure-overloaded animals, by enhancing left ... Huang C, Sheikh F, Hollander M, Cai C, Becker D, Chu PH, Evans S, Chen J (December 2003). "Embryonic atrial function is ... Atrial Light Chain-1 (ALC-1), also known as Essential Light Chain, Atrial is a protein that in humans is encoded by the MYL4 ...
... atrial function MeSH G09.330.582.075.100 - atrial function, left MeSH G09.330.582.075.200 - atrial function, right MeSH G09.330 ... ventricular function MeSH G09.330.582.962.800 - ventricular function, left MeSH G09.330.582.962.900 - ventricular function, ...
Effects of balloon mitral valvuloplasty on left atrial function in mitral stenosis as assessed by pressure-area relation. J Am ... Assessment of left atrial pressure-area relation in humans by means of retrograde left atrial catheterization and ... He subsequently made studies on the elastic properties of aorta and the function of left atrium. A large part of his research ... Aortic function in arterial hypertension determined by pressure-diameter relation: Effects of diltiazem. Circulation. 1997 Sep ...
... left and right atrial size (which predicts the likelihood that AF may become permanent), left ventricular size and function, ... Diastolic dysfunction is also associated with AF, which increases left atrial pressure, left atrial volume, size, and left ... the lack of an organized atrial contraction can result in some stagnant blood in the left atrium (LA) or left atrial appendage ... Al-Saady, N. M.; O. A. Abel; A. J. Camm (1999). "Left atrial appendage: structure, function, and role in thromboembolism". ...
Parallel to "diastolic function", the term "systolic function" is usually referenced in terms of the left ventricular ejection ... diastolic intervals consist of early rapid filling E-waves followed by diastasis and followed by atrial systole-generated A- ... The most established index to describe left ventricular diastolic function is Tau, left ventricular diastolic time constant. ... To better understand diastolic function, it is crucial to realize that the left ventricle is a mechanical suction pump at, and ...
RAI = right atrial area / left atrial area. These measurements are made from the apical four chamber view.[citation needed] ... developed several Doppler echocardiographic numeric parameters over the last two decades to assess cardiac diastolic function. ... 2011; 124: A11559 Right atrial to left atrial area ratio on early echocardiography predicts long-term survival after acute ... from the standard transthoracic Doppler echocardiogram measurements of the right atrial area divided by the left atrial area. ...
This appears to "function as a decompression chamber during left ventricular systole and during other periods when left atrial ... The case of a disappearing left atrial appendage thrombus: direct visualization of left atrial thrombus migration, captured by ... 1999). "Left atrial appendage: structure, function, and role in thromboembolism: Review". Heart. 82 (5): 547-54. doi:10.1136/ ... The left atrial appendage can be seen on a standard posteroanterior x-ray, where the lower level of the left hilum becomes ...
Elevated right atrial pressure (>12mmHg), Moderate pulmonary hypertension, Normal systolic function, Poor diastolic function, ... Cite journal requires ,journal= (help) Pollak, A; Falk, R H (1993-08-01). "Left ventricular systolic dysfunction precipitated ... Vasodilators are also typically ineffective because systolic function is usually preserved in cases of RCM. Heart failure ... Patients will demonstrate normal systolic function, diastolic dysfunction, and a restrictive filling pattern. 2-dimensional and ...
Vengen ØA, Ellingsen Ø, Lande K, Ilebekk A. Significance of right atrial function during right sided inotropic stimulation of ... Vengen ØA, Lande K, Ellingsen Ø, Ilebekk A. Cardiac adjust¬ments to left side inotropic stimulation of in situ pig hearts. Am J ... Vengen ØA, Ellingsen Ø, Ilebekk A. Forward diastolic flow in pulmonary artery induced by right atrial contraction of in situ ... Kemi OJ, Ellingsen Ø, Smith GL, Wisløff U. Exercise-induced changes in calcium handling in left ventricular cardiomyocytes. ...
Mutations in MYH10 have been identified in patients with left atrial enlargement. NM-IIB is 228.9 kDa protein composed of 1976 ... Various functions of NM-IIB require the phosphorylation of the regulatory light chain MLC20, including cell migration and cell ... Single nucleotide polymorphisms in MYH10 were detected in patients with left atrial enlargement. MYH10 was identified to be a ... Insights into the function of NM-IIB specifically have come from studies employing transgenic animals. NM-IIB is clearly ...
The atrial lead is the curved one making a U shape in the upper left part of the figure. ... as well as between the septal and lateral walls of the left ventricle can be adjusted to achieve optimal cardiac function. ... can have negative effects on heart function. Indeed, it has been associated with increased risk of atrial fibrillation, heart ... Atrial septostomy. Balloon septostomy. creation of septal defect in heart Blalock-Hanlon procedure. shunt from heart chamber to ...
Less common findings include left ventricular hypertrophy, premature atrial and ventricular contractions, atrial fibrillation, ... It can alter cardiac function, with increased heart rate, increased left ventricular mass index, increased cardiac ... Studies of thyroid function and immune parameters in patients with hyperthyroid Graves' disease in remission. Murakami M, ... January 2009). "Thyroid function abnormalities and cognitive impairment in elderly people: results of the Invecchiare in ...
Often, reverse remodeling, or improvement in left ventricular function, will also be seen.[citation needed] Anatomy portal Dor ... However, atrial natriuretic peptide is thought to be cardio-protective. Remodeling of the heart is evaluated by performing an ... Ventricular mass and volume increase, which together adversely affect cardiac function. Eventually, diastolic function, or the ... may actually reverse the remodeling process by reducing left ventricular volumes and improving systolic function. Early ...
Mild left atrial enlargement: the test will help to determine if the left atrium is enlarged due to alternate blood flows Right ... and functioning of left ventricle. The ECG can also be used to determine the rhythm of the heart to determine if there is an ... This is caused by blood flowing from left atrium to the right atrium causing a higher left atrial pressure and leading to ... pulmonary vascular congestion, marked left atrial enlargement: the test will help to determine if there is a sign of MS and ...
... rapid atrial and ventricular pacing, and left bundle branch block. The types of SVT associated with TIC include atrial ... Studies show that left ventricular function often improves within 1 month of treatment of the tachyarrhythmia, and ... Previously normal left ventricular ejection fraction or left ventricular systolic dysfunction out of proportion to a patient's ... In addition to decreased left ventricular ejection fraction, studies indicate that patients with TIC may have a smaller left ...
Left heart. *(pulmonary veins) → left atrium (atrial appendage) → mitral valve → left ventricle → aortic valve (aortic sinus ... During diastole, a normally-functioning mitral valve opens as a result of increased pressure from the left atrium as it fills ... Diastole ends with atrial contraction, which ejects the final 30% of blood that is transferred from the left atrium to the left ... displaystyle A(x,t)=A_{0}\left(1-[1-{\Lambda }(t)]{x \over {L}}\right)^{2}}. ∫. 0. L. p. (. x. ,. t. ). ∂. A. ∂. x. d. x. =. [ ...
Left atrial appendage isomerism, also called left atrial isomerism, is a cardiac development defect in which the heart has 2 ... have been indicated in sporadic and familial cases of atrial isomerism. Disrupted mitochondria function has also been recently ... whereas those with left atrial isomerism fail to develop a sinus node at all. Thus, patients with left atrial isomerism are ... Right-atrial and left-atrial isomerism and associated pulmonary issues are treated in a series of steps based on the severity ...
Left atrial flutter is considered atypical and is common after incomplete left atrial ablation procedures. Atypical atrial ... Prolonged atrial flutter with fast heart rates may lead to decompensation with loss of normal heart function (heart failure). ... A blood clot in the left atrial appendage is particularly important as the left side of the heart supplies blood to the entire ... Similar to the abnormal heart rhythm atrial fibrillation, atrial flutter also leads to poor contraction of the atrial chambers ...
Long-term therapy with pilsicainide is successful in treating chronic atrial fibrillation). It functions by blocking the fast ... of pilsicainide effectively restores normal sinus rhythm in patients with recent-onset atrial fibrillation and a healthy left ... It is especially effective in the treatment of atrial fibrillation. Atrial fibrillation is the most common type of arrhythmia. ... "Determination of refractory periods and conduction velocity during atrial fibrillation using atrial capture in dogs: direct ...
... early-to-atrial left ventricular filling ratio), the E (early left ventricular filling) deceleration time, and the isovolumic ... Compromise of left ventricular forward function may result in symptoms of poor systemic circulation such as dizziness, ... Backward failure can be subdivided into the failure of the left atrium, the left ventricle or both within the left circuit. The ... Left-sided failure[edit]. The left side of the heart is responsible for receiving oxygen-rich blood from the lungs and pumping ...
The atrial lead is the curved one making a U shape in the upper left part of the figure. ... Basic functionEdit. Modern pacemakers usually have multiple functions. The most basic form monitors the heart's native ... Thus, timing between the atrial and ventricular contractions, as well as between the septal and lateral walls of the left ... as in atrial fibrillation. The equivalent atrial pacing mode is AAI or AAIR which is the mode of choice when atrioventricular ...
... early-to-atrial left ventricular filling ratio), the E (early left ventricular filling) deceleration time, and the isovolumic ... Left ventricular diastolic function can be determined through echocardiography by measurement of various parameters such as the ... In systolic dysfunction, the ejection fraction is decreased, leaving an abnormally elevated volume of blood in the left ... In left-sided heart failure edema can occur in the lungs - this is called cardiogenic pulmonary edema. This reduces spare ...
Diastole ends with atrial contraction, which ejects the final 30% of blood that is transferred from the left atrium to the left ... During diastole, a normally-functioning mitral valve opens as a result of increased pressure from the left atrium as it fills ... displaystyle A(x,t)=A_{0}\left(1-[1-{\Lambda }(t)]{x \over {L}}\right)^{2}}. ∫. 0. L. p. (. x. ,. t. ). ∂. A. ∂. x. d. x. =. [ ... It is on the left side of the heart and allows the blood to flow from the left atrium into the left ventricle. ...
... preservation of systolic function, and/or rate control for atrial fibrillation with a rapid ventricular response. Heart Failure ... Other species of Lepidoptera eat the leaves, including the lesser yellow underwing. Digitalis is an example of a drug derived ... atrial fibrillation. Digitalis is hence often prescribed for patients in atrial fibrillation, especially if they have been ... and increasing with impaired kidney function), whereas digitoxin's is about 7 days and not affected by kidney function. Both ...
... as a result of the inability of the left heart to pump enough blood to sustain normal organ function. In fetal life, this is ... A balloon atrial septostomy is also done. This ensures that there is enough of a connection between the two atria of the heart ... Fetal aortic stenosis impairs left ventricular development, which can lead to hypoplastic left heart syndrome. If untreated, ... a varying degree of left ventricular hypertrophy and abnormal Doppler flow characteristics in the left heart. There may be ...
The gene was identified by positional cloning.[4] The EVC gene maps to the chromosome 4 short arm (4p16). The function of a ... This leaves Ellis-van Creveld syndrome with its initialism, EVC, as the only satisfactory designation. Chondroectodermal ... Congenital heart defects (most commonly an atrial septal defect producing a common atrium, occurring in 60% of affected ... and may have served a useful function in defining this then little known condition for the medical profession, as well as the ...
Atrial fibrillation[edit]. Atrial fibrillation is one of the most common cardiac arrhythmias. In general, it is an irregular, ... Unstable means that either important organ functions are affected or cardiac arrest is about to occur.[4] ... Sinus tachycardia, which originates from the sino-atrial (SA) node, near the base of the superior vena cava ... Depending on the patient's health and other variables such as medications taken for rate control, atrial fibrillation may cause ...
The NEEMO 13 Crew: Left to right: JAXA astronaut Satoshi Furukawa, Smith, NASA astronauts Nicholas Patrick and Richard R. ... the failure of the electronic functions of his Inspiration closed circuit rebreather (CCR) due to hydrodynamic forces from the ... Atrial septal defect. *Effects of drugs on fitness to dive. *Fitness to dive ...
The AV node connects the atrial and ventricular chambers. It functions to carry the electrical impulse from the atria to the ... While the left abdominal air sac is large and lies to the left of the mesentery.[61] The connection from the main mesobronchi ... Function. The common ostrich is an endotherm and maintains a body temperature of 38.1-39.7 °C (100.6-103.5 °F) in its extreme ... Kidney function. Common ostrich kidneys are fairly large, and so are able to hold significant amounts of solutes. Hence, common ...
If left untreated, ventricular fibrillation (VF, or V-fib) can lead to death within minutes. When a heart goes into V-fib, ... Atrial fibrillation is often due to serious underlying medical conditions, and should be evaluated by a physician. It is not ... Fibrillation occurs when the heart muscle begins a quivering motion due to a disunity in contractile cell function. ... Atrial fibrillation can also be treated through a procedure, e.g. pulmonary vein isolation. This is performed by a cardiologist ...
Ring opening in the indole heterocyclic ring could generate new amine and keto functions. The new quinoline heterocycle would ... which had left Lima two years before, since in fact it had been in Seville in 1632, where he published one of his books and [ ... In people with atrial fibrillation, conduction defects, or heart block, quinine can cause heart arrhythmias, and should be ... it is said that it bears leaves in the form of a heart, and that it bears no fruit. This tree has a thick bark, very solid and ...
Atrial septostomy. Balloon septostomy. creation of septal defect in heart Blalock-Hanlon procedure. shunt from heart chamber to ... left ventricle to aorta Rastelli procedure. right ventricle to pulmonary artery Sano shunt. compound procedures. for ...
The liver also has many regulatory functions of the metabolism. An important function is the production and control of bile ... This causes heart muscle cells to secrete the hormone atrial natriuretic peptide (ANP) into the blood. This acts on the kidneys ... When the arterial blood pressure rises the arterioles are stimulated to dilate making it easier for blood to leave the arteries ... Kluge, Matthew J. (2015). Fever: Its Biology, Evolution, and Function. Princeton University Press. p. 57. ISBN 9781400869831.. ...
The staining is usually most intense in the dorso-caudal region of the left and right diaphragmatic lobes which often ... pulmonary infection or atrial fibrillation, inflammation, longer distances, longer duration of exercise, hard surfaces, ... with consequent loss of lung function. ... slow left ventricular relaxation time, right tricuspid valve ...
Hemoglobin's function can also be lost by chemically oxidizing its iron atom to its ferric form. This form of inactive ... namely removing the allosteric shift of the oxygen dissociation curve and shifting the foot of the curve to the left. In so ... To improve lung function, doctors frequently place infants at risk of hypoxia inside incubators (also known as humidicribs) ... diseases interfering in lung function resulting in a ventilation-perfusion mismatch, such as a pulmonary embolus, or ...
FunctionEdit. Major Aorta anatomy displaying Ascending Aorta, Brachiocephalic trunk, Left Common Carotid Artery, Left ... The difference between aortic and right atrial pressure accounts for blood flow in the circulation.[16] When the left ventricle ... Left common carotid artery. Left subclavian artery. Descending aorta, thoracic part: Left bronchial arteries. esophageal ... For example, the left vertebral artery may arise from the aorta, instead of the left common carotid artery.[9]:188 ...
The second chamber functions as a "water seal", which acts as a one way valve allowing gas to escape, but not reenter the chest ... Left-sided pneumothorax (right side of image) on CT scan of the chest with chest tube in place. ... to the retained blood can lead to pleural and pericardial effusions and contribute to the triggering of postoperative atrial ... Alternatively, a large adhesive plaster that functions like a tape bridge may be used.[23] ...
The other rare E.C.G. changes include deformity of QRS complexes, prolongation of PR interval, atrial premature beats, and ... Magnetic resonance cholangiopancreatography (MRC) image showing a voluminous and heterogeneous collection in the left liver ... Liver function tests. *Serological tests. Management[edit]. This section needs additional citations for verification. Please ... atrial tachycardia. In adults, fatal cases have been reported with a total dose of 0.6 G. or less. The incidence of toxic heart ...
Atrial. *Right marginal. *Posterior interventricular. *Left coronary: *Anterior interventricular. *Left circumflex (Left ... Function[edit]. See also: Circulatory system. Blood vessels function to transport blood. In general, arteries and arterioles ... a b c Anatomy Physiology: The Unity of Form and Function, Saladin, McGraw Hill, 2012 ... Left heart → Aorta → Arteries → Arterioles → Capillaries → Venules → Veins → Vena cava → (Right heart) ...
Left atrial contraction (left atrial systole) (during left ventricular diastole) causes added blood to flow across the mitral ... Function[edit]. See also: Heart valves. During left ventricular diastole, after the pressure drops in the left ventricle due to ... Left heart. *(pulmonary veins) → left atrium (atrial appendage) → mitral valve → left ventricle → aortic valve (aortic sinus ... in area and sits in the left heart between the left atrium and the left ventricle. It has two leaflets (or "cusps"), an ...
This results in conditions such as conjoined twins, and the resulting merged organism may die at birth when it must leave the ... Rubella can also lead to atrial and ventricular septal defects in the heart. If exposed to rubella in the second trimester, the ... All three disorders cause abnormal brain function or mental retardation. Hepatosplenomegaly is the enlargement of the liver and ... Around a 5% increase in the incidence of ventricular septal defects, atrial septal defects, and patent ductus arteriosus in ...
It is much less than arterial pressure, with common values of 5 mmHg in the right atrium and 8 mmHg in the left atrium. ... Central venous pressure, which is a good approximation of right atrial pressure,[35] which is a major determinant of right ... The most important arterial baroreceptors are located in the left and right carotid sinuses and in the aortic arch.[70] ... Differences between left and right arm blood pressure measurements tend to be small. However, occasionally there is a ...
Male left, female on the right.) 1. Pineal gland 2. Pituitary gland 3. Thyroid gland 4. Thymus 5. Adrenal gland 6. Pancreas 7. ... It helps to regulate metabolism, growth and development, tissue function, and plays a part also in mood.[1] The field of ... Atrial-natriuretic peptide (ANP) Cardiac myocytes. *Brain natriuretic peptide (BNP) Cardiac myocytes ...
Left heart. *(pulmonary veins) → left atrium (atrial appendage) → mitral valve → left ventricle → aortic valve (aortic sinus ... Maceira A (2006). "Normalized Left Ventricular Systolic and Diastolic Function by Steady State Free Precession Cardiovascular ... Left atrial dimension. LA. Range 24 - 40 mm[16] Fractional shortening (FS) is the fraction of any diastolic dimension that is ... Left ventricular end-diastolic dimension. LVEDD or sometimes LVDD. The end-diastolic dimension of the left ventricle.. 48 mm,[ ...
It is used in recurrent atrial flutter (Afl), atrial fibrillation (AF), supraventricular tachycardia (SVT), atrial tachycardia ... Whether for back or knee pain, a drawback for this procedure is that nerves recover function over time, so the pain relief ... boiling within tissue that can leave "a gaping hole", tears, or even charring. RFA, or rhizotomy, is sometimes used to treat ... Ablation is now the standard treatment for SVT and typical atrial flutter and the technique can also be used in AF, either to ...
Thus, common clinical indications for warfarin use are atrial fibrillation, the presence of artificial heart valves, deep ... and that this was functioning as a potent anticoagulant.[81] Only spoiled hay made from sweet clover (grown in northern states ... Acyclic tautomer (left) and cyclic hemiketal tautomer (right). X-ray crystallographic studies of warfarin show that it exists ... results from the National Registry of Atrial Fibrillation 2". Archives of Internal Medicine. 166 (2): 241-6. doi:10.1001/ ...
absence of left atrial (LA) hypertension *pulmonary artery wedge pressure , 18 mmHg (obtained by pulmonary artery ... Several studies have shown that pulmonary function and outcome are better in people with ARDS who lost weight or whose ... if no measured LA pressure available, there must be no other clinical evidence to suggest elevated left heart pressure. ... The drug is known to function by enhancing lung CD73 expression and increasing production of anti-inflammatory adenosine, such ...
Atrial lead at the right appendage - Right ventricular lead at the apex. - Left ventricular lead through the coronary sinus.[5] ... to treat heart failure by coordinating the function of the left and right ventricles via a pacemaker, a small device inserted ... The key indication for CRT is left bundle branch block (LBBB) of the heart, a cardiac abnormality leading to delayed left ... contributing to poor left ventricular coordination and reduced systolic function, thereby reduced ejection fraction (,35%). ...
displaystyle U_{s}={\frac {2}{9}}{\frac {\left(\rho _{p}-\rho _{f}\right)}{\mu }}g\,a^{2}}. [4]. Where a is the particle radius ... Since pressure is a function of force per unit area, (P = F/A), the larger the surface area, the lesser the pressure when an ... A simplified form of this equation assumes right atrial pressure is approximately 0: CO ≈ MAP/TPR. The ideal blood pressure in ... It is a fluid layer in which at a distance δ, viscosity η is a function of δ written as η(δ), and these surrounding layers do ...
Part of this function is the tight coordination of mechanical events, such as the contraction of the heart. A second function ... The two conductances on the left, for potassium (K) and sodium (Na), are shown with arrows to indicate that they can vary with ... Tamargo J, Caballero R, Delpón E (January 2004). "Pharmacological approaches in the treatment of atrial fibrillation". Curr. ... Bullock, TH; Horridge, GA (1965). Structure and Function in the Nervous Systems of Invertebrates. A series of books in biology ...
... volumes of the left atrium and ventricle were calculated in 52 volunteers by 2-dimensional echocardiography. A light pen ... To obtain normal values for left atrial function noninvasively, ... To obtain normal values for left atrial function noninvasively ... End-systolic left atrial volume (mean +/- standard deviation) was 37 +/- 11.7 ml or 21 +/- 6.6 ml/m2. The change in left atrial ... These values are similar to those reported in studies in which left atrial function was calculated from contrast angiography.. ...
Left ventricular filling dynamics: influence of left ventricular relaxation and left atrial pressure. Circulation1986;74:187-96 ... but also by left atrial pressure.4 Increased left atrial pressure may produce increased atrioventricular pressure gradient and ... In chronic atrial fibrillation (AF) left ventricular function may gradually diminish as a result of an intrinsic ... Factors with potential influence on atrial mechanical function include duration of AF and the properties of the left ventricle- ...
... decreases the intensity of spontaneous left atrial contrast, reduces the size of the left atrium, and improves left atrial ... and improves left atrial function in patient with mitral stenosis. However, left atrial mechanical functions immediately after ... Left atrial mechanical functions were evaluated before and after PMV, including left atrial passive emptying volume, LA passive ... The other left atrial volumes were not altered after PMV. The early increase in conduit volume and the decrease in left atrial ...
... structure and function occur in patients with diastolic heart failure (DHF). The reasons for the transition from asymptomatic ... Background-Abnormalities in left ventricular (LV) structure and function occur in patients with diastolic heart failure (DHF). ... S), and atrial contraction (LAA) were measured. The ratio of wedge pressure to LAS strain was used as an index of LA stiffness ... with no significant difference between patients with DHF and diastolic dysfunction in LA systolic function indices, LV mass, LA ...
However, chronic AF associated with mitral valve disease deteriorates LA mechanical function diffusely throughout the LA wall. ... Multislice computed tomography accurately quantifies left atrial size and function after the MAZE procedure Circulation. 2006 ... Background: Although the MAZE procedure allows for the recovery of sinus rhythm and left atrial (LA) mechanical function in the ... All patients with MAZE were free of AF and other atrial arrhythmias during the follow-up period. In the CABG group, LA maximal ...
Effects of Dronedarone on Cardiac Geometry and Function in Patients With Atrial Fibrillation and Left Atrial Enlargement ( ... left atrial (LA) function was assessed at baseline and after 12 months treatment using 2-D echocardiography and interpreted ... Evaluate the effects of dronedarone versus placebo on left atrial function;. *Evaluate the effects of dronedarone versus ... placebo on left atrial dimension;. *Evaluate the effects of dronedarone versus placebo on left ventricular function (LVEF, E, E ...
... and Function. Petr Kuchynka,1,2 Jana Podzimkova,1 Martin Masek,3 Lukas Lambert,3 Vladimir Cerny,3 Barbara Danek,1 and Tomas ... atrial fibrillation require the need for detailed knowledge of left atrial and pulmonary venous morphology as well of atrial ... This review article discusses the role of cardiac magnetic resonance and computed tomography in assessment of left atrial size ... The Role of Magnetic Resonance Imaging and Cardiac Computed Tomography in the Assessment of Left Atrial Anatomy, Size, ...
"Right atrial MR imaging studies of cadaveric atrial casts and comparison with right and left atrial volumes and function in ... L. Christiaens, N. Varroud-Vial, P. Ardilouze et al., "Real three-dimensional assessment of left atrial and left atrial ... Additional value of analyzing left atrial size, left atrial ejection fraction and the difference in duration of pulmonary ... "Left atrial function and scar after catheter ablation of atrial fibrillation," Heart Rhythm, vol. 5, no. 5, pp. 656-662, 2008. ...
Abstract 13554: Left Atrial Function in Children by Volume and Strain Analysis: Impact of Congenital Aortic Stenosis. Divya ... Background: Left atrial (LA) function by volume and strain analysis in children has been little studied. LA dysfunction related ... Abstract 13554: Left Atrial Function in Children by Volume and Strain Analysis: Impact of Congenital Aortic Stenosis ... Abstract 13554: Left Atrial Function in Children by Volume and Strain Analysis: Impact of Congenital Aortic Stenosis ...
Extensive ablation during PVAI does not cause deterioration in LA function, and may cause long-term improvement, especially in ... and improve left atrial (LA) function, the effect of extensive LA ablation on LA function is not well known. ... and left atrial fractional area change (LFAC) were assessed by TTE. Transmitral (TMF), left atrial appendage (LAA), and ... Extensive ablation during pulmonary vein antrum isolation has no adverse impact on left atrial function: an echocardiography ...
Abstract 8124: Effect of Strong Lipophilic Statin Therapy on Left Atrial Structure and Function Assessed by Speckle Tracking ... Abstract 8124: Effect of Strong Lipophilic Statin Therapy on Left Atrial Structure and Function Assessed by Speckle Tracking ... Abstract 8124: Effect of Strong Lipophilic Statin Therapy on Left Atrial Structure and Function Assessed by Speckle Tracking ... Abstract 8124: Effect of Strong Lipophilic Statin Therapy on Left Atrial Structure and Function Assessed by Speckle Tracking ...
left atrial. LAKE. left atrial kinetic energy. LAV. left atrial volume. LAVi. left atrial volume indexed to body surface area. ... 1999) Left atrial relaxation and left ventricular systolic function determine left atrial reservoir function. Circulation 100: ... 2012) The impact of atrial fibrillation ablation left atrial function: association with baseline left atrial function. Pacing ... 2012) Left atrial minimum volume and reservoir function as correlates of left ventricular diastolic function: impact of left ...
... of LAA and left atrial spontaneous echo contrast (SEC) of left atrial appendage before ECV and after ECV 24 hours, 3 days and 1 ... function in success of electrial cardioversion (ECV) in patients with nonvalvular atrial fibrillation (NVAF), and observe the ... thrombogenic milieu Patients with atrial fibrillation should be given full anticoagulation to prevent thrombogenesis in left ... course of the recovery of LAA systaltic function Methods To test blood flow wave patterns, peak emptying velocity (PEV) ...
Left atrial myocardial function in either physiological or pathological left ventricular hypertrophy: a two-dimensional speckle ... Left atrial myocardial function in either physiological or pathological left ventricular hypertrophy: a two-dimensional speckle ...
1998) Assessment of left atrial appendage function after cardioversion of atrial fibrillation: relation to left atrial ... 1993) Altered left atrial compliance after atrial appendectomy. Influence on left atrial and ventricular filling. Circ Res 72: ... 2014) Complex left atrial appendage morphology and left atrial appendage thrombus formation in patients with atrial ... 2000) Left atrial appendage flow velocities in subjects with normal left ventricular function. Am J Cardiol 86:769-773. ...
The Left Atrial Appendage: Anatomy, Function, and Noninvasive Evaluation. Roy Beigel, Nina C. Wunderlich, Siew Yen Ho, Reza ... LAA = left atrial appendage; MDCT = multidetector computed tomography; TEE = transesophageal echocardiography; TTE = ... 3D TEE is superior to 2D TEE in visualizing the LAA orifice in relation to surrounding structures (e.g., mitral valve, left ...
Efficacy of Dofetilide in the Treatment of Atrial Fibrillation-Flutter in Patients With Reduced Left Ventricular Function. A ... Efficacy of Dofetilide in the Treatment of Atrial Fibrillation-Flutter in Patients With Reduced Left Ventricular Function. A ... There were 506 patients with atrial fibrillation/flutter (AF/Fl), congestive heart failure (CHF) or recent myocardial ... this is the largest study to date demonstrating the survival advantage of sinus rhythm among patients with AF/Fl and left ...
Mount Sinai Researchers Find Gene Therapy Improved Left Ventricular and Atrial Function in Congestive Heart Failure by up to 25 ... Heart function improved by up to 25 percent in a trial using gene therapy to reverse cardiac damage from congestive heart ... Intracoronary Delivery of Gene Vector Was Safe and Improved Heart Function in a Large Animal Model *Share ... This is the first study using a novel vector for gene therapy to improve heart function in non-ischemic heart failure. ...
Association of Left Atrial Function Index with Atrial Fibrillation and Cardiovascular Disease: The Framingham Offspring Study. ... Left atrial (LA) size, a marker of atrial structural remodeling, is associated with increased risk for atrial fibrillation (AF ... We tested the hypothesis that LA function index (LAFI), an echocardiographic index of LA structure and function, may better ... In our prospective investigation of a moderate-sized community-based sample, LAFI, a composite measure of LA size and function ...
Left information including symptoms, causes, diseases, symptoms, treatments, and other medical and health issues. ... Introduction: Atrial Function, Left. Description of Atrial Function, Left. Atrial Function, Left: The hemodynamic and ... Left: *Atrial Function *Atrial *Atrial symptoms (24 causes) *Left Interesting Medical Articles:. *Symptoms of the Silent Killer ... Atrial Function, Left: Related Topics. These medical condition or symptom topics may be relevant to medical information for ...
Influence of heart rate and atrial transport on left ventricular volume and function: relation to hemodynamic changes produced ... Influence of heart rate and atrial transport on left ventricular volume and function: relation to hemodynamic changes produced ... Influence of heart rate and atrial transport on left ventricular volume and function: relation to hemodynamic changes produced ... Left ventricular ejection fraction did not change significantly with atrial pacing (from 0.65 +/- 0.02 [mean +/- standard error ...
Vmax, maximum left atrial volume; Vp, presystolic left atrial volume; Vmin, minimum left atrial volume; LAPEV, left atrial ... left atrial passive emptying fraction; CV, conduit volume; LAAEV, left atrial active emptying volume; LAAEF, left atrial active ... 1. Left atrial mechanical functions and left atrial conduction times might be impaired before the development of overt diabetes ... The left atrial volumes were calculated by the disk method. Left atrial mechanical functions were calculated. ...
... alters left atrial (LA) contractile function in a predictable manner. While increased LA size is a marker of LV diastolic ... Even after adjustment for age, gender, left atrial volume, and LVEF, LAEFContractile maintained strong independent associations ... function, myocardial ischemia, or viability. Calculation of LA volumes used in determining LA emptying functions was performed ... Decreased LA contractile function (LAEFContractile) demonstrated strong unadjusted associations with patient mortality, non- ...
LA: Left Atrium. LA Vol: Left Atrial Volume. LA C.O.: Left Atrial Cardiac Output. LVEF: Left Ventricular Ejection Fraction. ... Detection of left atrial scar and changes of cardiac function in relation to AF ablation, by 3D late gadolinium enhancement. ... Determinants of AFCA success and post-AFCA left atrial remodeling are poorly understood. Delayed Enhancement Cardiac Magnetic ... Pre and Postablation DE-CMR images of the left atrium (same patient) A. Preablation Image (0.00% LA Scar, LA Vol. of 136.1 ml ...
Left atrial function. Slovut DP, Taub CT. Immediate Improvement of Left Atrial Appendage Contractility after Transcatheter ... 1 attachment , Tags: Left atrial function, low-gradient severe aortic stenosis, paradoxical low-fl ow, transcatheter aortic ... Valve Replacement in a Patient with Paradoxical Low-Flow Low-Gradient Aortic Stenosis and Preserved Left Ventricular Function. ...
... Academic Article * ... and RT3DE were used to study 3D left atrial (LA) systolic and diastolic stroke volumes and index (LASVI, LAEDVI), emptying ... A decrease in diastolic E-wave, increased atrial kick (A-wave) with reduced E/A ratio, was noted as the pregnancy progressed. ... Background: Alteration of diastolic function is considered a sensitive means for detecting changes in the normal cardiac ...
... left atrial emptying fraction (LAEF), left atrial expansion index (LAi) and minimal left atrial volume index (MinLAVI)) with ... Left Atrial Function Determined by Echocardiography Predicts Incident Heart Failure in Patients With STEMI treated by Primary ... Prognostic Value of Left Atrial Functional Measures in Heart Failure With Reduced Ejection Fraction. Publikation: Bidrag til ... Rationale and Design of the Reduce Elevated Left Atrial Pressure in Patients With Heart Failure (Reduce LAP-HF) Trial. ...
Left atrial functional indices and measurements obtained from 2-dimensional echocardiography of healthy dogs and dogs with ... Data for: Two-dimensional echocardiographic estimates of left atrial function in healthy dogs and dogs with myxomatous mitral ... Left atrial functional indices and measurements obtained from 2-dimensional echocardiography of healthy dogs and dogs with ...
Left atrial minimum volume (LAVmin), left atrial pre-atrial contraction volume (LAVp) and left atrial maximum volume (LAVmax) ... has been reported very useful in evaluating left atrial (LA) function, as well as left ventricular (LV) function. The aim of ... whereas left atrial active ejection fraction (LAAEF) and left atrial passive ejection fraction (LAPEF) were obtained from ... such as left atrial diameter (LAD), peak E and A of mitralis (E, A), E/A, end-diastolic thickness of ventricular septum (IVST d ...
Left atrial volume and function in patients with atrial fibrillation. Together they form a unique fingerprint. * Left Atrial ... Left atrial volume and function in patients with atrial fibrillation. In: Current Opinion in Cardiology. 2014 ; Vol. 29, No. 5 ... title = "Left atrial volume and function in patients with atrial fibrillation",. abstract = "PURPOSE OF REVIEW: This review of ... Leong D, Dokainish H. Left atrial volume and function in patients with atrial fibrillation. Current Opinion in Cardiology. 2014 ...
  • Normal left atrial function determined by 2-dimensional echocardiography. (biomedsearch.com)
  • To obtain normal values for left atrial function noninvasively, volumes of the left atrium and ventricle were calculated in 52 volunteers by 2-dimensional echocardiography. (biomedsearch.com)
  • Left Atrial Volume index (LAVi) was assessed at baseline and after 12 months treatment using 2-D echocardiography and interpreted blindly via a central Echocardiography Core Lab. (clinicaltrials.gov)
  • left atrial (LA) function was assessed at baseline and after 12 months treatment using 2-D echocardiography and interpreted blindly via a central Echocardiography Core Lab. (clinicaltrials.gov)
  • Maximal left atrial diameter in the anteroposterior dimension was assessed at baseline and after 12 months treatment using 2-D echocardiography and interpreted blindly via a central Echocardiography Core Lab. (clinicaltrials.gov)
  • Minimum vs. maximum left atrial volume for prediction of first atrial fibrillation or flutter in an elderly cohort: a prospective study," European Journal of Echocardiography , vol. 10, no. 2, pp. 282-286, 2008. (hindawi.com)
  • C. P. Appleton, J. M. Galloway, M. S. Gonzalez, M. Gaballa, and M. A. Basnight, "Estimation of left ventricular filling pressures using two-dimensional and Doppler echocardiography in adult patients with cardiac disease. (hindawi.com)
  • Assessment of left atrial volume and function in patients with permanent atrial fibrillation: comparison of cardiac magnetic resonance imaging, 320-slice multi-detector computed tomography, and transthoracic echocardiography," European Heart Journal Cardiovascular Imaging , vol. 15, no. 5, pp. 532-540, 2014. (hindawi.com)
  • Atrial size and function can be assessed with echocardiography, cardiac computed tomography (CCT), and cardiac magnetic resonance (CMR). (onlinejacc.org)
  • Our aim was to evaluate volumetric and functional atrial parameters, using real time three-dimensional echocardiography (RT3DE) in women in early and late third trimester of pregnancy. (bgu.ac.il)
  • Left atrial functional indices and measurements obtained from 2-dimensional echocardiography of healthy dogs and dogs with myxomatous mitral valve disease. (mendeley.com)
  • And two-dimensional speckle tracking echocardiography (2D-STE) has been reported very useful in evaluating left atrial (LA) function, as well as left ventricular (LV) function. (biomedcentral.com)
  • 90 g/L) and group C (Hb60 ~ 90 g/L). Another 30 healthy people were also selected as control group A. Conventional echocardiography parameters, such as left atrial diameter (LAD), peak E and A of mitralis (E, A), E/A, end-diastolic thickness of ventricular septum (IVST d), end-diastolic thickness of LV posterior wall (PWTd) and left ventricular end-diastolic dimension (LVDd) were obtained from these three groups. (biomedcentral.com)
  • RECENT FINDINGS: This article will summarize recent developments in left atrial imaging that play a role in patients with atrial fibrillation, with particular emphasis on echocardiography, and with reference made to important advances in cardiac computed tomography and cardiac magnetic resonance. (edu.au)
  • Background: Left atrial (LA) strain (ε) and ε rate (SR) analysis by 2-dimensional speckle tracking echocardiography is a novel method for functional assessment of the LA. Objective: The purpose of this study was to determine the impact of left atrial appendage (LAA) exclusion by Lariat epicardial ligation on mechanical function of the LA by performing ε and SR analysis before and after the procedure. (elsevier.com)
  • Predictive role of left atrial and ventricular mechanical function in postoperative atrial fibrillation: a two-dimensional speckle-tracking echocardiography study. (acibadem.edu.tr)
  • Left atrial (LA) function (consisting of 3 phases: reservoir, conduit and booster pump) can be evaluated by speckle tracking echocardiography (STE) which measures myofiber deformation during these phases. (sonopath.com)
  • Recently, real-time three-dimensional echocardiography (RT3DE) has been reported as a useful tool for studying the phasic changes of the left atrial volumes. (biomedcentral.com)
  • Objectives: To investigate whether there is a relation between mitral annular velocities obtained by Doppler tissue imaging (DTI) and LAA function determined by transoesophageal echocardiography (TEE) and to determine if the annular velocities can predict the presence of the inactive LAA in MS. Methods: Sixty MS patients were evaluated by transthoracic echocardiography and all patients underwent transesophageal echocardiography. (who.int)
  • Percutaneous closure of the left atrial appendage: The value of real time 3D transesophageal echocardiography and the intraoperative change in the size of the left atrial appendage. (bioportfolio.com)
  • The aim of this study was to investigate the value of real time three-dimensional transesophageal echocardiography (RT3DTEE) in percutaneous closure of the left atrial appendage (LAAC). (bioportfolio.com)
  • Impact of revascularization of coronary chronic total occlusion on left ventricular function and electrical stability: analysis by speckle tracking echocardiography and signal-averaged electrocardiogram. (nih.gov)
  • Recommendations for the evaluation of left ventricular diastolic function by echocardiography: an update from the American Society of Echocardiography and the European Association of cardiovascular imaging. (springer.com)
  • Benisty J, Roller M, Sahar G, Paz R, Vidne B, Sagie A. Iatrogenic left ventricular-right atrial fistula following mitral valve replacement and tricuspid annuloplasty: diagnosis by transthoracic and transesophageal echocardiography. (springermedizin.at)
  • Imaging predictors of response to cardiac resynchronization therapy: left ventricular work asymmetry by echocardiography and septal viability by cardiac magnetic resonance. (uio.no)
  • Estimating left ventricular filling pressure by echocardiography. (uio.no)
  • Improved assessment of left ventricular volumes and ejection fraction by contrast enhanced harmonic color Doppler echocardiography. (rochester.edu)
  • DCM can manifest as impaired relaxation and increased stiffness of the myocardium ( 2 ), detectable preclinically by echocardiography as left ventricular diastolic dysfunction (LVDD). (diabetesjournals.org)
  • Heart muscle function and degree of scarring will be assessed with echocardiography at baseline and again at 12 months. (anzctr.org.au)
  • A light pen digitizing and computation system, controlled by a microprocessor, was used to outline the left atrium and ventricle in orthogonal apical views. (biomedsearch.com)
  • The mean fractional emptying of the left atrium was 65 +/- 8.9% and the conduit volume was 41 +/- 14.0 ml or 23 +/- 7.9 ml/m2. (biomedsearch.com)
  • It has been suggested that successful percutaneous balloon mitral valvuloplasty (PMV) decreases the intensity of spontaneous left atrial contrast, reduces the size of the left atrium, and improves left atrial function in patient with mitral stenosis. (biomedsearch.com)
  • In the last decade, there has been increasing evidence that comprehensive evaluation of the left atrium is of utmost importance. (hindawi.com)
  • The principal role of the left atrium is to modulate left ventricular (LV) filling and cardiovascular performance by functioning as a reservoir for pulmonary venous return during ventricular systole, a conduit for pulmonary venous return during early ventricular diastole, and a booster pump that augments ventricular filling during late ventricular diastole. (onlinejacc.org)
  • The left atrial appendage (LAA) is a finger-like extension originating from the main body of the left atrium. (onlinejacc.org)
  • The LAA derives from the primordial left atrium (LA), which is formed mainly by the adsorption of the primordial pulmonary veins and their branches (6) . (onlinejacc.org)
  • The researchers determined that the gene therapy was safe and significantly reversed heart failure by 25 percent in the left ventricle and by 20 percent in the left atrium. (mountsinai.org)
  • The hemodynamic and electrophysiological action of the LEFT ATRIUM . (rightdiagnosis.com)
  • The left atrium (LA) functions as a reservoir during systole, a conduit during early diastole and an active contractile chamber in late diastole [ 5 , 6 ]. (kjim.org)
  • LA: Left Atrium. (biomedcentral.com)
  • CONCLUSION: The present findings indicate that mitral valve replacement in patients with mitral valve stenosis, reduces the size of the left atrium, improves left atrial contractile function and depresses inflammatory and apoptotic process. (ox.ac.uk)
  • In humans , left atrial enlargement and reduced contractile functions are associated with adverse cardiovascular events and a poor prognosis in many dilatation of the left atrium occurs with the gradual evolution of chronic mitral valve disease and is well diseases . (bvsalud.org)
  • The left atrium is the most compromised cardiac chamber in dogs with chronic mitral valve disease (CMVD). (bvsalud.org)
  • The results showed that progressive characterized by the left atrium / aorta ratio and left atrium volume index. (bvsalud.org)
  • The left atrial diameter and volume indices and left atrium / aorta ratio correlated positively with the transmitral flow peak velocity E wave and E wave /IVRT ratio, which are important indices of diastolic function. (bvsalud.org)
  • The aim of this study was to investigate the performance of the left atrium in beta-thalassemic patients with preserved left ventricular ejection fraction (EF) and no iron overload, using RT3DE. (biomedcentral.com)
  • Tissue Doppler-derived strain and strain rate were measured from the apical four and two-chamber views of the left atrium, and global values were calculated as the mean of all segments. (bmj.com)
  • We sought to provide a practical educational tool for the utilization of intracardiac echography (ICE) in the left atrium for the percutaneous closure of the left atrial appendage (LAA). (bioportfolio.com)
  • Absence of the orifice between the RIGHT ATRIUM and RIGHT VENTRICLE, with the presence of an atrial defect through which all the systemic venous return reaches the left heart. (bioportfolio.com)
  • Atrial fibrillation (AF) carries out a 5-fold increase in stroke risk, related to embolization of thrombi clotting in left atrium (LA). Left atrial appendage (LAA) is the site with the highest blood stasis which causes thrombus formation. (frontiersin.org)
  • Description: Pulmonary vein isolation using a circumferential ablative approach in the left atrium. (strokecenter.org)
  • The acquired left ventricle-to-right atrium (LV-RA) shunt (Gerbode defect) is rare but it can sometimes be a critical condition. (springermedizin.at)
  • Echocardio results:concentric lvh w/ adeq systolic function, dilated left atrium, mild tricuspid reg, pulmonic reg. (healthtap.com)
  • 10 , 11 As several studies have demonstrated increased left ventricular mass and increased left atrium size in athletes, 12 it is possible that high BP may be a contributing factor 13 , 14 that may also link to the increased risk of atrial fibrillation in endurance athletes. (bmj.com)
  • An enlarged left atrium is frequently noted in chronic kidney disease (CKD). (medsci.org)
  • Although MitraClip implantation induces hemodynamic unloading of the left ventricle and atrium, myocardial wall stress does not consistently improve. (deepdyve.com)
  • He subsequently made studies on the elastic properties of aorta and the function of left atrium. (wikipedia.org)
  • 1 Little is known about left ventricular diastolic function in AF. (bmj.com)
  • LV mass, LV ejection fraction and E/e' as a diastolic function were measured. (ahajournals.org)
  • Pitavastatin had a beneficial effect on LA structure and function associated with preserved diastolic function through pleiotropic effects in elderly hypertensive patients. (ahajournals.org)
  • Background: Alteration of diastolic function is considered a sensitive means for detecting changes in the normal cardiac adaptation to pregnancy. (bgu.ac.il)
  • however, the effect on diastolic function and left atrial (LA) remodeling is unclear. (elsevier.com)
  • We assessed the effects of catheter ablation of PVCs on parameters of LV diastolic function and LA remodeling. (elsevier.com)
  • Conclusion: Catheter ablation of PVCs improved LV diastolic function and resulted in left atrial reverse remodeling. (elsevier.com)
  • Mitral inflow and tissue Doppler imaging were employed to estimate left ventricular diastolic function. (bmj.com)
  • Changes in phasic atrial volume and function occurred in conjunction with age-related changes in left ventricular diastolic function. (bmj.com)
  • Hoit BD, Shao Y, Gabel M. Left atrial systolic and diastolic function accompanying chronic rapid pacing-induced atrial failure. (springer.com)
  • We sought to determine whether structured exercise training (ET) improves maximal exercise capacity, left ventricular diastolic function, and quality of life (QoL) in patients with heart failure with preserved ejection fraction (HFpEF). (unboundmedicine.com)
  • Secondary endpoints included effects on cardiac structure, diastolic function, and QoL. (unboundmedicine.com)
  • This benefit is associated with atrial reverse remodeling and improved left ventricular diastolic function. (unboundmedicine.com)
  • Cardiac imaging to evaluate left ventricular diastolic function. (uio.no)
  • OBJECTIVE -To investigate the effects of fenofibrate and coenzyme Q 10 (CoQ) on diastolic function, ambulatory blood pressure (ABP), and heart rate (HR) in type 2 diabetic subjects with left ventricular diastolic dysfunction (LVDD). (diabetesjournals.org)
  • CONCLUSIONS -In type 2 diabetic subjects with LVDD, neither fenofibrate nor CoQ, alone or in combination, improved diastolic function significantly. (diabetesjournals.org)
  • From the left ventricular time-activity curve we directly measured left ventricular ejection fraction (EF). (bmj.com)
  • Additional value of analyzing left atrial size, left atrial ejection fraction and the difference in duration of pulmonary venous and mitral flow velocity at atrial contraction," Journal of the American College of Cardiology , vol. 22, no. 7, pp. 1972-1982, 1993. (hindawi.com)
  • In 10 patients count-derived left ventricular ejection fraction, end-diastolic volume and stroke volume were measured during sinus rhythm and during atrial pacing at 120, 140 and 160 beats/min. (ucl.ac.uk)
  • Left ventricular ejection fraction did not change significantly with atrial pacing (from 0.65 +/- 0.02 [mean +/- standard error of the mean] at a baseline sinus rate of 91 +/- 3 beats/min to 0.62 +/- 0.03 at 160 beats/min) despite a progressive decrease in end-diastolic volume. (ucl.ac.uk)
  • Left ventricular ejection fraction with baseline sequential A-V pacing at 100 beats/min was 0.67 +/- 0.03 and not significantly altered by either sequential A-V or simultaneous V/A pacing at 160 beats/min. (ucl.ac.uk)
  • The data indicate that the hemodynamic consequences of supraventricular tachyarrhythmias in patients with normal ventricular function are due primarily to decreases in ventricular volume as heart rate is increased and atrial contribution is lost rather than to any changes in left ventricular ejection fraction. (ucl.ac.uk)
  • While 'ejection fraction' is the phrase used for reduction of ventricular cavity volume, 'emptying function' is more appropriate for reductions of atrial volume as the atria lack inflow valves and empty passively as well as actively. (biomedcentral.com)
  • We correlated post AFCA scar with cardiac volumes and function including LA volume, LV ejection fraction (LVEF), and LV cardiac output (LVCO). (biomedcentral.com)
  • LVEF: Left Ventricular Ejection Fraction. (biomedcentral.com)
  • Left atrial minimum volume (LAVmin), left atrial pre-atrial contraction volume (LAVp) and left atrial maximum volume (LAVmax) were measured by Simpson's rule, whereas left atrial active ejection fraction (LAAEF) and left atrial passive ejection fraction (LAPEF) were obtained from calculation. (biomedcentral.com)
  • It is still unknown whether left ventricular ejection fraction (LVEF) might affect the magnitude of improvement after atrial fibrillation (AF) ablation on cardiac function in persistent or longstanding persistent AF (CAF) patients. (cumhuriyet.edu.tr)
  • Left atrial dysfunction relates to symptom onset in patients with heart failure and preserved left ventricular ejection fraction. (nih.gov)
  • Left atrial function predicts heart failure hospitalization in subjects with preserved ejection fraction and coronary heart disease: longitudinal data from the Heart and Soul Study. (springer.com)
  • Mild left ventricular systolic dysfunctionLeft ventricular ejection fraction 40 % with global left ventricular hypokinesis,Myxomatousmorphology mv? (healthtap.com)
  • Ejection fraction is est.52% 2-Mild left atrial enlargement. (healthtap.com)
  • Geometry as a Confounder When Assessing Ventricular Systolic Function: Comparison Between Ejection Fraction and Strain. (uio.no)
  • Baseline values of LA passive and active emptying, LA conduit function, LA ejection fraction, and spontaneous echocontrast (SEC) in the LA and LA appendage were compared with those of 50 AF patients as well as a sex/age/cardiac risk-matched population of 70 healthy control subjects. (onlinejacc.org)
  • Results Pre-closure PFO subjects demonstrated significantly greater reservoir function as well as passive and active emptying, with significantly reduced conduit function and LA ejection fraction, when compared with AF and control patients. (onlinejacc.org)
  • In such patients left ventricular systolic function may gradually improve after electrical cardioversion. (bmj.com)
  • Seventeen patients who had successfully undergone direct current electrical cardioversion for persistent lone AF or atrial flutter were studied. (bmj.com)
  • Results were compared with a control group of 17 patients with normal findings in coronary arteriography and left ventriculography. (bmj.com)
  • Background- Abnormalities in left ventricular (LV) structure and function occur in patients with diastolic heart failure (DHF). (ovid.com)
  • All 3 patient groups had increased LA volumes and depressed LA EF, a′, and LA A strain, with no significant difference between patients with DHF and diastolic dysfunction in LA systolic function indices, LV mass, LA volumes, LV, and arterial elastance. (ovid.com)
  • Although the MAZE procedure allows for the recovery of sinus rhythm and left atrial (LA) mechanical function in the great majority of patients with chronic atrial fibrillation (AF), the effects of MAZE on the precise LA geometry and wall motion remain to be elucidated. (nih.gov)
  • We hypothesized that LA size and mechanical function in patients with chronic AF and mitral valvular disease are well restored after MAZE. (nih.gov)
  • All patients with MAZE were free of AF and other atrial arrhythmias during the follow-up period. (nih.gov)
  • Further studies with the use of multislice computed tomography are needed to sequentially evaluate LA function after MAZE in patients with and without mitral valve surgery. (nih.gov)
  • Evaluate the effect of dronedarone versus placebo (standard therapy) in slowing the progression of adverse left atrial remodeling in patients with atrial fibrillation (AF) following 12 months of treatment. (clinicaltrials.gov)
  • Left atrial volume predicts cardiovascular events in patients originally diagnosed with lone atrial fibrillation: three-decade follow-up," European Heart Journal , vol. 26, no. 23, pp. 2556-2561, 2005. (hindawi.com)
  • Extensive ablation during PVAI does not cause deterioration in LA function, and may cause long-term improvement, especially in patients with higher AF burden. (nih.gov)
  • Prevention of the processes of left atrial (LA) remodeling associated with atrial fibrillation and heart failure especially in elderly hypertensive patients (HT) may have a major public health impact. (ahajournals.org)
  • We assessed the hypothesis that strong lipophilic statin (pitavastatin) has a beneficial effect on LA structure and function in elderly hypertensive patients by preventing left ventricular (LV) hypertrophy through pleiotropic effect. (ahajournals.org)
  • In this state-of-the-art paper, the author reviews the methods used to assess left atrial size and function and discusses their role in predicting cardiovascular events in general and referral populations and in patients with atrial fibrillation, cardiomyopathy, ischemic heart disease, and valvular heart disease. (onlinejacc.org)
  • Efficacy of Dofetilide in the Treatment of Atrial Fibrillation-Flutter in Patients With Reduced Left Ventricular Function. (acc.org)
  • Furthermore, this is the largest study to date demonstrating the survival advantage of sinus rhythm among patients with AF/Fl and left ventricular dysfunction. (acc.org)
  • The response of the left ventricle to pacing-induced changes in heart rate and the atrioventricular (A-V) relation was examined with equilibrium gated radionuclide ventriculography in 20 patients who had normal ventricular function after surgery for recurrent supraventricular tachycardia. (ucl.ac.uk)
  • In the other 10 patients similar determinations were made during sequential A-V and simultaneous ventricular and atrial (V/A) pacing, both at rates of 100 and 160 beats/min. (ucl.ac.uk)
  • The aim of this study was to investigate atrial conduction times and left atrial mechanical functions, the noninvasive predictors of atrial fibrillation, in prediabetic patients with impaired fasting glucose (IFG) and impaired glucose tolerance (IGT). (kjim.org)
  • In the prediabetic patients, the atrial conduction times and P wave dispersion on surface electrocardiographic were longer before the development of overt diabetes. (kjim.org)
  • In addition, the left atrial mechanical functions were impaired secondary to a deterioration in the diastolic functions in the prediabetic patients. (kjim.org)
  • It is well known that, as for most cardiovascular disorders, diabetes is an independent risk factor for atrial fibrillation (AF), and that the risk of AF is 1.4 to 2.1 times greater in patients with diabetes than the normal population [ 1 ]. (kjim.org)
  • This study investigated LA conduction times and LA mechanical functions that are predictors of AF and discussed possible mechanisms of AF development in patients with IFG and IGT at a prediabetic stage. (kjim.org)
  • A consecutive group of patients with chronic hypertension but without significant valvular disease or prior MI underwent clinically-indicated CMR for assessment of left ventricular (LV) function, myocardial ischemia, or viability. (biomedcentral.com)
  • In hypertensive patients at risk for left ventricular diastolic dysfunction, a decreased contribution of LA contractile function to ventricular filling during diastole is strongly predictive of adverse cardiac events and death. (biomedcentral.com)
  • While evidence exists that LA enlargement is a strong predictor of adverse cardiovascular outcomes in selected populations, there is little data regarding the prognostic implication of altered left atrial contractile function in patients with chronic hypertension at risk of diastolic dysfunction. (biomedcentral.com)
  • Accordingly, this study aims to test the hypothesis that altered LA contractile emptying functions as measured by cine CMR can provide strong prognostic information in patients with chronic hypertension, beyond left atrial volume and other known risk predictors in this population. (biomedcentral.com)
  • Patients were referred either for a) evaluation for myocardial ischemia with stress CMR or b) assessment of regional and global left ventricular function and myocardial mass. (biomedcentral.com)
  • METHODS AND RESULTS: A total of 369 patients with STEMI but without atrial fibrillation or HF who were treated with primary percutaneous coronary intervention were prospectively enrolled in the period between September 2006 and December 2008. (regionh.dk)
  • The aim of our study is to evaluate the LA function in patients with IDA by 2D-STE. (biomedcentral.com)
  • 2D-STE could evaluate the LA function in patients with IDA. (biomedcentral.com)
  • Leong, D & Dokainish, H 2014, ' Left atrial volume and function in patients with atrial fibrillation ', Current Opinion in Cardiology , vol. 29, no. 5, pp. 437-444. (edu.au)
  • Left atrial (LA) enlargement and dysfunction are related to clinical course in patients with hypertrophic cardiomyopathy (HCM). (cdc.gov)
  • Sameh Refaat Hassa Allam ,Abdel Aziz Rezk Hassan Sheredah ,Mohammad Al Deftar ,Ahmad Kamal Mohammad Hashem , Strain/strain rate imaging of impaired left atrial function in patients with metabolic syndrome, Egypt. (who.int)
  • Currently, risk stratification of AF patients for the occurrence of stroke is based on clinical scores that do not include LA remodeling and function in their algorithms. (onlinejacc.org)
  • BACKGROUND: Patients with mitral stenosis (MS) and heart failure (HF) are characterized by changes in the left atrial (LA) function and activation of the apoptotic process. (ox.ac.uk)
  • The purpose of the present study was the evaluation of the effect of mitral valve replacement on the LA function, on inflammatory process and apoptotic markers in patients with MS and HF. (ox.ac.uk)
  • Objective: The aim of this study was to determine the role of left-sided mechanical parameters in postoperative atrial fibrillation (POAF) in patients undergoing coronary artery bypass grafting (CABG). (acibadem.edu.tr)
  • AIMS: We aimed to investigate whether left atrial (LA) markers from cardiovascular magnetic resonance (CMR) were able to predict atrial fibrillation (AF) in elderly patients with risk factors for stroke. (regionh.dk)
  • We sought whether LA booster pump function was associated with arrhythmias in patients undergoing primary prevention implantable cardioverter-defibrillator (ICD) implantation for non-ischaemic dilated cardiomyopathy (NICM), independent of global longitudinal strain (GLS) and mechanical dispersion (MD). (edu.au)
  • Left ventricular EF (59.2 ± 2.5% patients vs. 60.1 ± 2.1% controls), E/A, E/E' were similar between the two groups. (biomedcentral.com)
  • RT3DE may be a novel technique for the evaluation of LA function in asymptomatic patients with b-Thalassemia Major. (biomedcentral.com)
  • SR imaging is reliable in assessing LA function in MS patients . (bvsalud.org)
  • The aim of this study was to evaluate the effects of atorvastatin on left atrial (LA) function in paroxysmal atrial fibrillation patients. (geneticsmr.com)
  • Fifty-eight paroxysmal atrial fibrillation patients were divided into two groups (treatment and control groups). (geneticsmr.com)
  • Thromboembolism is one of the most important complications of MS, especially when it is associated with atrial fibrillation (AF).Patients with sinus rhythm (SR) are also sussceptible to this complication when it is associated with left atrial appendage (LAA) dysfunction .LAA dysfunction is an independent predictor of thromboembolism in mitral stenosis. (who.int)
  • The aim of the study LA-EU-01 was to examine the safety and the feasibility of the LAmbreTM Left Atrial Appendage Closure System in patients with non-valvular paroxymal, persistent or perm. (bioportfolio.com)
  • Comparison of Amplatzer Amulet and Watchman Device in Patients Undergoing Left Atrial Appendage Closure. (bioportfolio.com)
  • Left atrial appendage closure (LAAC) is an emerging therapeutic option in non-valvular atrial fibrillation (NVAF) patients with high thromboembolic and bleeding risks. (bioportfolio.com)
  • This study will evaluate thrombogenicity in patients undergoing left atrial appendage closure using the WATCHMAN device. (bioportfolio.com)
  • Percutaneous left atrial appendage (LAA) closure (placement of an occluder to close the appendage) is a novel procedure for stroke prevention in patients suffering from atrial fibrillation. (bioportfolio.com)
  • LA function was analysed using strain derived from speckle tracking in sinus rhythm patients (n = 83). (nih.gov)
  • These findings support the relationship of LA dysfunction with HFPEF, suggesting that the analysis of LA function may be useful in sinus rhythm patients with new-onset dyspnoea. (nih.gov)
  • The contribution of progressive left atrial (LA) enlargement to elevated pulmonary capillary wedge pressure (PCWP) in patients with WHO Group II pulmonary hypertension (PH) has not been well studied. (springer.com)
  • Patients with CHF commonly have atrial fibrillation or flutter (AF), which is frequently associated with, may be a marker for, and may be the mechanism of, ischemic strokes. (scirp.org)
  • 2006) ACC/AHA/ESC 2006 Guidelines for the Management of Patients with Atrial Fibrillation: A Report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines and European Society of Cardiology Committee for Practice Guidelines (Writing Committee to Revise the 2001 Guidelines for the Management of Patients with Atrial Fibrillation): Developed in Collaboration with the European Heart Rhythm Association and the Heart Rhythm Society. (scirp.org)
  • Stroke Risk in Atrial Fibrillation Working Group (2008) Comparison of 12 Risk Stratification Schemes to Predict Stroke in Patients with Nonvalvular Atrial Fibrillation. (scirp.org)
  • The CABANA Trial is designed to test the hypothesis that the treatment strategy of left atrial catheter ablation for the purpose of eliminating atrial fibrillation (AF) will be superior to current state-of-the-art therapy with either rate control or rhythm control drugs for decreasing the incidence of the composite endpoint of total mortality, disabling stroke, serious bleeding, or cardiac arrest in patients with untreated or incompletely treated AF. (strokecenter.org)
  • Percutaneous left atrial catheter ablation for the purpose of eliminating AF is superior to current state-of-the-art therapy with either rate or rhythm control drugs for reducing total mortality in patients with untreated or incompletely treated AF. (strokecenter.org)
  • Echocardiographic LA volumes (LAVs), mitral valve early (MV-E) and late (MV-A) peak flow velocities, and mitral atrioventricular plane tissue-Doppler early (TD-e ') and late (TD-a ') peak velocities were obtained in 320 patients with acute myocardial infarction (AMI) free from atrial fibrillation and more than moderate valvular disease. (kb.se)
  • Audit and qualitative study of patients with atrial fibrillation and an educational intervention for patients judged eligible for antithrombotic treatment. (bmj.com)
  • 56 patients with a history of atrial fibrillation. (bmj.com)
  • Out of 13 239 patients, 132 had a history of atrial fibrillation of which 100 were at risk of thromboembolism. (bmj.com)
  • Despite the efficacy of antithrombotic treatment in preventing stroke in patients with atrial fibrillation, 1 community surveys report a low uptake of such treatment. (bmj.com)
  • We searched the practice's computer database for patients for whom a diagnosis of atrial fibrillation had been recorded and also for all patients who had been prescribed digoxin. (bmj.com)
  • 2014 AHA/ACC/HRS guideline for the management of patients with atrial fibrillation: a report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines and the Heart Rhythm Society. (medscape.com)
  • Left Atrial Dysfunction in Patients With Patent Foramen Ovale and Atrial Septal Aneurysm: An Alternative Concurrent Mechanism for Arterial Embolism? (onlinejacc.org)
  • To test the contribution of significant left atrial (LA) dysfunction as alternative mechanism for arterial embolization in patients with patent foramen ovale (PFO), the baseline values of LA functional parameters of 98 consecutive patients with previous stroke (mean age 37 ± 12.5 years, 58 women) were compared with those of 50 atrial fibrillation patients as well as a sex/age/cardiac risk-matched population of 70 healthy control subjects. (onlinejacc.org)
  • Objectives We postulate that, in patients with large patent foramen ovales (PFO) and atrial septal aneurysms (ASA), left atrial (LA) dysfunction simulating "atrial fibrillation (AF)-like" pathophysiology might represent an alternate mechanism in the promotion of arterial embolism. (onlinejacc.org)
  • A further case-control study will assess markers of left atrial function in patients with PAF and their matched controls. (strokecenter.org)
  • Prevalence of Non-Left Anterior Descending Septal Perforator Culprit in Patients With Hypertrophic Cardiomyopathy Undergoing Alcohol Septal Ablation. (rochester.edu)
  • All patients will be monitored regularly for side effects and blood tests will be obtained to monitor serum electrolytes levels and renal function. (anzctr.org.au)
  • S ), and atrial contraction (LA A ) were measured. (ovid.com)
  • SR at systole and atrial contraction in HT with statin was significantly increased associated with dilation of LA. LA volume and function in HT with statin were comparable to control (Table). (ahajournals.org)
  • This was mainly achieved by increasing atrial contraction (A-wave), maintaining cardiac output by increasing heart rate. (bgu.ac.il)
  • Maximum, minimum and pre-atrial contraction (pre-A) LA volumes (ml/m2) were 21.2 ± 5.5, 7.8 ± 2.5, and 11.0 ± 3.1, respectively. (bvsalud.org)
  • LA SR curves were similarly obtained to determine the peak positive strain rate (SRs) during left ventricle systole, the first negative peak strain rate (SRe) during early diastole and the second negative peak strain rate (SRa) during atrial contraction. (sonopath.com)
  • and (3) volume before atrial active contraction (LApreA) obtained from the last frame before mitral valve reopening or at time of the P wave on the surface electrocardiogram. (biomedcentral.com)
  • B. Hoit, "Assessment of echocardiographic left atrial size: how accurate do we need to be? (hindawi.com)
  • We tested the hypothesis that LA function index (LAFI), an echocardiographic index of LA structure and function, may better characterize adverse LA remodeling and predict incident AF and CVD than existing measures. (physiciansweekly.com)
  • Left atrial function during pregnancy: a three-dimensional echocardiographic study. (bgu.ac.il)
  • However, whether echocardiographic parameters of LA function, such as LAEF, LAi and MinLAVI, are superior to LAVI for predicting prognosis following STEMI is unknown. (regionh.dk)
  • All subjects underwent conventional echocardiographic examination and assessment of LA function by speckle tracking. (who.int)
  • We acquired 2D echocardiographic cineloops from the left apical 4-chamber view optimized for the LA, and analyzed atrial longitudinal strain (St) and strain rate (SR) in 27 dogs (10 healthy dogs and 17 dogs with MMVD - 5 ACVIM Stage B1, 5 Stage B2 and 7 Stage C). (sonopath.com)
  • Strain echocardiographic assessment of left atrial function predicts recurrence of atrial fibrillation. (uio.no)
  • Echocardiographic left atrial diameter (LAD) has been documented to be an independent predictor of adverse cardiovascular outcomes in various populations. (medsci.org)
  • LA diameter (LAD), LA systolic and diastolic areas, and left atrial fractional area change (LFAC) were assessed by TTE. (nih.gov)
  • Methods: We studied pregnant women in early third trimester (III-E = gestational age 26-33 weeks), in late third trimester (III-L = gestational age 34-40 weeks), and control nonpregnant women (C). Two-dimensional (2D-Echo) and RT3DE were used to study 3D left atrial (LA) systolic and diastolic stroke volumes and index (LASVI, LAEDVI), emptying fraction, left ventricular and LA cavities. (bgu.ac.il)
  • What are the morbidity and mortality risks associated with atrial fibrillation (Afib) (AF)? (medscape.com)
  • [4] It may also start as other forms of arrhythmia such as atrial flutter that then transform into AF. (wikipedia.org)
  • [4] A-fib and atrial flutter resulted in 193,300 deaths in 2015, up from 29,000 in 1990. (wikipedia.org)
  • The evidence that these modalities can predict who will develop atrial fibrillation, who will achieve sustained sinus rhythm after cardioversion or catheter ablation, and who will have thromboembolic risk will be reviewed. (edu.au)
  • Left Ventricular Systolic Function Assessed by Global Longitudinal Strain is Impaired in Atrial Fibrillation Compared to Sinus Rhythm. (rochester.edu)
  • This propsective study aims to compare the diagnostic yield of a Personal Heart Rhythm Monitor (PHRM) with an automated cardiac event recorder (ACER) to detect paroxysmal Atrial Fibrillation PAF). (strokecenter.org)
  • The diagnostic yield of a Personal Heart Rhythm Monitor (PHRM), used for 3 months, compared to an automated cardiac event recorder (ACER), used for 1 week, to detect all episodes of paroxysmal atrial fibrillation. (strokecenter.org)
  • The diagnostic yield of a Personal Heart Rhythm Monitor (PHRM), used for 3 months, compared to an automated cardiac event recorder (ACER), used for 1 week, to detect prolonged episodes of paroxysmal atrial fibrillation (defined as greater than 12 hours). (strokecenter.org)
  • Progressive left ventricular (LV) diastolic dysfunction due to hypertension (HTN) alters left atrial (LA) contractile function in a predictable manner. (biomedcentral.com)
  • While increased LA size is a marker of LV diastolic dysfunction and has been shown to be predictive of adverse cardiovascular outcomes, the prognostic significance of altered LA contractile function is unknown. (biomedcentral.com)
  • Left Ventricular (LV) diastolic dysfunction as a consequence of chronic hypertension is a prevalent condition associated with significant morbidity and mortality. (biomedcentral.com)
  • Among three-dimensional volumes and indices, left atrial active emptying fraction may be an early index of LA dysfunction in the specific patient population. (biomedcentral.com)
  • Metabolic syndrome (MS) predisposes to left ventricular dysfunction and heart failure , however, alterations in left atrial (LA) function in MS are unknown. (bvsalud.org)
  • Strain analysis may therefore be more sensitive in detecting subclinical atrial dysfunction with alterations in strain rate parameters observed before traditional parameters. (bmj.com)
  • Dilated cardiomyopathy (DCM) is characterized by left or bilateral ventricular dilation and systolic dysfunction without rational conditions, which can lead to progressive heart failure and sudden cardiac death. (springermedizin.de)
  • Furthermore, advances in catheter ablation procedures used for the treatment of drug-refractory atrial fibrillation require the need for detailed knowledge of left atrial and pulmonary venous morphology as well of atrial wall characteristics. (hindawi.com)
  • Special interest is paid to the utility of these rapidly involving noninvasive imaging methods before and after atrial fibrillation ablation. (hindawi.com)
  • Although pulmonary vein antrum isolation (PVAI) may cure atrial fibrillation (AF) and improve left atrial (LA) function, the effect of extensive LA ablation on LA function is not well known. (nih.gov)
  • By contrast, novel therapeutic options such as radiofrequency catheter ablation techniques and transcatheter closure of the left atrial appendage (LAA) demand advanced imaging to maximize patient safety and procedural outcomes. (onlinejacc.org)
  • We also compared the changes in the left atrial volumes and left atrial volume index (LAVI) after PVC ablation. (elsevier.com)
  • Catheter ablation for atrial fibrillatio. (cumhuriyet.edu.tr)
  • Efficacy and Safety of Figure-of-Eight Suture for Hemostasis After Radiofrequency Catheter Ablation for Atrial Fibrillation. (nih.gov)
  • Automated Ablation Annotation Algorithm Reduces Re-conduction of Isolated Pulmonary Vein and Improves Outcome After Catheter Ablation for Atrial Fibrillation. (nih.gov)
  • The (Catheter Ablation Versus Anti-arrhythmic Drug Therapy for Atrial Fibrillation Trial) CABANA Trial has the overall goal of establishing the appropriate roles for medical and ablative intervention for atrial fibrillation (AF). (strokecenter.org)
  • The change in left atrial volume from end-systole to end-diastole was 24 +/- 7.6 ml or 13.5 +/- 4.3 ml/m2, which represented 37 +/- 12.9% of left ventricular stroke volume. (biomedsearch.com)
  • Left atrial mechanical functions were evaluated before and after PMV, including left atrial passive emptying volume, LA passive emptying fraction, conduit volume, left ventricular stroke volume, LA active emptying volume, LA active emptying fraction, LA total emptying volume and LA total emptying fraction. (biomedsearch.com)
  • Left atrial volume in the prediction of first ischemic stroke in an elderly cohort without atrial fibrillation," Mayo Clinic Proceedings , vol. 79, no. 8, pp. 1008-1014, 2004. (hindawi.com)
  • Significantly higher phasic indexed LAVs and indexed active LA stroke volume (pump function) and lower strain values for LA reservoir and conduit function were noted in AS cases (Fig 2). (ahajournals.org)
  • In 1909, Welch (4) noted that cardiovascular stroke associated with AF was due to left atrial appendage (LAA) thrombi and that this was the most common site for thrombus formation in the setting of AF (5) . (onlinejacc.org)
  • At 100 beats/min, loss of atrial transport with simultaneous V/A pacing resulted in a small reduction in end-diastolic volume from a baseline value of -9.0 +/- 1.9 percent (p less than 0.01) and a nonsignificant reduction in stroke volume of -3.7 +/- 1.6 percent. (ucl.ac.uk)
  • During simultaneous V/A pacing at 160 beats/min, the reduction in end-diastolic and stroke volumes from the baseline value was -26.6 +/- 3.8 percent and -28.8 +/- 4.3 percent, respectively (both p less than 0.01), but was significantly smaller (-16.1 +/- 3.6 percent and -19.2 +/- 4.1 percent, respectively [p less than 0.05]) when atrial transport was maintained during sequential A-V pacing at the same heart rate. (ucl.ac.uk)
  • During simultaneous V/A pacing at 160 beats/min, two thirds of the reduction in end-diastolic and stroke volumes from the baseline value was due to the increment in heart rate as assessed from sequential A-V pacing and the other third was due to loss of atrial transport. (ucl.ac.uk)
  • Atrial fibrillation (AF) and stroke are important major health problems that share common risk factors and frequently coexist. (onlinejacc.org)
  • Left atrial (LA) remodeling is an important underlying substrate for AF and stroke. (onlinejacc.org)
  • Atrial fibrillation (AF) and stroke are highly prevalent conditions that share common risk factors and frequently coexist (1) . (onlinejacc.org)
  • BACKGROUND: Abnormal P-terminal force in lead V 1 (PTFV 1 ) is associated with an increased risk of heart failure, stroke, atrial fibrillation, and death. (elsevier.com)
  • BACKGROUND: Impaired left atrial (LA) mechanical function is present in hypertension and likely contributes to various complications, including atrial arrhythmias, stroke, and heart failure. (umassmed.edu)
  • This association could underlie the increased risk of atrial fibrillation and stroke seen with the use of beta-blockers (as opposed to other antihypertensive agents) demonstrated in recent trials. (umassmed.edu)
  • Then, to calculate end-systolic and end-diastolic atrial and ventricular volumes, a modified Simpson's rule formula was used. (biomedsearch.com)
  • The other left atrial volumes were not altered after PMV. (biomedsearch.com)
  • Children with significant AS have abnormal LA function with higher phasic LA volumes, higher LA pump function, and lower strain-derived reservoir and conduit LA function. (ahajournals.org)
  • The left atrial volumes were calculated by the disk method. (kjim.org)
  • Calculation of LA volumes used in determining LA emptying functions was performed using the biplane area-length method. (biomedcentral.com)
  • Echocardiographically, LA volumes were measured at mitral valve opening (Vmax), at the onset of left atrial systole (P wave of the electrocardiogram, Vp) and at the mitral valve closure (Vmin). (ox.ac.uk)
  • CONCLUSION: The risk of AF, including asymptomatic AF, increases significantly with increasing LA volumes and worsening LA function. (regionh.dk)
  • From the derived values, left atrial active and passive emptying volumes, as well as the respective emptying fractions were calculated. (biomedcentral.com)
  • PPaV 1 and PTFV 1 were associated with an increase in LA volumes and decrease in LA emptying fraction and LA reservoir function. (elsevier.com)
  • Phasic left atrial volumes and fractions were calculated. (bmj.com)
  • LA volumes and reservoir function are associated with subclinical cerebrovascular disease: the CABL (Cardiovascular Abnormalities and Brain Lesions) study. (springer.com)
  • Recent findings suggest that left atrial (LA) function is more strongly related to adverse prognosis than LA volumes. (kb.se)
  • We aimed to evaluate the associations between LA volumes and Doppler filling indices with LA function. (kb.se)
  • Although the clinical impact of left atrial appendage (LAA) leaks still requires confirmation, the open pouch with residual flow resulting from incomplete LAA closure may promote blood sta. (bioportfolio.com)
  • The early increase in conduit volume and the decrease in left atrial presystolic volume indicate that PMV has favorable effects on atrial reservoir and conduit functions. (biomedsearch.com)
  • Data are sufficient to recommend evaluation of left atrial volume in certain populations, and although analysis of atrial reservoir, conduit, and booster pump function trails in that regard, the gap is rapidly closing. (onlinejacc.org)
  • Conduit function is influenced by atrial compliance and is reciprocally related to reservoir function but by necessity is closely related to LV relaxation and compliance. (onlinejacc.org)
  • SR during ventricular systole (LA-SRs) represents LA reservoir function, and SR during early ventricular diastole (LA-SRe) represents LA conduit function. (elsevier.com)
  • P=0.039), indicating impaired LA conduit function. (umassmed.edu)
  • conduit function i.e. (jcdronline.org)
  • Successful BMV leads to early improvement in left atrial reservoir and conduit functions, without significantly affecting left atrial pump function. (jcdronline.org)
  • Left atrial volume: a powerful predictor of survival after acute myocardial infarction," Circulation , vol. 107, no. 17, pp. 2207-2212, 2003. (hindawi.com)
  • OBJECTIVES: To assess the comparative effectiveness of left atrial (LA) functional parameters (left atrial emptying fraction (LAEF), left atrial expansion index (LAi) and minimal left atrial volume index (MinLAVI)) with that of LA volume index (LAVI) in predicting heart failure (HF) and death following ST-elevated myocardial infarction (STEMI). (regionh.dk)
  • Regional myocardial work by cardiac magnetic resonance and non-invasive left ventricular pressure: A feasibility study in left bundle branch block. (uio.no)
  • Mechanism of abnormal septal motion in left bundle branch block: Role of left ventricular wall interactions and myocardial scar. (uio.no)
  • Normal reference ranges from 11 to 41 weeks' gestation of fetal left modified myocardial performance index by conventional Doppler with the use of stringent criteria for delimitation of the time periods. (springermedizin.de)
  • Left ventricular myocardial mass determination by contrast enhanced colour Doppler compared with magnetic resonance imaging. (rochester.edu)
  • and ATRIAL FIBRILLATION), direct conduction block via the Bachmann's bundle and concomitant left atrial enlargement. (bioportfolio.com)
  • After excluding significant mitral regurgitation, LA enlargement was also associated with increased V-wave amplitude, indicative of decreased atrial compliance. (springer.com)
  • What Are Some Possible Causes of Left Atrial Enlargement? (reference.com)
  • Heart function improved by up to 25 percent in a trial using gene therapy to reverse cardiac damage from congestive heart failure in a large animal model, Mount Sinai researchers report. (mountsinai.org)
  • Our data suggest that STE might be useful in assessing LA function in dogs with MMVD, and might potentially differentiate dogs with severe subclinical disease from dogs with congestive heart failure. (sonopath.com)
  • In addition, the development of new interventional transcatheter procedures for AF, mitral valve repair, atrial septal defect closure, and LAA occlusion may result in intentional or unintentional instrumentation of the LAA. (onlinejacc.org)
  • Less common features include an atrial septal defect, increased muscle tone or skeletal abnormalities. (wikipedia.org)
  • Prediction of cardiovascular outcomes with left atrial size: is volume superior to area or diameter? (hindawi.com)
  • Clinical utility and prognostic value of left atrial volume assessment by cardiovascular magnetic resonance in non-ischaemic dilated cardiomyopathy," European Journal of Heart Failure , vol. 15, no. 6, pp. 660-670, 2013. (hindawi.com)
  • The author examines the ability of left atrial size and function to predict cardiovascular outcomes. (onlinejacc.org)
  • The resurgence of interest in atrial size and function has enhanced our understanding of the atrial contributions to cardiovascular performance in health and disease. (onlinejacc.org)
  • Among these measurements, maximal left atrial volume (LAV) indexed to body surface area (LAVi) is most strongly associated with cardiovascular disease and is the most sensitive in predicting cardiovascular outcomes and providing uniform and accurate risk stratification (3) . (onlinejacc.org)
  • Association of Left Atrial Function Index with Atrial Fibrillation and Cardiovascular Disease: The Framingham Offspring Study. (physiciansweekly.com)
  • Left atrial (LA) size, a marker of atrial structural remodeling, is associated with increased risk for atrial fibrillation (AF) and cardiovascular disease (CVD). (physiciansweekly.com)
  • He is author or coauthor of numerous publications related to secondhand smoke and tobacco control, as well as many papers on cardiovascular function and biostatistics. (ucsf.edu)
  • The global peak atrial longitudinal strain and strain rate of systolic LV (GLSs, GLSRs) as well as early and late diastolic LV strain rate (GLSRe, GLSRa) curves of LA were acquired in each LA segment from basal segment to top segment of LA by 2D-STE. (biomedcentral.com)
  • Transmitral (TMF), left atrial appendage (LAA), and pulmonary venous (PVF) Doppler flows were measured by TEE. (nih.gov)
  • Finally, atrial booster pump function reflects the magnitude and timing of atrial contractility but is dependent on the degree of venous return (atrial pre-load), LV end-diastolic pressures (atrial afterload), and LV systolic reserve. (onlinejacc.org)
  • These LA functions mechanically facilitate the transition between flow through the pulmonary venous circulation and the intermittent filling of the left ventricle [ 6 , 7 ]. (kjim.org)
  • It can be also estimated using various imaging techniques or other pressure readings such as PULMONARY CAPILLARY WEDGE PRESSURE (an estimate of left atrial pressure) and CENTRAL VENOUS PRESSURE (an estimate of right atrial pressure). (bioportfolio.com)
  • In conclusion, a reduced atrial function was associated with smaller LA reservoir volume, larger LA transit volume, lower TD-a ', a non-linear decrease in MV-A and a non-linear increase in E/A. Our findings are likely a reflection of the adaptation to sustain LV filling volume and counteracting a rise in pulmonary venous pressure in face of an enhanced LV end-diastolic pressure. (kb.se)
  • As a result, there is left ventricular hypertrophy (HYPERTROPHY, LEFT VENTRICULAR) because the right ventricle is absent or not functional. (bioportfolio.com)
  • The aortic valve is the valve that connects the heart (left ventricle, a pumping chamber) with the aorta (the blood vessel that carries blood throughout the body. (healthtap.com)
  • Left and right ventricle performance parameters were good. (springermedizin.de)
  • The tube is inserted into a left ventricle of a heart where the frame is ejected from the tube. (google.ca)
  • IMSEAR at SEARO: Role of Mitral Annular Systolic Velocity in The Evaluation of Left Atrial Appendage Function in Mitral Stenosis. (who.int)
  • Majumder A A S, Tanveer M S, Reza A Q M, Chowdhury A W, Shahabuddin M. Role of Mitral Annular Systolic Velocity in The Evaluation of Left Atrial Appendage Function in Mitral Stenosis. (who.int)
  • This review article discusses the role of cardiac magnetic resonance and computed tomography in assessment of left atrial size, its normal and abnormal morphology, and function. (hindawi.com)
  • The left atrial contractile function indices increased as CMVD evolved. (bvsalud.org)
  • Except for the atrial fraction, the left atrial contractile function indices correlated with the left ventricular filling pressure indices. (bvsalud.org)
  • LA function indices were obtained by multimodality tissue tracking using 2- and 4-chamber long-axis images. (elsevier.com)
  • Left ventricular end-systolic volume is a more sensitive marker of acute response to cardiac resynchronization therapy than contractility indices: Insights from an experimental study. (uio.no)
  • LA booster pump function was an independent and incremental predictor of arrhythmias in NICM over GLS and MD, and may aid better risk stratification in this population. (edu.au)
  • This is the first study using a novel vector for gene therapy to improve heart function in non-ischemic heart failure. (mountsinai.org)
  • METHODS AND RESULTS: We studied 212 subjects with hypertension and without heart failure or atrial fibrillation. (umassmed.edu)
  • AF may also worsen heart failure in individuals who are dependent on the atrial component of the cardiac output. (medscape.com)
  • Risk assessment for incident heart failure in individuals with atrial fibrillation. (framinghamheartstudy.org)
  • In chronic atrial fibrillation (AF) left ventricular function may gradually diminish as a result of an intrinsic tachycardiomyopathy. (bmj.com)
  • The electromechanical delay parameters were measured from the onset of the P wave on the surface electrocardiogram to the onset of the atrial systolic wave on tissue Doppler imaging from septum, lateral, and right ventricular annuli. (kjim.org)
  • Parameters of LA reservoir function i.e. (jcdronline.org)
  • Importantly, age-related changes in global atrial systolic strain rate and early diastolic strain rate occurred a decade before corresponding changes in atrial phasic volume parameters. (bmj.com)
  • Conclusion Atrial strain and strain rate can be used to quantify atrial phasic function and appear to be altered before traditional parameters with ageing. (bmj.com)
  • Parameters of thrombosis and platelet function, as well as other bi. (bioportfolio.com)
  • SUMMARY: Although existing evidence is promising, the clinical role of cardiac imaging to predict atrial fibrillation occurrence, atrial fibrillation recurrence after treatment, and thromboembolism from atrial fibrillation remains to be confirmed in large-scale studies and clinical trials. (edu.au)
  • Early effects of percutaneous mitral valvuloplasty on left atrial mechanical functions. (biomedsearch.com)
  • However, left atrial mechanical functions immediately after PMV have not been extensively evaluated yet. (biomedsearch.com)
  • The aim of this study was to evaluate the effects of PMV on left atrial mechanical functions. (biomedsearch.com)
  • However, chronic AF associated with mitral valve disease deteriorates LA mechanical function diffusely throughout the LA wall. (nih.gov)
  • Left atrial mechanical functions were calculated. (kjim.org)
  • 023). Conclusion: LAA exclusion seems to improve mechanical function of the LA and results in reverse LA remodeling. (elsevier.com)
  • Rheumatic mitral stenosis (MS) is associated with progressive impairment of left atrial (LA) mechanical functions. (jcdronline.org)
  • Mechanical effects on right ventricular function from left bundle branch block and cardiac resynchronization therapy. (uio.no)
  • Numerous studies have clearly demonstrated the prognostic value of left atrial volume for long-term outcome. (hindawi.com)
  • The interatrial and left atrial electromechanical delay were significantly longer in prediabetic group compared to the controls. (kjim.org)
  • Left atrial active emptying volume (LAAEV) and fraction (LAAEF) were significantly higher in the prediabetics than the controls. (kjim.org)
  • In sequential Cox proportional hazards models, A -wave, E / A ratio, and GLS were significantly associated with outcomes, independent of age, sex, and cardiac resynchronization therapy defibrillator or left bundle branch block. (edu.au)
  • CONCLUSIONS: Beta-blocker use is significantly associated with impaired LA function in hypertension. (umassmed.edu)
  • End-systolic left atrial volume (mean +/- standard deviation) was 37 +/- 11.7 ml or 21 +/- 6.6 ml/m2. (biomedsearch.com)
  • This allowed volume measurement of early diastolic filling fraction (EDF), diastasis filling fraction (DF), and additional filling fraction (AFF) relative to the left ventricular filling volume. (bmj.com)
  • LA volume and booster function were quantitatively evaluated by multislice computed tomography at 17.9+/-10.0 months (MAZE group) and 15.3+/-13.6 months (CABG group) postoperatively. (nih.gov)
  • In both groups, LA booster function was inversely correlated with LA maximal volume. (nih.gov)
  • Left atrial volume: important risk marker of incident atrial fibrillation in 1655 older men and women," Mayo Clinic Proceedings , vol. 76, no. 5, pp. 467-475, 2001. (hindawi.com)
  • Left atrial (LA) function by volume and strain analysis in children has been little studied. (ahajournals.org)
  • LA volume and function in HT with statin were more preserved than HT without statin despite no difference in LDL cholesterol, blood pressure and antihypertensive drug use. (ahajournals.org)
  • For example, although reservoir function is governed by atrial compliance during ventricular systole (and, to a lesser extent, by atrial contractility and relaxation), it is influenced by descent of the LV base during systole and by LV end-systolic volume (1) . (onlinejacc.org)
  • Although the reasons responsible for this renaissance are multifactorial and include the use of left atrial (LA) volume as a biomarker integrating the magnitude and duration of diastolic LV function and the development of sophisticated, noninvasive indexes of LA size and function, the increasingly recognized importance of LA size and function in determining prognosis and risk stratification is critical and is the focus of this state-of-the-art paper. (onlinejacc.org)
  • 53% women), we related LA diameter and LAFI (derived from the LA emptying fraction, left ventricular outflow tract velocity time integral, and indexed maximal LA volume) to incidence of AF and CVD on follow-up. (physiciansweekly.com)
  • Influence of heart rate and atrial transport on left ventricular volume and function: relation to hemodynamic changes produced by supraventricular arrhythmia. (ucl.ac.uk)
  • Cardiac magnetic resonance imaging (CMR) can quantify left atrial volume and emptying functions with sufficient temporal and spatial resolution and excellent reproducibility. (biomedcentral.com)
  • LA Vol: Left Atrial Volume. (biomedcentral.com)
  • O índice do diâmetro atrial esquerdo, o índice de volume atrial esquerdo e a relação átrio esquerdo / aorta correlacionam-se, positivamente, com a velocidade da onda E e com a relação E/TRIV, que são importantes índices de função diastólica. (bvsalud.org)
  • Left atrial volume and function assessed. (regionh.dk)
  • Long-term outcomes of secondary atrial fibrillation in the community: the Framingham Heart Study. (medscape.com)
  • In this review, we present the current data regarding LAA anatomy, LAA function, and LAA imaging using the currently available noninvasive imaging modalities. (onlinejacc.org)
  • PURPOSE OF REVIEW: This review of emerging approaches to left atrial imaging in atrial fibrillation is relevant because there has been considerable recent development in the noninvasive characterization of left atrial structure and function. (edu.au)
  • Sun X, Yang C, Zhou G, Wang C. Acquired left ventricular-right atrial communication following mitral valve replacement. (springermedizin.at)
  • Amirghofran AA, Emaminia A. Left ventricular-right atrial communication (Gerbode-type defect) following mitral valve replacement. (springermedizin.at)
  • Left atrial (LA) function helps to preserve cardiac output and to control pulmonary capillary wedge pressure in the setting of left ventricular (LV) impairment, but little is known about the contribution of the LA function to ventricular arrhythmia. (edu.au)
  • The left atrial appendage (LAA) in the setting of non-valvular atrial fibrillation (NVAF) is the predominant location for intracardiac thrombus formation. (bioportfolio.com)
  • This, in turn, can lead to development of thrombus, most commonly in the left atrial appendage. (medscape.com)
  • Moreover, the release of such biologically active molecules also promotes endothelial function impairment, disturbs the haemostatic and fibrinolytic systems, and produces alterations in platelet function affecting the initiation, progression, and stabilization of thrombus formation upon atherosclerotic plaque rupture. (diva-portal.org)
  • and Chirinos, Julio A., "Beta-Blocker Use Is Associated With Impaired Left Atrial Function in Hypertension" (2017). (umassmed.edu)
  • 9 Increased left ventricular mass is considered as subclinical organ damage in people with hypertension. (bmj.com)
  • We aimed to use strain / strain rate (SR) imaging to investigate the effect of MS on LA function. (bvsalud.org)
  • Objective Strain and strain rate measure local deformation of the myocardium and have been used to evaluate phasic atrial function in various disease states. (bmj.com)
  • Left ventricular strain rate showed no differences between non-HF and HFPEF groups, but both groups showed differences with the HFREF group. (nih.gov)