Heart Ventricles
Echocardiography
Blood Flow Velocity
Ventricular Function, Left
Cardiac Volume
Echocardiography, Doppler
Models, Cardiovascular
Mitral Valve Prolapse
Cardiac-Gated Imaging Techniques
Echocardiography, Three-Dimensional
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)
Mitral Valve Insufficiency
Dogs
Stroke Volume
Hemodynamics
Echocardiography, Doppler, Color
Heart Sounds
The sounds heard over the cardiac region produced by the functioning of the heart. There are four distinct sounds: the first occurs at the beginning of SYSTOLE and is heard as a "lubb" sound; the second is produced by the closing of the AORTIC VALVE and PULMONARY VALVE and is heard as a "dupp" sound; the third is produced by vibrations of the ventricular walls when suddenly distended by the rush of blood from the HEART ATRIA; and the fourth is produced by atrial contraction and ventricular filling.
Electrocardiography
Recording of the moment-to-moment electromotive forces of the HEART as projected onto various sites on the body's surface, delineated as a scalar function of time. The recording is monitored by a tracing on slow moving chart paper or by observing it on a cardioscope, which is a CATHODE RAY TUBE DISPLAY.
Echocardiography, Doppler, Pulsed
Torsion, Mechanical
Ventricular Function, Right
Pulse
Ventricular Pressure
The pressure within a CARDIAC VENTRICLE. Ventricular pressure waveforms can be measured in the beating heart by catheterization or estimated using imaging techniques (e.g., DOPPLER ECHOCARDIOGRAPHY). The information is useful in evaluating the function of the MYOCARDIUM; CARDIAC VALVES; and PERICARDIUM, particularly with simultaneous measurement of other (e.g., aortic or atrial) pressures.
Heart Septum
Cardiomyopathy, Hypertrophic
A form of CARDIAC MUSCLE disease, characterized by left and/or right ventricular hypertrophy (HYPERTROPHY, LEFT VENTRICULAR; HYPERTROPHY, RIGHT VENTRICULAR), frequent asymmetrical involvement of the HEART SEPTUM, and normal or reduced left ventricular volume. Risk factors include HYPERTENSION; AORTIC STENOSIS; and gene MUTATION; (FAMILIAL HYPERTROPHIC CARDIOMYOPATHY).
Myocardial Bridging
Tricuspid Valve
Cardiac Catheterization
Pulsatile Flow
Heart Murmurs
Heart sounds caused by vibrations resulting from the flow of blood through the heart. Heart murmurs can be examined by HEART AUSCULTATION, and analyzed by their intensity (6 grades), duration, timing (systolic, diastolic, or continuous), location, transmission, and quality (musical, vibratory, blowing, etc).
Ventricular Dysfunction, Left
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.
Fetal Heart
Pericardium
A conical fibro-serous sac surrounding the HEART and the roots of the great vessels (AORTA; VENAE CAVAE; PULMONARY ARTERY). Pericardium consists of two sacs: the outer fibrous pericardium and the inner serous pericardium. The latter consists of an outer parietal layer facing the fibrous pericardium, and an inner visceral layer (epicardium) resting next to the heart, and a pericardial cavity between these two layers.
Aortic Valve
Myocardium
Cardiac Output
Stress, Mechanical
Amyl Nitrite
Image Processing, Computer-Assisted
Heart Block
Impaired conduction of cardiac impulse that can occur anywhere along the conduction pathway, such as between the SINOATRIAL NODE and the right atrium (SA block) or between atria and ventricles (AV block). Heart blocks can be classified by the duration, frequency, or completeness of conduction block. Reversibility depends on the degree of structural or functional defects.
Papillary Muscles
Doppler Effect
Observer Variation
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).
Magnetic Resonance Imaging, Cine
A type of imaging technique used primarily in the field of cardiology. By coordinating the fast gradient-echo MRI sequence with retrospective ECG-gating, numerous short time frames evenly spaced in the cardiac cycle are produced. These images are laced together in a cinematic display so that wall motion of the ventricles, valve motion, and blood flow patterns in the heart and great vessels can be visualized.
Heart Diseases
Tricuspid Valve Insufficiency
Reproducibility of Results
The statistical reproducibility of measurements (often in a clinical context), including the testing of instrumentation or techniques to obtain reproducible results. The concept includes reproducibility of physiological measurements, which may be used to develop rules to assess probability or prognosis, or response to a stimulus; reproducibility of occurrence of a condition; and reproducibility of experimental results.
Reference Values
Aortic Valve Stenosis
Elasticity Imaging Techniques
Non-invasive imaging methods based on the mechanical response of an object to a vibrational or impulsive force. It is used for determining the viscoelastic properties of tissue, and thereby differentiating soft from hard inclusions in tissue such as microcalcifications, and some cancer lesions. Most techniques use ultrasound to create the images - eliciting the response with an ultrasonic radiation force and/or recording displacements of the tissue by Doppler ultrasonography.
Echocardiography, Transesophageal
Magnetic Resonance Imaging
Cardiac Pacing, Artificial
Ultrasonography, Doppler
Ultrasonography applying the Doppler effect, with frequency-shifted ultrasound reflections produced by moving targets (usually red blood cells) in the bloodstream along the ultrasound axis in direct proportion to the velocity of movement of the targets, to determine both direction and velocity of blood flow. (Stedman, 25th ed)
Rheology
Counterpulsation
A technique for assisting the circulation by decreasing the afterload of the left ventricle and augmenting the diastolic pressure. It may be achieved by intra-aortic balloon, or by implanting a special pumping device in the chest, or externally by applying a negative pressure to the lower extremities during cardiac systole.
Mitral Valve Stenosis
Narrowing of the passage through the MITRAL VALVE due to FIBROSIS, and CALCINOSIS in the leaflets and chordal areas. This elevates the left atrial pressure which, in turn, raises pulmonary venous and capillary pressure leading to bouts of DYSPNEA and TACHYCARDIA during physical exertion. RHEUMATIC FEVER is its primary cause.
Pulmonary Artery
Imaging, Three-Dimensional
The process of generating three-dimensional images by electronic, photographic, or other methods. For example, three-dimensional images can be generated by assembling multiple tomographic images with the aid of a computer, while photographic 3-D images (HOLOGRAPHY) can be made by exposing film to the interference pattern created when two laser light sources shine on an object.
Mitral Valve Annuloplasty
Pressure
Sheep
Image Interpretation, Computer-Assisted
Heart Valve Prosthesis
Cardiomyopathy, Dilated
Dobutamine
Models, Anatomic
Pulmonary Veins
Tetralogy of Fallot
A combination of congenital heart defects consisting of four key features including VENTRICULAR SEPTAL DEFECTS; PULMONARY STENOSIS; RIGHT VENTRICULAR HYPERTROPHY; and a dextro-positioned AORTA. In this condition, blood from both ventricles (oxygen-rich and oxygen-poor) is pumped into the body often causing CYANOSIS.
Pacemaker, Artificial
Ultrasonography, Prenatal
Biomechanical Phenomena
Hypertrophy, Left Ventricular
Myocardial Ischemia
A disorder of cardiac function caused by insufficient blood flow to the muscle tissue of the heart. The decreased blood flow may be due to narrowing of the coronary arteries (CORONARY ARTERY DISEASE), to obstruction by a thrombus (CORONARY THROMBOSIS), or less commonly, to diffuse narrowing of arterioles and other small vessels within the heart. Severe interruption of the blood supply to the myocardial tissue may result in necrosis of cardiac muscle (MYOCARDIAL INFARCTION).
Arrhythmias, Cardiac
Image Enhancement
Signal Processing, Computer-Assisted
Prospective Studies
Vascular Resistance
Aortic Valve Insufficiency
Finite Element Analysis
Heart Conduction System
Cardiomegaly
Enlargement of the HEART, usually indicated by a cardiothoracic ratio above 0.50. Heart enlargement may involve the right, the left, or both HEART VENTRICLES or HEART ATRIA. Cardiomegaly is a nonspecific symptom seen in patients with chronic systolic heart failure (HEART FAILURE) or several forms of CARDIOMYOPATHIES.
Heart Failure
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.
Cardiomyopathies
A group of diseases in which the dominant feature is the involvement of the CARDIAC MUSCLE itself. Cardiomyopathies are classified according to their predominant pathophysiological features (DILATED CARDIOMYOPATHY; HYPERTROPHIC CARDIOMYOPATHY; RESTRICTIVE CARDIOMYOPATHY) or their etiological/pathological factors (CARDIOMYOPATHY, ALCOHOLIC; ENDOCARDIAL FIBROELASTOSIS).
Feasibility Studies
Sensitivity and Specificity
Coronary Disease
Ventricular Remodeling
Predictive Value of Tests
In screening and diagnostic tests, the probability that a person with a positive test is a true positive (i.e., has the disease), is referred to as the predictive value of a positive test; whereas, the predictive value of a negative test is the probability that the person with a negative test does not have the disease. Predictive value is related to the sensitivity and specificity of the test.
Ultrasonography
Gestational Age
Regression Analysis
Procedures for finding the mathematical function which best describes the relationship between a dependent variable and one or more independent variables. In linear regression (see LINEAR MODELS) the relationship is constrained to be a straight line and LEAST-SQUARES ANALYSIS is used to determine the best fit. In logistic regression (see LOGISTIC MODELS) the dependent variable is qualitative rather than continuously variable and LIKELIHOOD FUNCTIONS are used to find the best relationship. In multiple regression, the dependent variable is considered to depend on more than a single independent variable.
Cardiotonic Agents
Isoproterenol
Algorithms
Myocytes, Cardiac
Coronary Angiography
Swine
Any of various animals that constitute the family Suidae and comprise stout-bodied, short-legged omnivorous mammals with thick skin, usually covered with coarse bristles, a rather long mobile snout, and small tail. Included are the genera Babyrousa, Phacochoerus (wart hogs), and Sus, the latter containing the domestic pig (see SUS SCROFA).
Aging
Myocardial Infarction
Linear Models
Computer Simulation
Magnetic Resonance Angiography
Hypertension
Carotid Arteries
Calcium
A basic element found in nearly all organized tissues. It is a member of the alkaline earth family of metals with the atomic symbol Ca, atomic number 20, and atomic weight 40. Calcium is the most abundant mineral in the body and combines with phosphorus to form calcium phosphate in the bones and teeth. It is essential for the normal functioning of nerves and muscles and plays a role in blood coagulation (as factor IV) and in many enzymatic processes.
Pregnancy
Altered vascular reactivity following partial nephrectomy in the rat: a possible mechanism of the blood-pressure-lowering effect of heparin. (1/3311)
BACKGROUND: This study was designed to assess whether the antihypertensive effect of heparin in rats after renal mass reduction (RMR) is related to changes in nitric oxide activity, and to study in vitro the altered behaviour of resistance-sized arteries induced by chronic administration of heparin. METHODS: Male Wistar rats were assigned to one of two experimental protocols. In the first protocol, RMR rats received heparin (250 units/day s.c.) and tail systolic blood pressure (SBP) was measured weekly for 4 weeks. In a subgroup, urinary nitrate excretion (UNO3) and in vitro vascular reactivity of isolated perfused mesenteric arterial beds were measured 2 weeks after RMR. The second protocol assessed whether inhibition of NO synthesis with L-NAME (70 mg/l added to the drinking water) prevents the blood-pressure-lowering effect of heparin. RESULTS: In untreated RMR rats SBP increased from 111+/-3 mmHg to 127+/-5 mmHg at 2 weeks and 139+/-5 mmHg at 4 weeks. In contrast, in RMR rats treated with heparin, SBP was 114 +/-3 mmHg at 2 weeks and 115+/-4 mmHg at 4 weeks (P<0.05 for both). Treatment with L-NAME increased SBP both in untreated and heparin-treated RMR groups. Two weeks after nephrectomy daily urinary nitrate increased significantly more in RMR rats treated with heparin than in untreated RMR rats (22+/-2 vs 14.2+/-2.3 micromol/day, P<0.05). In vitro studies performed at 2 weeks showed that vessels of untreated RMR rats had a blunted vasodilator response to acetylcholine that was restored to levels similar to that of controls in the heparin-treated group. CONCLUSIONS: These results suggest that, in rats after renal ablation, heparin may exert its antihypertensive effect, at least in part, by affecting the altered behaviour of resistance vessels during the development phase of hypertension. Increased NO production may contribute to this effect. (+info)Ambulatory blood pressure monitoring and progression in patients with IgA nephropathy. (2/3311)
BACKGROUND: Hypertension is a recognized marker of poor prognosis in IgA nephropathy. METHODS: The present study investigated the prevalence of white-coat hypertension, the diurnal rhythm of blood pressure (BP), the effectiveness of antihypertensive drug therapy, and the effect of the above on the progression of the kidney disease in IgA nephropathy. One hundred twenty-six IgA nephropathy patients were selected consecutively for 24-h ambulatory blood pressure monitoring (ABPM). Fifty-five patients were normotensive and 71 were treated hypertensives. Their antihypertensive drugs were angiotensin-converting enzyme inhibitors (ACEI) alone or in combination with calcium-channel blockers (CCB). RESULTS: The mean night-time BP of normotensives (108+/-9/67+/-6 mmHg) was significantly lower than their day-time BP (125+/-8/82+/-7 mmHg, P<0.05). There was no significant difference between the mean day-time and night-time BP in hypertensive patients (125+/-9/82+/-7 mmHg vs 128+/-10/85+/-9 mmHg). The circadian variation of BP was preserved ('dippers') in 82% of the normotensive and 7% of the hypertensive patients (P<0.001). There were 10 'white-coat hypertensives' among the patients classified as normotensives with ABPM (mean office blood pressure 149+/-7/96+/-8 mmHg, 24-h blood pressure 127+/-6/83+/-5 mmHg, P<0.05) and 14 among treated hypertensives (mean office BP 152+/-8/98+/-6 mmHg, 24-h BP 130+/-4/85+/-8 mmHg, P<0.05). There was no difference in mean day-time BP among normotensive and treated hypertensive patients (125+/-8/81+/-5 mmHg vs 128+/-10/85+/-9 mmHg). Hypertensives had significantly higher night-time BP (125+/-9/85+/-9 mmHg) than normotensives (108+/-9/67+/-6 mmHg, P<0.001). There was no difference in serum creatinine levels among the different groups at the time of the ABPM. However, thirty-six+/-4.1 months after the ABPM, hypertensive patients (n=52) had higher serum creatinine levels (124+/-32 micromol/l) than at the time of the ABPM (101+/-28 micromol/l). The serum creatinine of normotensive patients (n=43) did not change during the follow-up period. 'Non-dipper' normotensives (n=10) had significantly higher serum creatinine levels at the end of the follow-up period than at its beginning (106+/-17 micromol/l vs 89+/-18 micromol/l, P<0.05). There was no increase in serum creatinine of 'dipper' normotensives. The mean serum creatinine of 'white-coat hypertensives' was significantly higher at the end of the study period than at its beginning. CONCLUSIONS: There is no diurnal blood pressure variation in most of the hypertensive IgA nephropathy patients. ACEI and CCB treatment have better effect on day-time than night-time hypertension. The lack of the circadian rhythm and 'white-coat hypertension' seems to accelerate the progression of IgA nephropathy. (+info)Effects of calcium-channel blockade in older patients with diabetes and systolic hypertension. Systolic Hypertension in Europe Trial Investigators. (3/3311)
BACKGROUND: Recent reports suggest that calcium-channel blockers may be harmful in patients with diabetes and hypertension. We previously reported that antihypertensive treatment with the calcium-channel blocker nitrendipine reduced the risk of cardiovascular events. In this post hoc analysis, we compared the outcome of treatment with nitrendipine in diabetic and nondiabetic patients. METHODS: After stratification according to center, sex, and presence or absence of previous cardiovascular complications, 4695 patients (age, > or =60 years) with systolic blood pressure of 160 to 219 mm Hg and diastolic pressure below 95 mm Hg were randomly assigned to receive active treatment or placebo. Active treatment consisted of nitrendipine (10 to 40 mg per day) with the possible addition or substitution of enalapril (5 to 20 mg per day) or hydrochlorothiazide (12.5 to 25 mg per day) or both, titrated to reduce the systolic blood pressure by at least 20 mm Hg and to less than 150 mm Hg. In the control group, matching placebo tablets were administered similarly. RESULTS: At randomization, 492 patients (10.5 percent) had diabetes. After a median follow-up of two years, the systolic and diastolic blood pressures in the placebo and active-treatment groups differed by 8.6 and 3.9 mm Hg, respectively, among the diabetic patients. Among the 4203 patients without diabetes, systolic and diastolic pressures differed by 10.3 and 4.5 mm Hg, respectively, in the two groups. After adjustment for possible confounders, active treatment was found to have reduced overall mortality by 55 percent (from 45.1 deaths per 1000 patients to 26.4 deaths per 1000 patients), mortality from cardiovascular disease by 76 percent, all cardiovascular events combined by 69 percent, fatal and nonfatal strokes by 73 percent, and all cardiac events combined by 63 percent in the group of patients with diabetes. Among the nondiabetic patients, active treatment decreased all cardiovascular events combined by 26 percent and fatal and nonfatal strokes by 38 percent. In the group of patients receiving active treatment, reductions in overall mortality, mortality from cardiovascular disease, and all cardiovascular events were significantly larger among the diabetic patients than among the nondiabetic patients (P=0.04, P=0.02, and P=0.01, respectively). CONCLUSIONS: Nitrendipine-based antihypertensive therapy is particularly beneficial in older patients with diabetes and isolated systolic hypertension. Thus, our findings do not support the hypothesis that the use of long-acting calcium-channel blockers may be harmful in diabetic patients. (+info)Restriction of placental and fetal growth in sheep alters fetal blood pressure responses to angiotensin II and captopril. (4/3311)
1. We have measured arterial blood pressure between 115 and 145 days gestation in normally grown fetal sheep (control group; n = 16) and in fetal sheep in which growth was restricted by experimental restriction of placental growth and development (PR group; n = 13). There was no significant difference in the mean gestational arterial blood pressure between the PR (42.7 +/- 2.6 mmHg) and control groups (37.7 +/- 2.3 mmHg). Mean arterial blood pressure and arterial PO2 were significantly correlated in control animals (r = 0.53, P < 0.05, n = 16), but not in the PR group. 2. There were no changes in mean arterial blood pressure in either the PR or control groups in response to captopril (7.5 microg captopril min-1; PR group n = 7, control group n = 6) between 115 and 125 days gestation. After 135 days gestation, there was a significant decrease (P < 0.05) in the fetal arterial blood pressure in the PR group but not in the control group during the captopril infusion (15 microg captopril min-1; PR group n = 7, control group n = 6). 3. There was a significant effect (F = 14.75; P < 0.001) of increasing doses of angiotensin II on fetal diastolic blood pressure in the PR and control groups. The effects of angiotensin II were different (F = 8.67; P < 0.05) in the PR and control groups at both gestational age ranges. 4. These data indicate that arterial blood pressure may be maintained by different mechanisms in growth restricted fetuses and normally grown counterparts and suggests a role for the fetal renin-angiotensin system in the maintenance of blood pressure in growth restricted fetuses. (+info)The diameter of the common femoral artery in healthy human: influence of sex, age, and body size. (5/3311)
PURPOSE: To determine the relevance of dilatations of the common femoral artery (CFA), knowledge of the normal CFA diameter is essential. The diameter of the CFA in healthy male and female subjects of different ages was investigated. METHODS: The diameter of the CFA was measured in 122 healthy volunteers (59 male, 63 female; 8 to 81 years of age) with echo-tracking B-mode ultrasound scan. The influence of age, sex, height, weight, body surface area (BSA), and systolic blood pressure was analyzed by means of a multiple regression model. RESULTS: The CFA increased steadily in diameter throughout life. From 25 years onwards, the diameter was larger in men than in women. Significant correlations were found between the CFA diameter and weight (r = 0.58 and r = 0.57 in male and female subjects, respectively; P <.0001), height (r = 0.49 and r = 0.54 in male and female subjects, respectively; P <.0001), and BSA (r = 0.60 and r = 0.62 in male and female subjects, respectively; P <.0001). Age and BSA were used to create a model for prediction of the CFA diameter (r = 0.71 and r = 0.77 in male and female subjects, respectively; P <.0001). CONCLUSION: The diameter of the CFA increases with age, initially during growth but also in adults. This is related to age, body size, and sex male subjects have larger arteries than female subjects. It is now possible to predict the normal CFA diameter, and nomograms that may be used in the study of aneurysmal disease are presented. (+info)Acute exercise can improve cardioprotection without increasing heat shock protein content. (6/3311)
The aim of this study was to determine the effects of acute bouts of exercise on myocardial recovery after ischemia and heat shock protein expression. Adult female Sprague-Dawley rats were divided into five groups: 1) 1-day run (1DR; n = 6) and 2) 3-day run (3DR; n = 7), in which rats ran for 100 min at a speed of 20 m/min up a 6 degrees grade for 1 or 3 consecutive days; 3) 1-day cold run (1CR), in which rats ran the same as 1DR but with wet fur at 8 degrees C, which prevented an elevation of core temperature (n = 8); 4) heat shock sedentary (HS), in which rats had their core temperatures raised to 42 degrees C one time for 15 min (n = 5); and 5) sedentary control (n=15). Cardiac function was analyzed 24 h after the last treatment using an isolated, working heart model. Nonpaced hearts were initially perfused under normoxic conditions, then underwent 17 min of global, normothermic (37 degrees C) ischemia, and, finally, were allowed to recover for 30 min under normoxic conditions. The concentration of the 72-kDa heat shock protein (HSP 72) was measured in each left ventricle. Compared with that in the sedentary group, recovery of cardiac output x systolic pressure (CO x SP) was enhanced (P < 0.05) in all treatment groups when the postischemic value was covaried with the preischemic value. No differences in CO x SP were found (P > 0.05) between the following groups: 1DR vs. 3DR, 1DR vs. HS, and 1DR vs. 1CR. Heat shock protein concentration was significantly greater (P < 0.05) than that in the sedentary controls in HS, 1DR, and 3DR groups, but not for 1CR. The concentration of HSP 72 was not significantly correlated with postischemic CO x SP (R2 = 0.197, P > 0.05). We conclude that acute bouts of exercise can produce cardioprotective effects without an elevation of HSP 72. (+info)Echocardiography-derived left ventricular end-systolic regional wall stress and matrix remodeling after experimental myocardial infarction. (7/3311)
OBJECTIVES: We tested the hypothesis that regional end-systolic left ventricular (ESLV) wall stress is associated with extracellular matrix remodeling activity after myocardial infarction (MI). BACKGROUND: Increased left ventricular (LV) wall stress is a stimulus for LV enlargement, and echocardiography can be used to estimate regional wall stress. A powerful validation of a noninvasive method of estimating wall stress would be predicting cellular responses after a MI. METHODS: Echocardiographic images were obtained in rats 1, 7, 14 or 21 days after coronary ligation (n = 11) or sham surgery (n = 5). End-systolic left ventricular wall stress was calculated by finite element analysis in three regions (infarcted, noninfarcted and border) from short-axis images. Matrix metalloproteinase-9 (MMP-9) and macrophage density were determined by immunohistochemistry, and positive cells were counted in high power fields (hpf). RESULTS: Average ESLV wall stress was higher in rats with MI when compared to shams irrespective of time point (p < 0.01), and ESLV wall stress in the infarcted regions increased with time (25.1 +/- 5.9 vs. 69.9 +/- 4.4 kdyn/cm2, day 1 vs. 21; p < 0.01). Matrix metalloproteinase-9 expression was higher in infarcted and border regions when compared to noninfarcted regions (22.1 vs. 25.7 vs. 0.10 cells/hpf, respectively; p < 0.01). Over all regions, ESLV wall stress was associated with MMP-9 (r = 0.76; p < 0.001), macrophage density (r = 0.72; p < 0.001) and collagen content (r = 0.67; p < 0.001). End-systolic left ventricular wall stress was significantly higher when MMP-9 positive cell density was greater than 10 cells/hpf (45+/-20 vs. 14+/-10 kdyn/cm2; p < 0.001). CONCLUSIONS: Regional increases in ESLV wall stress determined by echocardiography-based structural analysis are associated with extracellular matrix degradation activity. (+info)Chordal force distribution determines systolic mitral leaflet configuration and severity of functional mitral regurgitation. (8/3311)
OBJECTIVES: The purpose of this study was to investigate the impact of the chordae tendineae force distribution on systolic mitral leaflet geometry and mitral valve competence in vitro. BACKGROUND: Functional mitral regurgitation is caused by changes in several elements of the valve apparatus. Interaction among these have to comply with the chordal force distribution defined by the chordal coapting forces (F(c)) created by the transmitral pressure difference, which close the leaflets and the chordal tethering forces (FT) pulling the leaflets apart. METHODS: Porcine mitral valves (n = 5) were mounted in a left ventricular model where leading edge chordal forces measured by dedicated miniature force transducers were controlled by changing left ventricular pressure and papillary muscle position. Chordae geometry and occlusional leaflet area (OLA) needed to cover the leaflet orifice for a given leaflet configuration were determined by two-dimensional echo and reconstructed three-dimensionally. Occlusional leaflet area was used as expression for incomplete leaflet coaptation. Regurgitant fraction (RF) was measured with an electromagnetic flowmeter. RESULTS: Mixed procedure statistics revealed a linear correlation between the sum of the chordal net forces, sigma[Fc - FT]S, and OLA with regression coefficient (minimum - maximum) beta = -115 to -65 [mm2/N]; p < 0.001 and RF (beta = -0.06 to -0.01 [%/N]; p < 0.001). Increasing FT by papillary muscle malalignment restricted leaflet mobility, resulting in a tented leaflet configuration due to an apical and posterior shift of the coaptation line. Anterior leaflet coapting forces increased due to mitral leaflet remodeling, which generated a nonuniform regurgitant orifice area. CONCLUSIONS: Altered chordal force distribution caused functional mitral regurgitation based on tented leaflet configuration as observed clinically. (+info)
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Leaning About Diastolic Hypertension Issues
What is the normal blood pressure for 62 years old?
PDF] Heart (Quickstudy: Academic) | Free eBook Share
Gabriela Monroy
Note systole, investigations, men, non-rotated exudation prophylaxis. - CSPAZAR.COM
Help deciphering my Echocardiogram results from Monday. - Heart & Cardiovascular Disease - HealingWell.com Forum
Google Libros
Diastole
Marcel Berger
ISBN 3-540-11658-3 Berger, Marcel: Systoles et applications selon Gromov. (French) [Systoles and their applications according ... Berger, M.: What is... a Systole? Notices of the AMS 55 (2008), no. 3, 374-376. online text Berger, Marcel (2003). A Panoramic ...
Systolic geometry
Berger, M.: Systoles et applications selon Gromov. (French. French summary) [Systoles and their applications according to ... More details appear at systoles of surfaces. The deepest result in the field is Gromov's inequality for the homotopy 1-systole ... The systole of a compact metric space X is a metric invariant of X, defined to be the least length of a noncontractible loop in ... The actual term "systole" itself was not coined until a quarter century later, by Marcel Berger. This line of research was, ...
Mikhail Katz
ISBN 0-8176-3898-9 Berger, M.: What is... a Systole? Notices of the AMS 55 (2008), no. 3, 374-376. Katz & Katz (2010). Stewart ... a Systole?" lists the book (Katz, 2007) as one of two books he cites in systolic geometry. More recently Katz also contributed ...
Introduction to systolic geometry
Berger, M.: Systoles et applications selon Gromov. (French. French summary) [Systoles and their applications according to ... In geometry, a systole is a distance which is characteristic of a compact metric space which is not simply connected. It is the ... The actual term systole itself was not coined until a quarter century later, by Marcel Berger. This line of research was, ... Berger, M.: What is... a Systole? Notices of the AMS 55 (2008), no. 3, 374-376. Buser, P.; Sarnak, P.: On the period matrix of ...
Heart failure with preserved ejection fraction
Volumetric definition of the heart in systole was first described by Adolph Fick as cardiac output. Fick may be readily and ... During diastole, the ventricular pressure falls from the peak reached at the end of systole. When this pressure falls below the ... This is termed partial persistent systole. Ischemia may manifest in distinct ways, either as a result of increasing tissue ... Mathematics describing the relationship between the ratio of Systole to Diastole in accepted terms of End Systolic Volume to ...
Glossary of differential geometry and topology
Systole, least length of a noncontractible loop. Tangent bundle, the vector bundle of tangent spaces on a differentiable ...
Diastole
This beginning of the atrial systole is known as the atrial kick-see Wiggers diagram. The atrial kick does not supply the ... That is, for a typical heart rate of 75 beats per minute (bpm), the cycle requires 0.3 sec in ventricular systole (contraction ... Systole (medicine) Blood pressure Wiggers diagram Diastole. Merriam-Webster Online Dictionary. 24 August 2008. Widmaier, Eric P ... In summary, when the ventricles are in systole and contracting, the atria are relaxed and collecting returning blood. When, in ...
Hawking (band)
Systole [1] Ghettoblaster Magazine, June 24, 2015. [2] MusicBox Pete June 29, 2015 "Hawking Introduces Us To Math Pop". Baeble ...
Hurwitz quaternion order
Katz, Mikhail G.; Schaps, Mary; Vishne, Uzi (2007), "Logarithmic growth of systole of arithmetic Riemann surfaces along ... and Vishne to construct a family of Hurwitz surfaces satisfying an asymptotic lower bound for the systole: s y s > 4 3 log g ... see systoles of surfaces. (2,3,7) triangle group Klein quartic Macbeath surface First Hurwitz triplet Vogeler, Roger (2003), On ...
Cardiac tamponade
Note how the right atrial collapses during systole. Play media Ultrasound image of the inferior vena cava (IVC) in a person ...
Muscle tissue
This complex mechanism illustrates systole of the heart. Cardiac muscle cells, unlike most other tissues in the body, rely on ...
Wiggers diagram
Ventricular systole Cardiac diastole ECG The EKG complex. P=P wave, PR=PR interval, QRS=QRS complex, QT=QT interval, ST=ST ...
Arterial stiffness
The increased workload may also be associated with a higher heart rate, a proportionately longer duration of systole and a ... This increases the load on the heart in systole. John R. Cockcroft, notable researcher on the subject Pulse wave velocity ... is increased in stiffer arteries and consequently reflected waves will arrive at the heart earlier in systole. ...
History of lute-family instruments
Volume 1. Chisholm 1911, p. 397 harvnb error: no target: CITEREFChisholm1911 (help). "CITOLE, also spelled Systole, Cythole, ...
Ventricle (heart)
During most of the cardiac cycle, ventricular pressure is less than the pressure in the aorta, but during systole, the ... Fractional shortening (FS) is the fraction of any diastolic dimension that is lost in systole. When referring to endocardial ... During systole, the ventricles contract, pumping blood through the body. During diastole, the ventricles relax and fill with ...
Functional murmur
Occurs during systole or continuously during both systole and diastole. (Murmurs occurring only during diastole are usually ...
Citole
Volume 1. "CITOLE, also spelled Systole, Cythole, Gytolle, &c. (probably a Fr. diminutive form of cithara, and not from Lat. ...
Cardiac muscle cell
These two phases are commonly understood as systole and diastole. The rest phase is considered polarized. The resting potential ...
Blood pressure
Cardiac systole and diastole. During each heartbeat, blood pressure varies between a maximum (systolic) and a minimum ( ...
Premature atrial contraction
Supraventricular extra systole (SVES). Two PACs as seen on a rhythm strip. ...
Andreas Vesalius
Vesalius believed that cardiac systole is synchronous with the arterial pulse. He not only verified Estienne's findings on the ...
Arithmetic Fuchsian group
doi:10.1016/0022-314x(82)90028-2. Katz, M.; Schaps, M.; Vishne, U. (2007). "Logarithmic growth of systole of arithmetic Riemann ...
Mitral insufficiency
Its duration is, as the name suggests, the whole of systole. The loudness of the murmur does not correlate well with the ... will reveal a jet of blood flowing from the left ventricle into the left atrium during ventricular systole. Also, it may detect ... and comparing it with the flow out of the left ventricle through the aortic valve in ventricular systole. This method assumes ...
Uzi Vishne
Logarithmic growth of systole of arithmetic Riemann surfaces along congruence subgroups. J. Differential Geom. 76 (2007), no. 3 ...
Admittance and conductance in cardiac performance
"Volume catheter parallel conductance varies between end-systole and end-diastole". IEEE Trans Biomed Eng. 54 (8): 1480-9. doi: ...
Aortic valve
When ventricular systole ends, pressure in the left ventricle rapidly drops. When the pressure in the left ventricle decreases ... When the left ventricle contracts (systole), pressure rises in the left ventricle. When the pressure in the left ventricle ...
2,3,7) triangle group
ISBN 978-3-540-69113-6. Katz, M.; Schaps, M.; Vishne, U. (2007). "Logarithmic growth of systole of arithmetic Riemann surfaces ... as well as systoles of Fuchsian subgroups) can be calculated by means of the reduced trace in the quaternion algebra, and the ...
Hemodynamics
P I = v s y s t o l e − v d i a s t o l e v m e a n {\displaystyle PI={\frac {v_{systole}-v_{diastole}}{v_{mean}}}} Resistance ... Blood velocities in arteries are higher during systole than during diastole. One parameter to quantify this difference is the ...
Opiliones anatomy
Myofibrils are mostly arranged circularly and constrict the heart during systole. There are two valves present, an anterior ...
First Hurwitz triplet
Katz, M.; Schaps, M.; Vishne, U. (2007). "Logarithmic growth of systole of arithmetic Riemann surfaces along congruence ... The systolic ratio is the ratio of the square of the systole to the area. (2,3,7) triangle group Elkies, N. (1999). The Klein ... The lower bound on the systole as specified in [2], namely 4 3 log ( g ( Σ ) ) , {\displaystyle {\frac {4}{3}}\log(g(\Sigma ...
systole | heart function | Britannica.com
systole: Period of contraction of the ventricles of the heart that occurs between the first and second heart sounds of the ... In an ECG, atrial systole is associated with atrial depolarization, or the P wave deflection. "Systole" may also refer to the ... Systole causes the ejection of blood into the aorta and pulmonary trunk. Lasting usually 0.3 to 0.4 second, ventricular systole ... Systole, period of contraction of the ventricles of the heart that occurs between the first and second heart sounds of the ...
Systole - Everything2.com
Atrial Systole
Create healthcare diagrams like this example called Atrial Systole in minutes with SmartDraw. SmartDraw includes 1000s of ... Atrial Systole. Create healthcare diagrams like this example called Atrial Systole in minutes with SmartDraw. SmartDraw ... Atrial Systole. Changes in heart structure during atrial systole.. LifeART Collection Images Copyright © 1989-2001 by ...
Systole | Definition of Systole by Merriam-Webster
Systole definition is - a rhythmically recurrent contraction; especially : the contraction of the heart by which the blood is ... Examples of systole in a Sentence. Recent Examples on the Web The researchers found that during systole, people tended to ... Post the Definition of systole to Facebook Share the Definition of systole on Twitter ... History and Etymology for systole. Greek systolē, from systellein to contract, from syn- + stellein to send ...
Diastole vs. systole: What is the difference?
Here, we discuss the difference between diastole and systole and the risks of hypertension (high) and hypotension (low) blood ... What are diastole and systole?. Diastole is when the heart muscle relaxes and systole is when the heart muscle contracts. ... The terms diastole and systole refer to when the heart muscles relax and contract. The balance between diastole and systole ... Systole is when the heart muscle contracts.. *When the heart contracts, it pushes the blood out of the heart and into the large ...
Systole - Wikipedia
Atrial systole lasts approximately 100 ms and ends prior to ventricular systole, as the atrial muscle returns to diastole. The ... LV systole is volumetrically defined as the left ventricular ejection fraction (LVEF). Similarly, RV systole is defined as the ... left atrial systole is ended and ventricular systole is about to begin. The time variable for the left systolic cycle is ... The systole (/ˈsɪstəli/ SIST-ə-lee) is the part of the cardiac cycle during which some chambers of the heart muscle contract ...
Premature systole | Define Premature systole at Dictionary.com
Systole (disambiguation) - Wikipedia
Systole may refer to: Systole (medicine), a term describing the contraction of the heart Systolic array, a term used in ... surfaces Also see Introduction to systolic geometry This disambiguation page lists articles associated with the title Systole. ... computer architecture Systolic geometry, a term used in mathematics In mathematics, Systoles of surfaces are systolic ...
Systole - Simple English Wikipedia, the free encyclopedia
Systole is the last stage of a heart beat. It happens right after diastole, when the heart refills with blood. During systole, ... During systole, the heart muscle gets an automatic electrical signal that tells the heart to contract (squeeze). This makes the ... Blood causes the most pressure against the walls of the arteries when it is being pushed out during systole). The lowest ... "Systole definition - Medical Dictionary definitions of popular medical terms easily defined on MedTerms". Medterms.com. ...
Systole
... on WN Network delivers the latest Videos and Editable pages for News & Events, including Entertainment, Music, Sports, ... Systole. Systole /ˈsɪstəliː/ is the part of the cardiac cycle when the ventricles contract. The term "systole" originates from ... Systole. Systole /ˈsɪstəliː/ is the part of the cardiac cycle when the ventricles contract. The term "systole" originates from ... The notion of systole. The systole of a compact metric space X is a metric invariant of X, defined to be the least length of a ...
Strain Measurement in the Left Ventricle During Systole with Deformable Image Registration | SpringerLink
... for left ventricular strain measurement during the systole using cine-gated... ... The Hyperelastic Warping solution was evolved using a series of non-tagged images in 10 phases from end-diastole to end-systole ... Strain Measurement in the Left Ventricle During Systole with Deformable Image Registration. ... Strain Measurement in the Left Ventricle During Systole with Deformable Image Registration. In: Sachse F.B., Seemann G. (eds) ...
WikiGenes - Systole
Gene context of Systole. *LV wall thickness during systole and % fractional shortening were diminished by 8-10% in Cx43- ... Energy levels at systole vs. diastole in normal hamster hearts vs. myopathic hamster hearts. Sievers, R., Parmley, W.W., James ... Atrial systole and left ventricular filling in hypertrophic cardiomyopathy: effect of verapamil. Bonow, R.O., Frederick, T.M., ... Effect of increased adrenergic activity on the relationship between electrical and mechanical systole. Boudoulas, H., Geleris, ...
Systole
Systole and diastole Synonyms, Systole and diastole Antonyms | Thesaurus.com
systole | Taber's Medical Dictionary
systole answers are found in the Tabers Medical Dictionary powered by Unbound Medicine. Available for iPhone, iPad, Android, ... In the cardiac cycle, atrial systole precedes ventricular systole, which pumps blood into the aorta and pulmonary artery. ... In the cardiac cycle, atrial systole precedes ventricular systole, which pumps blood into the aorta and pulmonary artery. ... systole is a topic covered in the Tabers Medical Dictionary. To view the entire topic, please sign in or purchase a ...
Evaluation Of Intraventricular Pressure Gradients
During Systole: A Numerical Study
... during systole: a numerical study A. Redaelli, F. Inzoli, R. Pietrabissa & P.M.... ... Evaluation of intraventricular pressure gradients during systole: a numerical study A. Redaelli, F. Inzoli, R. Pietrabissa & P. ... Experimental evidences by Pasiparidopulos have pointed out that during early systole the intraventricular pressure drop (IPD ... The impulsive nature of the blood flow during systole suggests that the intraventricular pressure gradient (IPG), needed to ...
syrinx and systole | Quattro Books
Atrial systole | definition of atrial systole by Medical dictionary
... atrial systole explanation free. What is atrial systole? Meaning of atrial systole medical term. What does atrial systole mean? ... Looking for online definition of atrial systole in the Medical Dictionary? ... Related to atrial systole: atrial diastole, Ventricular systole systole. [sis´to-le] the contraction, or period of contraction ... extra systole see extrasystole.. ventricular systole contraction of the ventricles, forcing blood into the aorta and pulmonary ...
Systole Jantung - Blood Pressure Diet Guide
Exercise and physical activity help lower blood pressure by helping you lose weight and keep your heart and blood vessels in good shape. Weight loss achieved through diet and exercise helps to control factors such as glycemia and other complications of obesity. Avoiding these complications helps to lower blood pressure and prevent high blood pressure. Consult your doctor before starting a new exercise program.. * The NHS advises people to undertake 2 ½ hours of moderate physical activity each week or 1 hour and 15 minutes of vigorous exercise. If you are not yet very active, the British Heart Foundation recommends building your exercise level from a few 10-minute sessions each day. Overconsumption of alcohol over a long period has been found to contribute to higher levels of blood pressure. It can be easy for us not to know when we drink too much.. * Tip Frozen unsweetened peach slices are an excellent alternative to fresh peaches and nectarines in case of high blood pressure. Simply defrost in ...
Systole Generale - Blood Pressure Diet Guide
Examples of a serving include a medium fruit, 1/2 cup of fresh, frozen or canned fruit, or 4 ounces of juice. Milk, yogurt, cheese and other dairy products are major sources of calcium, vitamin D and protein. But the key is to make sure that you choose low-fat or fat-free dairy products because otherwise they can be a major source of fat - and most are saturated. Examples of a serving include 1 cup of creamed milk or 1 percent of milk, 1 cup of milkow fatty yogurt, or 1 1/2 ounces of partially creamed cheese.. * With the exception of olive oil, coconut oil and sesame, I generally try to stay away from vehement oils tales. However, sesame seed oil has been popular in ancient medicines for millennia and possesses serious heart properties. Seed oil lowers blood pressure and helps protect against cardiac hypertrophy, a thickening of the heart muscle usually caused by high blood pressure. Much research is focused on the ability of sesame oil to increase potassium levels while decreasing sodium in the ...
Contribution of Synchronized Atrial Systole to Left Ventricular Contraction in the Newborn Pig Heart
Diffusion MRI Tractography of the Human Heart \(In\) \(Vivo\) at End-Diastole and End-Systole
Here we perform 3D tractography of the human heart \(in\) \(vivo\) at both end diastole and end systole. We show that fiber ... Diffusion MRI tractography of the human heart \(in\) \(vivo\) at end-diastole and end-systole. Journal of Cardiovascular ... Diffusion MRI Tractography of the Human Heart \(In\) \(Vivo\) at End-Diastole and End-Systole. ... decrease during systole. Our data suggest that myocardial fiber architecture is dynamic and is a function of both chamber ...
How to Define End-Diastole and End-Systole? | JACC: Cardiovascular Imaging
end-systole/systolic. ES-GLS. end-systolic global longitudinal strain. ES-SLS. end-systolic segmental longitudinal strain. ICC ... How to Define End-Diastole and End-Systole? Message Subject (Your Name) has forwarded a page to you from JACC: Cardiovascular ... Surrogate Parameters Used to Define End-Systole. (A) Mean error (considering the sign) ± SD; (B) mean absolute error (without ... 2009) A novel echocardiographic marker of end systole in the ischemic left ventricle: "tug of war" sign. Am J Physiol Heart ...
Left ventricular long axis function in diastolic heart failure is reduced in both diastole and systole: time for a redefinition...
Importance of Atrial Systole to Ventricular Filling Predicted by Transesophageal Echocardiography | Anesthesiology | ASA...
Importance of Atrial Systole to Ventricular Filling Predicted by Transesophageal Echocardiography Steven N. Konstadt, M.D.; ... Importance of Atrial Systole to Ventricular Filling Predicted by Transesophageal Echocardiography You will receive an email ... Importance of Atrial Systole to Ventricular Filling Predicted by Transesophageal Echocardiography. Anesthesiology 6 1990, Vol. ... Steven N. Konstadt, David L. Reich, Daniel M. Thys, Zaharia Hillel, Eric Louie; Importance of Atrial Systole to Ventricular ...
Quantitative three-dimensional cardiovascular magnetic resonance myocardial perfusion imaging in systole and diastole - Zurich...
Methods Thirty-five patients underwent 3D-perfusion CMR with data acquired at both end-systole and mid-diastole. MBF and ... Estimates of MBF are significantly different for systole and diastole at stress but diagnostic accuracy to detect CAD is high ... Methods Thirty-five patients underwent 3D-perfusion CMR with data acquired at both end-systole and mid-diastole. MBF and ... Estimates of MBF are significantly different for systole and diastole at stress but diagnostic accuracy to detect CAD is high ...
Distribution of normal human left ventricular myofiber stress at end diastole and end systole: a target for in silico design of...
Distribution of normal human left ventricular myofiber stress at end diastole and end systole: a target for in silico design of ... Download PDF Distribution of normal human left ventricular myofiber stress at end diastole and end systole: a target for in ... Distribution of normal human left ventricular myofiber stress at end diastole and end systole: a target for in silico design of ...
Relation Between Left Ventricular Diastolic Pressure and Myocardial Segment Length and Observations on the Contribution of...
Atrial systole causes a substantial increase in myocardial segment length when the ventricle is on the sensitive part of its ... Left Ventricular Diastolic Pressure and Myocardial Segment Length and Observations on the Contribution of Atrial Systole. R. J ... Left Ventricular Diastolic Pressure and Myocardial Segment Length and Observations on the Contribution of Atrial Systole ... Left Ventricular Diastolic Pressure and Myocardial Segment Length and Observations on the Contribution of Atrial Systole ...
Take your blood pressure and also somebody elses. List both the systole and diastole. Define systole, diastole, and list the...
Life-Size Human Heart Model, 5 parts with Representation of Systole - 3B Smart Anatomy - 1010006 - 3B Scientific - G01 -...
5 parts with Representation of Systole - 3B Smart Anatomy , Human Heart Models , Invest in quality with this uniquely sectioned ... Life-Size Human Heart Model, 5 parts with Representation of Systole - 3B Smart Anatomy. 239.19 € ... It shows the cardiac valves during diastole and on the base the valves are shown in systole. A dissection through the median ... Life-Size Human Heart Model, 5 parts with Representation of Systole - 3B Smart Anatomy. ...
AtrialCardiacSystolic blood prExtra systoleElectrical systoleLeft ventricularDiastole and end systoleTerms diastole and systolePrematureArterialMyocardialPeriod of contractionVentricleEjectionVentricles contractPulmonary2020OccursMitral valveVentricular pressureLastsAortaDefinitionsTerm used in mathematicsArteriesPhysiolContraction stageSearchAtriumBlood into the ventriclesAtria and ventriclesHttpsPhasePrecedesValvesMechanicalAdjectiveDictionaryContracts
Atrial32
- Atrial systole occurs toward the end of ventricular diastole, completing the filling of the ventricles. (britannica.com)
- In an ECG, atrial systole is associated with atrial depolarization, or the P wave deflection. (britannica.com)
- Create healthcare diagrams like this example called Atrial Systole in minutes with SmartDraw. (smartdraw.com)
- Changes in heart structure during atrial systole. (smartdraw.com)
- Atrial systole occurs late in ventricular diastole and represents the contraction of myocardium of the left and right atria. (wikipedia.org)
- Loss of normal electrical conduction in the heart-as seen during atrial fibrillation, atrial flutter, and complete heart block-may eliminate atrial systole completely. (wikipedia.org)
- At the start of atrial systole, during ventricular diastole, the ventricles are normally filled to about 70 - 80 percent of capacity by inflow from the atria. (wikipedia.org)
- Atrial systole lasts approximately 100 ms and ends prior to ventricular systole, as the atrial muscle returns to diastole. (wikipedia.org)
- In the cardiac cycle, atrial systole precedes ventricular systole, which pumps blood into the aorta and pulmonary artery. (tabers.com)
- The rate varies normally with the cardiac cycle, being fastest during atrial diastole and slowest during atrial systole. (thefreedictionary.com)
- Atrial systole causes a substantial increase in myocardial segment length when the ventricle is on the sensitive part of its pressure-length curve. (ahajournals.org)
- Atrial systole lasts about 0.1 seconds. (enacademic.com)
- Subsequent physiologic discharge from the SA node then finds its way through the atrial mass, eventually meeting at the atrioventricular node to be gated through the available channels from the atria to the ventricles to allow ventricular systole or [LVEF] + [RVEF]. (piglix.com)
- The atrial systole (0.1 sec) is included in the ventricular diastole, as it occurs at the end of this phase. (kypho.com)
- The atrial diastole (0.7 sec) is not considered, as it overlaps ventricular systole and diastole. (kypho.com)
- The end of diastole coincides with atrial systole. (kypho.com)
- The atrial systole lasts for 0.1 sec. (kypho.com)
- The atrial systole is not required for ventricular filling in normal heart rates. (kypho.com)
- The rapid filling phase of ventricular filling, gives the III heart sound and the atrial systole produces IV heart sound. (kypho.com)
- Systole can be divided into atrial systole in which the atria contract, and ventricular systole when the ventricles contract. (biologydictionary.net)
- Atrial systole moves blood from the atria into the ventricles, while ventricular systole moves blood out of the heart into the pulmonary and systemic circulations. (biologydictionary.net)
- Atrial systole starts just before this, caused by the destabilization of "P" on the electrocardiogram. (biologydictionary.net)
- By the end of atrial systole , the impulse reaches the atrioventricular node, which is in the right atrium. (freethesaurus.com)
- Part of the mass prolapsed through the mitral valve to the left ventricle during the atrial systole (Fig. (freethesaurus.com)
- Absent ductus venosus atrial systole (a-wave), umbilical vein pulsations, loss of movement, and oligohydramnios were the strongest predictors of stillbirth and acidemia. (freethesaurus.com)
- Atrial fibrillation is also associated with haemodynamic complications due to the generation of excessive exercise-induced tachycardia and the loss of synchronized atrial systole , which results in a reduction in cardiac output by up to 50% in octogenarians[4]. (freethesaurus.com)
- LA maximum volume (Vmax) at the end-systolic phase, LA minimum volume (Vmin) at the end-diastolic phase and LA volume before atrial systole (Vp) were measured and calculated with adjustment to body surface area. (freethesaurus.com)
- What Happens During Atrial Systole? (reference.com)
- Subsequent physiologic discharge from the SA node then finds it way through the atrial mass, eventually meeting at the atrioventicular node to be gated through the available channels from the atria to the ventricles to allow ventricular systole or [LVEF] + [RVEF]. (gutenberg.org)
- Atrial systole occurs late in ventricular diastole . (gutenberg.org)
- Atrial fibrillation represents a common electrical malady apparent during the time interval of atrial systole. (gutenberg.org)
- The cardiac cycle is divided into five phases, two of which imply a radical change of pressure in the heart: the diastole (or joint diastole) and the systole (or atrial systole). (pablocalderonsalazar.com)
Cardiac15
- Systole , period of contraction of the ventricles of the heart that occurs between the first and second heart sounds of the cardiac cycle (the sequence of events in a single heart beat). (britannica.com)
- The systole (/ˈsɪstəli/ SIST-ə-lee) is the part of the cardiac cycle during which some chambers of the heart muscle contract after refilling with blood. (wikipedia.org)
- Cardiac systole is the contraction of the cardiac muscle in response to an electrochemical stimulus to the heart's cells (cardiomyocytes). (wikipedia.org)
- Systole / ˈ s ɪ s t əl iː / is the part of the cardiac cycle when the ventricles contract. (wn.com)
- The frame after end-diastole (ED), marked by mitral valve closure (MVC), is often considered as the beginning of a new cardiac cycle, and aortic valve closure (AVC) is used to describe the end of systole (ES). (onlinejacc.org)
- Estimates of MBF are significantly different for systole and diastole at stress but diagnostic accuracy to detect CAD is high for both cardiac phases. (uzh.ch)
- It shows the cardiac valves during diastole and on the base the valves are shown in systole. (3bscientific.com)
- After reconstruction, the ungated images were retrospectively binned ("self-gated") into two cardiac phases using a region of interest based technique and deformably registered into near-systole and near-diastole. (nih.gov)
- Cardiac electrical systole is staged and first derived from sympathetic charge from the sinoatrial node (SA node). (piglix.com)
- Systole is the phase of the cardiac cycle in which the heart muscles are contracted. (biologydictionary.net)
- The following diagram shows systole in the context of the entire cardiac cycle. (biologydictionary.net)
- 1. Which of the following must follow the systole phase of the cardiac cycle in order for the heart to pump blood? (biologydictionary.net)
- While the cardiac cycle is not regulated in hagfish, the atrium and ventricle each go through periods of systole, and each go through periods of diastole. (biologydictionary.net)
- With GRE at 1.5 T, systole could be assessed in 69% of patients, and an evaluation of the whole cardiac cycle was not possible. (springer.com)
- With the SSFP sequence at 1.5 T and GRE at 3 T, an evaluation of the whole cardiac cycle was possible in 71% and 70% of the patients, respectively, and systole was assessable in all patients. (springer.com)
Systolic blood pr1
- During systole, arterial blood pressure reaches its peak (systolic blood pressure), normally about 90 to 120 mm of mercury in humans. (britannica.com)
Extra systole3
- I am 70 years old and in good shape except for what has been labelled by my GP as having an extra systole. (mayoclinic.org)
- There's a vague sense of unease and anxiety that never seems to let up and I know that life would be so much nicer without this extra systole and the ensuing constant awareness of my heart beating. (mayoclinic.org)
- Does extra systole fall in the AFib category? (mayoclinic.org)
Electrical systole2
- Electrical Systole - The nerve impulse signaling the heart muscles to contract. (biologydictionary.net)
- Electrical systole opens voltage-gated sodium, potassium and calcium channels. (gutenberg.org)
Left ventricular3
- The objective of this study was to validate a deformable image registration technique, termed Hyperelastic Warping, for left ventricular strain measurement during the systole using cine-gated nontagged MRI with strains measured from tagged MRI. (springer.com)
- Left ventricular long axis function in diastolic heart failure is reduced in both diastole and systole: time for a redefinition? (bmj.com)
- Tsuiki, K & Ritman, EL 1980, ' Direct Evidence that Left Ventricular Myocardium Is Incompressible Throughout Systole and Diastole ', The Tohoku Journal of Experimental Medicine , vol. 132, no. 1, pp. 119-120. (elsevier.com)
Diastole and end systole4
- Here we perform 3D tractography of the human heart \(in\) \(vivo\) at both end diastole and end systole. (harvard.edu)
- How to Define End-Diastole and End-Systole? (onlinejacc.org)
- The aim of this study was to examine the difference in the myocardial volume between end-diastole and end-systole in 24 human volunteers, using steady-state free precession gradient-echo cine imaging of both long- and short-axis views of the left ventricle and a newly developed three-dimensional (3D) analysis method. (umn.edu)
- Swingen, C, Wang, X & Jerosch-Herold, M 2004, ' Evaluation of myocardial volume heterogeneity during end-diastole and end-systole using cine MRI ', Journal of Cardiovascular Magnetic Resonance , vol. 6, no. 4, pp. 829-835. (umn.edu)
Terms diastole and systole2
- The terms diastole and systole refer to when the heart muscles relax and contract. (medicalnewstoday.com)
- The terms diastole and systole apply to the relaxing and contraction of heart muscles. (nccmed.com)
Premature1
- Medical Dictionary premature systole n. (drugster.info)
Arterial2
- Because the heart muscle contracts during systole, "systolic pressure" is the highest pressure in the arterial blood stream during each heart beat. (wikipedia.org)
- Note that during systole, the ventricular pressure and arterial pressure spike. (biologydictionary.net)
Myocardial2
- Regional myocardial blood flow estimates (MBFs) obtained using self-gated systole (0.64 ± 0.26 ml/min/g), self-gated diastole (0.64 ± 0.26 ml/min/g), and ECG-gated scans (0.65 ± 0.28 ml/min/g) were similar. (nih.gov)
- With the 3D analysis method, no significant variance in the myocardial volume was found (mean difference=0.1%±9.1%, p=0.88) between end-diastole (ED) and end-systole (ES), while the 2D technique yielded significantly larger values for the LV myocardial volume at ES than ED (mean difference=14.7%±16.8%, p±0.0001). (umn.edu)
Period of contraction2
- Lasting usually 0.3 to 0.4 second, ventricular systole is introduced by a very brief period of contraction, followed by the ejection phase, during which 80 to 100 cc of blood leave each ventricle. (britannica.com)
- During this cycle, the period of relaxation is called diastole and the period of contraction is called systole. (medicalnewstoday.com)
Ventricle4
- The second phase of systole sends blood from the left ventricle to the aorta and body extremities, and from the right ventricle to the lungs . (wn.com)
- The students can visually see the systole and the diastole and the contraction of the ventricle. (resources-teachers.com)
- Does the hagfish heart, which consists of one atrium and one ventricle, go through the phase of systole? (biologydictionary.net)
- When the smaller, upper atria chambers contract in the first phase of systole, they send blood down to the larger, lower ventricle chambers. (gutenberg.org)
Ejection1
- Systole causes the ejection of blood into the aorta and pulmonary trunk. (britannica.com)
Ventricles contract2
- During systole, the heart's two ventricles contract (squeeze). (wikipedia.org)
- then, as the atria start to relax, the ventricles contract (ventricular systole) and pump blood out of the heart. (medicalnewstoday.com)
Pulmonary3
- Systole is the contraction phase of the normal heart cycle during which blood is driven into the aorta and pulmonary artery. (heart.org)
- ventricular systole contraction of the ventricles, forcing blood into the aorta and pulmonary artery. (thefreedictionary.com)
- During diastole, it directs inflow from the pulmonary veins towards the mitral annulus, and during ventricular systole it retains the inflow volume until the mitral valve reopens. (bmj.com)
20201
- Quanta Magazine , 6 July 2020 Instead, the participants responded more fearfully to all the shapes that were presented at systole . (merriam-webster.com)
Occurs2
- The phase of diastole occurs after systole, in which the muscles of the heart relax. (biologydictionary.net)
- 1) A newer classification scheme for heart failure is based not on left or right side failure but rather on whether the failure occurs during systole or diastole. (english-thai.net)
Mitral valve1
- With the 3D software, commissure-commissure plane and 3 perpendicular anteroposterior (AP) planes were generated for imaging the medial, central, and lateral sides of the mitral valve (MV) during mid systole. (ahajournals.org)
Ventricular pressure1
- The fall in ventricular pressure, at the end of systole is called protodiastole. (kypho.com)
Lasts1
- The term usually refers to ventricular systole , which lasts about 0.3 seconds. (enacademic.com)
Aorta2
- 3) The reflected wave returns to the aorta during systole rather than diastole, increasing systolic work even more and reducing diastolic pressure, on which coronary flow depends. (english-thai.net)
- 4) Younger people have a highly distensible aorta, which expands during systole and minimises any subsequent rise in blood pressure. (english-thai.net)
Definitions3
- Objectives This study aimed to investigate to what extent timing definitions influence strain measurements and which surrogates are reliable and feasible to define end-diastole (ED) and end-systole (ES) during speckle-tracking (STI) analysis. (onlinejacc.org)
- Meaning and definitions of systole, translation in Thai language for systole with similar and opposite words. (english-thai.net)
- Meaning and definitions of systole, translation in Haitian language for systole with similar and opposite words. (english-dictionary.help)
Term used in mathematics2
- Systole may refer to: Systole (medicine), a term describing the contraction of the heart Systolic array, a term used in computer architecture Systolic geometry, a term used in mathematics In mathematics, Systoles of surfaces are systolic inequalities for curves on surfaces Also see Introduction to systolic geometry This disambiguation page lists articles associated with the title Systole. (wikipedia.org)
- Systole (mathematics) is a term used in mathematics. (enacademic.com)
Arteries4
- Blood causes the most pressure against the walls of the arteries when it is being pushed out during systole). (wikipedia.org)
- systole - (n.) periodic contraction of the heart and arteries, 1570s, from Gk. (enacademic.com)
- In a blood pressure measurement, the top number refers to the pressure in the arteries during systole. (biologydictionary.net)
- 5) The passive, elastic recoil between systoles maintains the blood pressure, smooths the flow of blood, and forces blood through the coronary arteries while the ventricles are filling. (english-thai.net)
Physiol1
- systole, gr. sustolê « contraction » ♦ Physiol. (enacademic.com)
Contraction stage2
- Systole" may also refer to the contraction stage of the contractile vacuole in protozoans. (britannica.com)
- Systole is the contraction stage of the heart. (futura-sciences.us)
Search1
- For your search query Thinking Out Loud Systole 2016 MP3 we have found 1000000 songs matching your query but showing only top 10 results. (mp3musicsongs.com)
Atrium1
- Sinoatrial Node - The nerve-embedded region of the right atrium which starts systole by causing the initial nerve impulse. (biologydictionary.net)
Blood into the ventricles1
- during the systole, the atria contracts, pumping blood into the ventricles and, therefore, generating a considerable increase in the pressure of the heart. (pablocalderonsalazar.com)
Atria and ventricles1
- The heart cycle consists of a systole and diastole of both the atria and ventricles. (encyclopedia.com)
Https1
- Merriam-Webster.com Dictionary , Merriam-Webster, https://www.merriam-webster.com/dictionary/systole. (merriam-webster.com)
Phase3
- The contraction phase of the ventricles is called systole . (kdnuggets.com)
- The ventricular systole is followed by a resting or filling phase that is called diastole . (kdnuggets.com)
- The cycle involves systole (the contraction phase) and diastole (the relaxation phase). (encyclopedia.com)
Precedes2
- it precedes the true or ventricular systole and is indicated by the fourth heart sound. (thefreedictionary.com)
- it precedes the true or ventricular systole. (thefreedictionary.com)
Valves4
- The ventricles now perform systole isovolumetrically, which is contraction while all valves are closed-ending the first stage of systole. (wikipedia.org)
- When the lower chambers are filled and the valves to the atria are closed, the ventricles undergo isovolumetric contraction (contraction of the ventricles while all valves are closed), marking the first stage of systole. (wn.com)
- Systole begins with the closure of AV valves. (kypho.com)
- At the beginning of systole, the closure of AV valves produces I heart sound. (kypho.com)
Mechanical3
- The electrical activity of the heart is followed by mechanical activity, which consists of contraction (systole) and relaxation (diastole). (kypho.com)
- Mechanical Systole - The actual contraction of the muscle fibers of heart tissue . (biologydictionary.net)
- Mechanical systole is the origin of the pulse . (gutenberg.org)
Adjective1
- The adjective for systole is systolic. (enacademic.com)
Dictionary2
- systole is a topic covered in the Taber's Medical Dictionary . (tabers.com)
- Taber's Online , www.tabers.com/tabersonline/view/Tabers-Dictionary/766199/all/systole. (tabers.com)
Contracts4
- Diastole is when the heart muscle relaxes and systole is when the heart muscle contracts. (medicalnewstoday.com)
- Systole is when the heart muscle contracts. (medicalnewstoday.com)
- A systolic murmur is a heart murmur heard during systole, the time the heart contracts, between the normal first and second heart sounds. (enacademic.com)
- When the heart contracts and forces the blood out of the ventricles it is known as systole. (abpischools.org.uk)