• We aimed to identify right ventricular (RV) electrophysiological parameters potentially associated with a higher risk of ventricular arrhythmias in patients with rTOF. (revespcardiol.org)
  • Right ventricular filling in dilated cardiomyopathy. (bmj.com)
  • METHODS--Stroke distances were measured by pulsed Doppler echocardiography at left ventricular outflow and left and right ventricular inflow. (bmj.com)
  • CONCLUSIONS--Enlargement of the right ventricular inflow tract in dilated cardiomyopathy, especially to more than 5 cm, is accompanied by a progressive decrease in effective tricuspid orifice area, sometimes to less than 1 cm2 and increased inflow velocities. (bmj.com)
  • Right ventricular relaxation was incoordinate in 28% of the patients studied. (bmj.com)
  • These disturbances of right ventricular filling are likely to compromise overall cardiac function independently of left ventricular disease. (bmj.com)
  • These findings were independent of right ventricular function. (elsevierpure.com)
  • The aim of this study was to test the feasibility of the assessment of right ventricular (RV) volumes and function using real-time three-dimensional (3D) transesophageal echocardiographic (TEE) imaging in patients undergoing cardiac surgery. (thoracickey.com)
  • Right ventricular (RV) dimensions and function are known to be of diagnostic and prognostic importance in patients with cardiac diseases, particularly in subjects undergoing cardiac surgery. (thoracickey.com)
  • a conventional surrogate for APD) were measured from multiple left and right ventricular (RV) endocardial sites, together with femoral artery pressure. (ox.ac.uk)
  • Reentrant, automatic, or triggered mechanisms may cause ventricular arrhythmia (VA), just as these mechanisms cause supraventricular tachycardia (SVT) and other arrhythmias. (medscape.com)
  • However, it has been associated with a risk of provoking other potentially dangerous arrhythmias, especially if used in high doses and in patients with uncorrected electrolyte imbalance or impaired renal and cardiac function. (annals.edu.sg)
  • In the light of the Cardiac Arrhythmia Suppression Trial (CAST) which suggested that class I antiarrhythmics may be linked to an increase in mortality, attention has been turned towards the use of class III drugs for the management of both atrial and ventricular arrhythmias. (annals.edu.sg)
  • Preventing ventricular arrhythmias and sudden cardiac death in adults with repaired tetralogy of Fallot: a never-ending story? (revespcardiol.org)
  • Risk stratification of ventricular arrhythmias in patients with repaired tetralogy of Fallot (rTOF) remains unresolved. (revespcardiol.org)
  • We previously demonstrated that chronic pretreatment with a thiazolidinedione peroxisome proliferator-activated receptor (PPAR)-γ activator, troglitazone, improves recovery of left ventricular (LV) function and substrate metabolism after ischemia and reperfusion, without causing arrhythmias. (diabetesjournals.org)
  • Go to Ventricular Tachycardia for complete information on this topic. (medscape.com)
  • Pediatric patients with surgical ventricular scars, such as those with postoperative ventricular tachycardia (VT) after repair of tetralogy of Fallot , are commonly cited examples of this mechanism. (medscape.com)
  • We used logistic regression modeling to identify those variables associated with an increased risk of clinical or induced ventricular tachycardia (VT), or clinical VT exclusively. (revespcardiol.org)
  • Divided into supraventricular and ventricular tachycardia. (mims.com)
  • Other heart problems that occur in ankyrin-B syndrome include irregular and uncoordinated electrical activity in the heart's upper chambers (atrial fibrillation) or lower chambers (ventricular fibrillation) and an abnormality called catecholaminergic polymorphic ventricular tachycardia (CPVT), in which an increase in the heart rate can trigger an abnormally fast and irregular heartbeat called ventricular tachycardia . (medlineplus.gov)
  • Chaotic rhythms (eg, ventricular fibrillation) are also examples of reentry mechanisms. (medscape.com)
  • We present 4 patients with atrial fibrillation treated with sotalol who developed torsade de pointes due to marked prolongation of the QT interval. (annals.edu.sg)
  • Diltiazem slows the ventricular rate in patients with a rapid ventricular response during atrial fibrillation or atrial flutter. (nih.gov)
  • Pigs that developed ventricular fibrillation had shorter QT intervals than survivors of either group. (diabetesjournals.org)
  • Acute treatment with troglitazone increases susceptibility to ventricular fibrillation during myocardial ischemia and reperfusion. (diabetesjournals.org)
  • Isolated premature ventricular contractions (PVCs) are reasonably common. (medscape.com)
  • A test was considered positive for long-QT syndrome if the absolute QT interval prolonged by ≥30 ms at 0.10 μg/kg per minute and borderline if QT prolongation was 1 to 29 ms. Catecholaminergic polymorphic VT was diagnosed if epinephrine provoked ≥3 beats of polymorphic or bidirectional VT and borderline if polymorphic couplets, premature ventricular contractions, or nonsustained monomorphic VT was induced. (mcmaster.ca)
  • While 1 patient had renal failure, all had normal left ventricular function. (annals.edu.sg)
  • Patients with unexplained cardiac arrest (normal left ventricular function and QT interval) and selected family members from the Cardiac Arrest Survivors with Preserved Ejection Fraction Registry (CASPER) registry underwent epinephrine challenge at doses of 0.05, 0.10, and 0.20 μg/kg per minute. (mcmaster.ca)
  • Stroke volume was derived as stroke distance multiplied by left ventricular outflow tract area. (bmj.com)
  • Objectives: The aim of this study was to investigate the prognostic value of stress cardiac magnetic resonance imaging (CMR) in patients with reduced left ventricular (LV) systolic function. (uky.edu)
  • Left ventricular contractility indices and systolic time intervals measured from aortic cusp echoes were repeatedly obtained during the fist postoperative week. (nih.gov)
  • Systolic time intervals as a measure of left ventricular function in viscose rayon workers exposed to carbon disulfide. (sjweh.fi)
  • In this study, we investigated whether aerobic interval training (AIT) could attenuate high-fat-diet- (HFD-) associated cognitive dysfunction and the possible mechanism of SIRT3-MnSOD pathway. (hindawi.com)
  • Stress cardiomyopathy is a reversible cause of left ventricular (LV) dysfunction [1]. (scirp.org)
  • The association between increased arterial stiffness and left ventricular diastolic dysfunction (LVDD) may be influenced by left ventricular performance. (medsci.org)
  • brachial-ankle pulse wave velocity, P wave dispersion, left ventricular diastolic dysfunction. (medsci.org)
  • The cardiac mortality and morbidity were increased in heart failure patients with left ventricular diastolic dysfunction (LVDD) [ 1 , 2 ]. (medsci.org)
  • Left ventricular (LV) diastolic dysfunction is known as an early marker of myocardial alterations in patients with diabetes. (biomedcentral.com)
  • Because microvascular disease has been regarded as an important cause of heart failure or diastolic dysfunction in diabetic patients, we tested the hypothesis that coronary flow reserve (CFR), which reflects coronary microvascular function, is associated with LV diastolic dysfunction in patients with type 2 diabetes. (biomedcentral.com)
  • In multivariate logistic regression analysis, left ventricular global longitudinal strain (per 1% decrease) showed a significant relationship with AHR (adjusted odds ratio 1.17, 95% CI 1.02-1.35).Conclusion:AHR in patients with AIS or TIA may be an important poor prognostic marker related to myocardial dysfunction. (ewha.ac.kr)
  • His-Purkinje tissue, atrial and ventricular muscle, and extranodal accessory pathways. (nih.gov)
  • In the present investigation, we assessed the use of various fractal analysis methods of HR variability to predict death in a population of patients with acute myocardial infarction (MI) and depressed left ventricular function. (wikipedia.org)
  • In a limited number of studies of patients with compromised myocardium (severe congestive heart failure, acute myocardial infarction, hypertrophic cardiomyopathy), administration of intravenous diltiazem produced no significant effect on contractility, left ventricular end diastolic pressure, or pulmonary capillary wedge pressure. (nih.gov)
  • Left ventricular wall segment motion after ultra-endurance exercise in humans assessed by myocardial speckle tracking. (ljmu.ac.uk)
  • We aimed to investigate the prognostic significance of AHR in patients with ischemic stroke or transient ischemic attack (TIA), and further examined the relationship between AHR and myocardial function, using two-dimensional speckle-Tracking echocardiography (2D-STE).Methods:A total of 244 consecutive patients with acute ischemic stroke (AIS) (n = 192) or TIA (n = 52), who were evaluated with 2D-STE within 7 days from admission, were retrospectively analysed. (ewha.ac.kr)
  • cardiac output, ejection fraction, and left ventricular end diastolic pressure have not been affected. (nih.gov)
  • The mean DP increase corresponding to one meter of walk was the only one that correlated negatively with the left ventricular ejection fraction. (hindawi.com)
  • The beneficial prognostic role of the 6MWT was demonstrated in patients with heart failure and low left ventricular ejection fraction [ 16 - 18 ]. (hindawi.com)
  • Echocardiographic parameters studied on the initial and follow-up examinations included chamber size, left ventricular wall thickness, global ejection fraction, segmental wall motion abnormality, estimated left atrial and pulmonary artery systolic pressure and valve morphology and function. (scirp.org)
  • Cardiac catheterization findings studied were coronary anatomy, left ventricular end-diastolic pressure, left ventricular size, global ejection fraction, segmental wall motion abnormality and mitral regurgitation. (scirp.org)
  • Assessment of left ventricular diastolic function is useful in risk stratification for patients with cardiovascular disease and can provide a diagnostic clue for heart failure with preserved ejection fraction. (medsci.org)
  • MFS patients presenting with normal ejection fraction show disturbed diastolic function and higher NT-proBNP levels, which is partly explained by aortic Z-score. (scipedia.com)
  • Median patient age was 62 years (interquartile range 51-69), sex was male in 409 (79%) patients, and left ventricular ejection fraction was 60% (54-65). (elsevierpure.com)
  • The most common abnormality was a ventricular septal defect followed by right ductus-arteriosus, both of which were found only in the 50mg/kg group. (cdc.gov)
  • Ventricular arrhythmia (VA) may be an isolated and completely benign finding in children, a marker of serious systemic disease or myopathy, or a mechanism for syncope and sudden cardiac death (SCD). (medscape.com)
  • Atrial pacing (Ap), very poor P wave and Wenckebach AV conduction, but no dropped beats because of end diastolic ventricular trigeminy (VE, red highlight). (cardioscan.co)
  • The pattern of QRS complexes and the increased duration indicated intra ventricular conduction delay. (cdc.gov)
  • We report the case of a 74-year-old patient affected by advanced multifocal HCV-cirrhosis related hepatocellular carcinoma and severe post-ischemic fall of left-ventricular function with serious risk of cardiac functional impairment. (biomedcentral.com)
  • Currently used two-dimensional (2D) echocardiographic RV assessment is challenging because of the peculiar morphology of this ventricular cavity. (thoracickey.com)
  • The effects of aerobic interval training on the left ventricular morphology and function of VLCAD-deficient mice. (ufl.edu)
  • Before ischemia, acute troglitazone treatment had no effect on LV function, electrocardiogram, or substrate utilization. (diabetesjournals.org)
  • The degree of impairment of left ventricular function was assessed for different diagnostic groups and are tabulated. (nih.gov)
  • Such data have no predictive value with respect to effects in patients with poor ventricular function, and increased heart failure has been reported in patients with preexisting impairment of ventricular function. (nih.gov)
  • We report the case of a patient affected by advanced hepatocellular carcinoma and serious impairment of cardiac function treated with sorafenib without any worsening of heart function. (biomedcentral.com)
  • The presented case can offer to oncologists a clinical support to take into consideration when deciding to treat with sorafenib advanced hepatocellular carcinoma patients presenting with serious impairment of cardiac function that are usually excluded from an active treatment. (biomedcentral.com)
  • These indices could complement conventional analysis of left ventricular function and contribute to the early accurate detection of cardiomyopathy in cats. (avma.org)
  • NT-proBNP, C-reactive protein (CRP) and diastolic function were assessed in 217 patients with MFS (31 ± 16 y, 110 f. and in 339 patients referred for suspected MFS in whom the diagnosis was ruled out according to the Ghent nosology (30 ± 15 y, 154 f). (scipedia.com)
  • Besides age and gender, diagnosis of MFS, diastolic function (e′ and E/e′), Z-Score of aortic diameter, and left ventricular size were identified as significant independent parameters with impact on NT-proBNP levels. (scipedia.com)
  • The aim of the present study was to evaluate left ventricular diastolic function, type of cardio-vascular hypertrophy and NT-proBNP levels in out-patients with MFS and a control group with similar clinical manifestations referred for evaluation of suspected MFS in whom the diagnosis was ruled out. (scipedia.com)
  • For these reasons, the accurate assessment of RV function and the early diagnosis of its failure might improve outcomes in the most critical patients undergoing cardiac surgery, leading to better prevention and management strategies. (thoracickey.com)
  • Among survivors, neither LV function nor substrate utilization differed between groups. (diabetesjournals.org)
  • A pacemaker and physiological sensor for use therewith that allows the rate at which the pacemaker delivers electrical stimulation pulses to the heart, or the escape interval during which a natural heart event must occur before an electrical stimulation pulse is delivered, to be adjusted as needed in order to satisfy the body's physiological needs. (justia.com)
  • If, over several heart cycles or beats, an increase or decrease in these measurements is detected, the pacing interval set by the pacemaker is adjusted in an appropriate direction in order to adjust the heart stimulation rate accordingly. (justia.com)
  • Disadvantageously, many modern pacemakers do not yet have the capability to automatically adjust the pacing rate, or pacing interval, in the absence of a sinus P-wave (a sinus P-wave is explained below) as a function of the body's physiological needs unless some sort of physiological sensor external to the pacemaker is employed. (justia.com)
  • The present invention is directed to an improved pacemaker that includes the capability of automatically adjusting the paced heart rate as a function of sensed physiological needs within the body. (justia.com)
  • Due to this, the intrinsic electric rhythm of the ventricular muscle takes over the pacemaker role for the ventricles. (pediatriconcall.com)
  • Remember this is normal atrial pacemaker function! (cardioscan.co)
  • Assessment of diastolic function and NT-proBNP levels may therefore detect early abnormalities and guide surveillance and prevention management of patients with MFS. (scipedia.com)
  • Intraoperative 3D TEE assessment of RV volumes and function is feasible in patients with normal and dilated right ventricles, with good correlation between 3D transthoracic echocardiographic and TEE RV parameters. (thoracickey.com)
  • Left ventricular ejection time (LVET) was the most useful parameter of cardiac function in the immediate postoperative period and was of prognostic value in 5 patients who died early in that period. (nih.gov)
  • The RR interval will shorten when the heart speeds up, and lengthen when it slows. (wikipedia.org)
  • Short QT Interval Syndromes The short QT interval syndromes (SQTS) are extremely rare congenital or very rarely acquired disorders of cardiac ion channel function or regulation that shorten ventricular myocyte action potential. (merckmanuals.com)
  • Aerobic interval training (AIT) is an emerging exercise approach, which typically involves repeated bouts of high-intensity exercise and interspersed with periods of low intensity recovery or rest. (hindawi.com)
  • Corrigendum to "Six weeks of high intensity interval training (HIIT) facilitates a four year preservation of aerobic capacity in sedentary older males: A reunion study" [Exp. (uws.ac.uk)
  • If the SA node is not functioning properly, the heartbeat can be too slow (bradycardia). (medlineplus.gov)
  • Objective -To analyze velocities of the annulus of the left atrioventricular valve and left ventricular free wall (LVFW) in a large population of healthy cats by use of 2-dimensional color tissue Doppler imaging (TDI). (avma.org)
  • Multivariate Cox regression analysis demonstrated that AHR [adjusted hazard ratio 4.60, 95% confidence interval (95% CI) 1.31-16.15] was a strong predictor of MACCE. (ewha.ac.kr)
  • Decrease in left ventricular function was strongly correlated to operating time, cardiac bypass time, and aortic clamping time, the most important factor being cardiac bypass time. (nih.gov)
  • The ECG shows a complete dissociation between the P-waves (representing the atrial rhythm) and the QRS complexes (representing the ventricular activity). (pediatriconcall.com)
  • These measurements could improve the quantitative evaluation of RV function during cardiac surgery. (thoracickey.com)
  • the absence of encephalopathy and ascites and the normality of coagulation parameters and of albumin led to classify the patient into the functional class Child-Pugh A. The patients was successfully treated with sorafenib at the reduced daily dose of 400 mg for long-time without any worsening of heart function. (biomedcentral.com)
  • Delta EF showed negative correlation with number of leads with T inversion (p = 0.01) and QT interval (p = 0.02). (scirp.org)
  • The interval between two successive R waves (the RR interval) is a measure of the heart rate. (wikipedia.org)
  • Channelopathies are a group of genetic, autoimmune, or inflammatory conditions that alter cardiomyocyte ion channel function in a manner that predisposes to bradyarrhythmias or tachyarrhythmias in the absence of a structural heart disorder. (merckmanuals.com)
  • The patients with diagnosed heart failure, compared to the control group, were characterized by a shorter walking distance and greater DP increase at equal walking intervals. (hindawi.com)
  • Similar relationships have been demonstrated for patients with heart failure and preserved left ventricular diastolic function [ 19 ]. (hindawi.com)
  • The sensor measures the depolarization time interval between an atrial stimulation pulse, A, and the responsive atrial or ventricle depolarization, P or R respectively, as an indication of the physiological demands placed on the heart. (justia.com)
  • As is explained more fully below, the present invention senses physiological need by noting changes in a selected time interval associated with the rhythm of the heart. (justia.com)
  • The effects of ethylene - glycol -monomethyl-ether (109864) (EGME) on heart function were investigated in Sprague-Dawley-rats. (cdc.gov)
  • Ventricular action potential duration (APD) is an important component of many physiological functions including arrhythmogenesis. (ox.ac.uk)
  • Here below we report a case of a patient with multifocal HCC HCV-cirrhosis related who, notwithstanding the presence of a series of cardiovascular alterations, has been successfully treated with sorafenib without any further significant worsening of the cardiovascular function. (biomedcentral.com)