OBJECTIVE This study utilized Doppler ultrasonography cardiograms in patients with third-degree atrioventricular (III-AV) block to compare right ventricular apex (RVA) pacing and right ventricular outflow tract (RVOT) pacing with respect to their effects on synchronization of contraction between the two ventricles, as well as on timing of specific left-ventricular electrical and mechanical even...

Background: Right ventricular infarction (RVI) is frequently associated with inferior wall myocardial infarction (MI). Methods: This study was designed to identify the burden of RVI in patients presenting with inferior wall MI (n=50) by right precordial electrocardiogram (ECG) and comparing it with echocardiography (ECHO). Results: Their mean age was (54.5 ± 11.9 years); there were 42 males. ST...

M mode echocardiography was used in 10 normal subjects to study left ventricular dimension and function variables at identical heart rates during tachycardia induced by supine bicycle exercise or atrial pacing. Echocardiographic data were analysed independently by two observers. The maximum heart rate reached during atrial pacing was lower (mean (1SD) 148 (17) beats/min) than that reached durin...

This echocardiographic study was designed to assess left ventricular function and pulmonary blood flow in ventricular septal defect. Fifty-one patients aged 2 weeks to 21 years were investigated (group 2). Five of 10 operated patients were studied one week after surgical closure of the defect (group 3) and seven 3 to 6 weeks postoperatively (group 4). The control group consisted of 45 normal su...

Picture 1. (A) A chest X-ray showing enlargement of the right atrium (RA) (arrow), (B) An echocardiogram showing dilatation of the coronary sinus (CS) (arrow), (C) A multislice computed tomogram showing enlargement of the RA, (D) A multislice computed tomogram showing persistent left superior vena cava (SVC) (arrow) which drained into the RA through the CS. LAD: left atrial dimension, LVDd: lef...

BACKGROUND Frequent ventricular ectopic beats (VEB) in patients without significant cardiac disease are usually classified as benign arrhythmia. However, they may alter cardiac performance. RF ablation can effectively eliminate VEB. AIM To evaluate the effects of RF ablation on selected haemodynamic parameters of left ventricular (LV) systolic and diastolic function and exercise capacity in p...

We initially found that the fall in left ventricular pressure during isovolumic relaxation is exponential and therefore characterized by a time constant (T). To the extent that isovolumic pressure fall reflects myocardial events during relaxation, T indexes the time course of relaxation of the left ventricle. In isolated canine hearts sudden beat to beat loading changes from isovolumic to eject...

conclusions the vibratory innocent murmur is associated with the presence of left ventricular false tendon and higher left ventricular outflow tract velocity. the presence of the left ventricular false tendon was somewhat associated with decreased early diastolic myocardial velocity. normal left ventricular systolic and diastolic function can be used as a reassurance in cases with the vibratory...

OBJECTIVE To determine ventricular remodeling (VR) and the role of clinical and functional variables in patients with normal cardiac function who underwent right ventricular apical pacing (RVAP). METHODS Among the 268 consecutive patients with standard pacemaker due to complete atrioventricular block (CAVB), those with left ventricular ejection fraction (LVEF) < 55% and left ventricular end-d...

Longitudinal echocardiographic studies of left ventricular (LV) function in valvular disease were evaluated in 24 medically treated patients followed for 6 months to 3 years (mean 16.3 months) and in 22 surgically treated patients before and at least 1 year after operation (mean 14 months). In initial reproducibility studies of enlarged hearts (mean end-diastolic dimension [EDDI 6.6 0.2 cm [± S...