Learn More
OBJECTIVE To examine the effects of pulmonary hypertension on left ventricular diastolic function and to relate the findings to possible mechanisms of interdependence between the right and left sides of the heart in ventricular disease. DESIGN A retrospective and prospective analysis of echocardiographic and Doppler studies. SETTING A tertiary referral(More)
OBJECTIVE To assess the diastolic effect of left bundle branch block in patients with dilated cardiomyopathy. DESIGN Retrospective study of M mode and Doppler echocardiograms along with electrocardiogram and phonocardiogram. SETTING Tertiary referral cardiac centre. PATIENT PARTICIPANTS: Fifty two patients with dilated cardiomyopathy, all with(More)
OBJECTIVE To investigate the effects of QRS duration on characteristics of the left ventricular pressure pulse derived from the time course of functional mitral regurgitation by continuous wave Doppler. DESIGN Retrospective and prospective study of 50 patients with dilated cardiomyopathy, by electrocardiography, echocardiography, and Doppler cardiography.(More)
OBJECTIVE To assess the effect of right atrial appendage pacing on atrial electromechanical interrelations in patients with DDD pacemakers. DESIGN Prospective study by M mode echocardiogram, Doppler echocardiogram, and apexcardiogram, along with electrocardiogram and phonocardiogram. SETTING Tertiary cardiac referral centre. PATIENTS 20 patients with(More)
Remote ischemic preconditioning (RIPC) has been proposed as an effective method to improve both myocardial and vascular protection in human beings. The aim of this study was to identify the effect of RIPC on the flow pattern of left anterior descending coronary artery (LAD) by transthoracic Doppler echocardiography. 18 normal male volunteers were enrolled(More)
OBJECTIVE To investigate the nature of ventricular activation and its relation with mechanical events in patients with dilated cardiomyopathy. STUDY DESIGN Retrospective and prospective study with 12 lead electrocardiograms, signal averaged electrocardiograms, and M mode and Doppler echocardiograms. SETTING Tertiary cardiac referral centre. PATIENTS(More)
BACKGROUND Autonomic dysfunction (AD) is associated with morbidity and mortality in patients with systolic heart failure (SHF). The extent of AD when LV ejection fraction is preserved (HF-NEF), is unclear. Our objectives were: 1) quantitative assessment of autonomic function in SHF and HF-NEF; and 2) exploration of relationships among AD, symptoms and(More)
This paper proposes a bacterial foraging based approach for portfolio optimization problem. We develop an improved portfolio optimization model by introducing the endogenous and exogenous liquidity risk and the corresponding indexes are designed to measure the endogenous/exogenous liquidity risk, respectively. Bacterial foraging optimization (BFO) is(More)
Mitral or tricuspid regurgitation of long duration may so shorten the ventricular filling time in dilated cardiomyopathy that stroke volume is limited. We assessed the effects of changing the atrioventricular interval during temporary or permanent dual-chamber DDD pacing in twelve dilated cardiomyopathy patients with short ventricular filling times due to(More)
OBJECTIVE To compare the different effects of right ventricular pacing and classic left bundle branch block on left ventricular function. DESIGN Retrospective and prospective study of 48 patients by electrocardiography, and M mode, cross sectional, and Doppler echocardiography. SETTING A tertiary cardiac referral centre. PATIENTS 48 patients (age(More)