• There is general agreement that sympathetic agents enhance impulse transmission through the A-V node, but reports differ concerning their influence on specialized conduction tissue and ventricular muscle.-Recently several investigators" have suggested that catecholamines may result in a more synchronous contraction of the heart, resulting possibly from a change in the sequence of ventricular ...

in this study, it was surveyed to know whether an oral single dose of oleuropein could mimic the cardiac preconditioning in rats’ hearts or whether its prolonged oral administration could protect the heart against the aconitine-induced arrhythmia in rats. eighty male wistar rats were divided into two series (n = 8 in each group). in the first series, all groups (except the control (con) group) ...

background: early diagnosis of left ventricular mass (lvm) inappropriateness and left ventricular hypertrophy   (lvh) can result in preventing diastolic left ventricular dysfunction and its related morbidity and mortality. this study was performed to determine if diastolic dysfunction   is associated with lvh and inappropriate lvm. methods: one hundred   and twenty five uncomplicated hypertensi...

AIMS Obesity leads to hypertension and metabolic disturbances, as well as left ventricular hypertrophy and altered left ventricular geometry. However, the underlying mechanisms behind these relationships are not clear. The aim of this study was to investigate how body composition, blood pressure and metabolic factors relate to left ventricular mass and geometry. METHODS AND RESULTS We include...

BACKGROUND Survivors of aborted sudden death attributable to ventricular arrhythmias in the presence of coronary artery disease are at risk for recurrences. The substrate underlying these arrhythmias is not clear, and therefore the relation between ischemia, viability, scar tissue (and revascularization), and the incidence of ventricular arrhythmias (and survival) was studied over up to 3 years...

Acidosis has complex electrophysiological effects, which are associated with a high recurrence of ventricular arrhythmias. Through multi-scale cardiac computer modeling, this study investigated the mechanisms underlying the emergence of post-acidosis arrhythmia at the tissue level. In simulations, ten Tusscher-Panfilov ventricular model was modified to incorporate various data on acidosis-induc...

OBJECTIVES this study focused on the effect of waterpipe smoke exposure toxicity on the structure of albino rat's ventricular tissue and their recovery. MATERIALS AND METHODS Albino rats were divided into three groups: control, flavored, and unflavored. The control group was exposed to normal air while the flavored and unflavored groups were exposed to waterpipe smoke for a period of 90 days....

Transthoracic echocardiography (TTE) is an important tool for diagnosis and follow-up of patients with congenital heart disease (CHD). Appropriate use of TTE can reduce the need for more invasive and complex modalities, such as cardiac catheterization and cardiac magnetic resonance imaging. New echocardiographic techniques have emerged for the assessment of ventricular systolic and diastolic fu...