INTRODUCTION AND OBJECTIVES The influence of coronary artery revascularization on the control of ventricular arrhythmias in patients with chronic myocardial infarction is uncertain. However, ablation of the arrhythmogenic circuit in these patients by aneurysm resection is useful for controlling ventricular arrhythmias. We made a prospective analysis of our clinical strategy in patients who were...

Objective(s) Dracocephalum moldavica (D. moldavica) have been traditionally used as a cardiotonic agent in the folk medicine of some regions of Iran. In the present study, effects of total extract of D. moldavica on ischemia/reperfusion induced arrhythmias and infarct size investigated in isolated rat heart. Materials and Methods The isolated hearts were mounted on a Langendorff apparatus th...

A direct method for studying valvular competence is described based on changes in impedance in the blood induced by injections of concentrated saline. It does not require withdrawal of blood samples and may be repeated at frequent intervals in the same animal. It detected mitral insufficiency in the absence of significant changes in atrial pressure tracings. Mitral insufficiency was observed fr...

Cardiac arrhythmias, caused by disorders in the generation and transmission of cardiac impulses, is included among the heart disorders that cause inefficient blood circulation. The most commonly-used method for diagnosing this disorder is electrocardiography. In this study, we aimed to identify and diagnose different types of arrhythmia prevalent among the seemingly-healthy horses of Sanandaj C...

Background & Aims: This study was carried out to assess the effect of opium addiction on the incidence of different types of arrhythmias after acute myocardial infarction (AMI). Methods: The study population consisted of 200 patients with first AMI admitted within 6 hours of the onset of chest pain to the coronary care units (CCU) of two hospitals affiliated to Kerman University of Medical Scie...

FEATURES Programmed electrical stimulation of the heart in patients with life-threatening ventricular arrhythmias: What is the significance of induced arrhythmias and what is the correct stimulation protocol? FOLLOWING ITS INTRODUCTION into the practice of cardiology in 1972,1 programmed electrical stimulation (PES) of the heart has developed from a technique used for diagnostic purposes into o...

Early after depolarizations (EAD) occur in many pathological conditions, such as congenital or acquired channelopathies, drug induced arrhythmias, and several other situations that are associated with increased arrhythmogenicity. In this paper we present an overview of the relevant computational studies on spatial EAD dynamics in 1D, 2D, and in 3D anatomical models and discuss the relation of E...