The heart's regular electrical activity is initiated by specialized cardiac pacemaker cells residing in the sinoatrial node. The rate and rhythm of spontaneous action potential firing of sinoatrial node cells are regulated by stochastic mechanisms that determine the level of coupling of chemical to electrical clocks within cardiac pacemaker cells. This coupled-clock system is modulated by auton...

The aim of this study was to compare the effects of cardiac resynchronization therapy on left ventricular function and reverse remodeling in patients in sinus rhythm with the effects in patients with atrial fibrillation who have not undergone atrioventricular node ablation. Echocardiographic and clinical parameters were evaluated at baseline and after 6 months of cardiac resynchronization thera...

The abrupt cessation of effective cardiac function due to an aberrant heart rhythm can cause sudden and unexpected death at any age, a syndrome called sudden cardiac death (SCD). Annually, more than 300,000 cases of SCD occur in the United States alone, making this a major public health concern. Our current understanding of the mechanisms responsible for SCD has emerged from decades of basic sc...

The studies on In-Hospital Cardiac Arrest are limited by the fact that most of them carried out for patient admitted in ICU. Particularly ward patients, there lies a big void literature and hence this research study was undertaken order to clinical outcome in-hospital cardiac arrest patients ward. A hospital based observational among 119 evaluate presented Deenanath Mangeshkar Hospital & Re...

Many physical processes have distributions of times between events that have non-normalizable, power law probability density functions ~PDF’s!. The moments of such distributions are not defined. We found that the PDF’s of the times between events of ventricular tachyarrhythmia ~rapid heart rate! and premature ventricular contractions have a power law form indicative of a non-normalizable distri...

We present a 16-year-old patient with Wolff-Parkinson-White syndrome admitted with syncope and aborted sudden cardiac death. Electrocardiography showed only a short PR interval without a delta wave. The QRS transition zone was on V2 in the precordial leads. Twenty-four-hour ambulatory cardiac rhythm monitoring showed an obvious delta wave only at night-time. Electrophysiologic testing was perfo...

Sixty-five patients who remained in coma for more than 24 hours after resuscitation from cardiac arrest were divided into two groups according to their EEGs. Thirteen patients were found to have rhythm of alpha frequency while 52 had the usual EEG findings after cerebral anoxia. Three patients from the group with alpha frequency EEG rhythms regained full consciousness but showed severe sequelae...

The scalar and intracardiac electrocardiograms recorded at the time of cardiac catheterization in 5 patients with ventricular pre-excitation have been analysed. Four patients had paroxysmal tachycardia on one or more occasions during the procedure. In each case where complete records were available the dysrhythmia was an atrial reciprocating tachycardia and this rhythm wasnoted at some time dur...