Functiogenesis of cardiac pacemaker activity

Erosive Pressure Dermatitis Associated with Cardiac Pacemaker

Erosive dermatitis is a skin reaction associated with implantable cardiac devices (ie, pacemakers and cardioverter defibrillators). We report a 65-year-old man with a history of several cerebrovascular attacks who developed an erythematous crusted erosive patch over the pacemaker site after implantation of two subsequent pacemakers. We suggest that physical irritation may be a trigger factor fo...

The Functional Role of Chloride Channels in Cardiac Pacemaker Activity

Sexual dimorphism in the complexity of cardiac pacemaker activity.

This study explored the effects of gender and aging on the complexity of cardiac pacemaker activity. Electrocardiogram signals were studied in normal women (n = 240) and men (n = 240) ranging in age from 40 to 79 yr. Nonlinear analysis of short-term resting R-R intervals was performed using the correlation dimension (CD), approximate entropy (ApEn), and largest Lyapunov exponent (LLE). Evidence...

An intragastric cardiac pacemaker.

A 62-year-old housewife was seen in May 1967 with attacks of dizziness and loss of consciousness. A diagnosis of complete heart block with Stokes-Adams syncope was made. Anterolateral thoracotomy was performed and myocardial electrodes were inserted over the left ventricle and were connected to a Devices fixed-rate pacemaker, inserted in the rectus sheath posterior to the rectus muscle. Postope...

Trends in Cardiac Pacemaker Batteries

Batteries used in Implantable cardiac pacemakers-present unique challenges to their developers and manufacturers in terms of high levels of safety and reliability. In addition, the batteries must have longevity to avoid frequent replacements. Technological advances in leads/electrodes have reduced energy requirements by two orders of magnitude. Micro-electronics advances sharply reduce internal...