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Pathophysiology and Prevention of Atrial Fibrillation
Atrial fibrillation (AF) is a ubiquitous yet diverse cardiac arrhythmia whose incidence increases with age; with most forms of cardiac and some pulmonary diseases; and with a number of metabolic,… Expand
Calcium and arrhythmogenesis.
Triggered activity in cardiac muscle and intracellular Ca2+ have been linked in the past. However, today not only are there a number of cellular proteins that show clear Ca2+ dependence but also… Expand
Alterations of Na+ currents in myocytes from epicardial border zone of the infarcted heart. A possible ionic mechanism for reduced excitability and postrepolarization refractoriness.
Previously, we have shown abnormalities in Vmax and in the recovery of Vmax in myocytes dispersed from the epicardial border zone (EBZ) of the 5-day infarcted canine heart (myocytes from the EBZ… Expand
Early electrical remodeling in rabbit pulmonary vein results from trafficking of intracellular SK2 channels to membrane sites.
OBJECTIVE Atrial fibrillation is often initiated by bursts of ectopic activity arising in the pulmonary veins. We have previously shown that a 3-h intermittent burst pacing protocol (BPP), mimicking… Expand
Short Communication: Flecainide Exerts an Antiarrhythmic Effect in a Mouse Model of Catecholaminergic Polymorphic Ventricular Tachycardia by Increasing the Threshold for Triggered Activity
Rationale: Flecainide prevents arrhythmias in catecholaminergic polymorphic ventricular tachycardia, but the antiarrhythmic mechanism remains unresolved. It is possible for flecainide to directly… Expand
Electrical remodeling in ischemia and infarction.
This is a review of the electrophysiologic changes occurring at different times following myocardial infarction, both in the infarcted region (substrate) and in areas remote from the infarct.… Expand
Dynamic remodeling of K+ and Ca2+ currents in cells that survived in the epicardial border zone of canine healed infarcted heart.
- W. Dun, S. Baba, T. Yagi, P. Boyden
- Medicine, Biology
- American journal of physiology. Heart and…
- 1 September 2004
Action potentials (APs) of the epicardial border zone (EBZ) cells from the day 5 infarcted heart continue to be altered by day 14 postocclusion, namely, they shortened. However, by 2 mo, EBZ APs… Expand
Abnormal Electrical Properties of Myocytes From Chronically Infarcted Canine Heart: Alterations in &OV0312;max and the Transient Outward Current
BackgroundReentrant ventricular arrhythmias can occur in the surviving muscle fibers of the epicardial border zone of the canine heart 5 days after coronary artery occlusion. To understand the… Expand
Ca(2+) transients and Ca(2+) waves in purkinje cells : role in action potential initiation.
Purkinje cells contain sarcoplasmic reticulum (SR) directly under the surface membrane, are devoid of t-tubuli, and are packed with myofibrils surrounded by central SR. Several studies have reported… Expand
Electrical remodeling of the epicardial border zone in the canine infarcted heart: a computational analysis.
The density and kinetics of several ionic currents of cells isolated from the epicardial border zone of the infarcted heart (IZs) are markedly different from cells from the noninfarcted canine… Expand