PMID: 2500080Feb 1, 1989Paper

Autoregulation of ventricular parasystole. The triphasic phase response curve

Archives des maladies du coeur et des vaisseaux
N SaoudiP Touboul

Abstract

In the previously published examples where parasystolic rhythms were modulated and entrained, the electrotonic events came from the action potentials arising from the surrounding myocardium. In the two present cases, a ventricular parasystolic focus was entrained by the electrotonic image of the action potentials resulting from its own discharges. The electronic transmission across the protection zone being delayed, the resulting ventricular action potentials were able to automodulate, and entrain, the parasystolic focus according to a triphasic phase response curve. The development of the theory of parasystolic modulation may explain certain bizarre EKG recordings.

Related Concepts

Related Feeds

Arrhythmia

Arrhythmias are abnormalities in heart rhythms, which can be either too fast or too slow. They can result from abnormalities of the initiation of an impulse or impulse conduction or a combination of both. Here is the latest research on arrhythmias.

Atrial Fibrillation

Atrial fibrillation is a common arrhythmia that is associated with substantial morbidity and mortality, particularly due to stroke and thromboembolism. Here is the latest research.