Health Dictionary
Reliable, easy-to-read patient information on common medical conditions — written in plain language, free of jargon, and grounded in current evidence. Browse the most frequent diagnoses, understand what they mean for everyday life, and learn which steps and questions help you have a focused conversation with your doctor.
Premature atrial contraction pathophysiology
Introduction
Overview
Overview
Mechanisms responsible for spontaneous premature atrial contraction are not clear but reentry within the atrium is the most probable mechanism.
Pathophysiology
Pathophysiology
PACs occur frequently in subjects with normal hearts and hence it is difficult to establish a definite relationship to the factors that predispose to these extra beats. However the following could be the possible mechanisms for PACs :
- Reentry within the atrium
- Autonomic modulation of the atria
- Automaticity Activity
- Triggered Activity
References
References
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Mugilan Poongkunran M.B.B.S [2]