A premature atrial contraction (PAC) occurs when a focus in the atrium (not the SA node), generates an action potential before the next scheduled SA node action potential. There are four main ...

A premature atrial contraction (PAC) occurs when a focus in the atrium (not the SA node), generates an action potential before the next scheduled SA node action potential. When this occurs prior ...

There are two types of premature beats, a premature atrial contraction in the top chamber of the heart and a premature ...

and are called premature atrial contractions (PACs). Ventricular bigeminy: The extra beats come from the lower heart chambers and are called premature ventricular contractions (PVCs). Ventricular ...

including premature atrial contractions (PACs), believed to be a primary inducer of AF. Using data from dual-chamber pacemakers with advanced diagnostic functions, Yang et al. have identified ...

or naturally occurring such as a premature atrial or ventricular contraction), and that resetting results from a peculiar type of interaction: change in the tachycardia clock but maintenance of ...