AV Sequential Pacing
Frank G. Yanowitz, M.D.
Copyright 1998
Pacemaker spikes immediately precede each QRS complex indicating ventricular pacing. Each QRS also has a preceding sinus P wave indicating that the patient is in sinus rhythm. An atrial pacing wire senses the sinus rhythm and coordinates ventricular pacing to allow atrial contraction to contribute to ventricular filling. This is a common form of dual chamber pacing.