A New Pacemaker Algorithm for the Treatment of Atrial Fibrillation: Results of the Atrial Dynamic Overdrive Pacing Trial (ADOPT) Electrophysiologic Characteristics of the Spontaneous Onset and ...
During atrial overdrive pacing at a cycle length of 420 ms, the following EKG was recorded (Fig. 1). What is the mechanism for the progressive widening of QRS complexes and for the normal narrow ...