Chest-wall stimulation: A method of demand QRS-blocking pacemaker suppression in the study of arrhythmias

Low amplitude electrical stimuli delivered to the chest wall from a portable pacemaker may be used to suppress the implanted QRS-blocking, demand-type pacemaker. This technique allows analysis of the underlying electrocardiogram. The value of this method in the study of the natural history of conduction system disease, pacemaker-conduction system interaction, and in management of patients wearing these devices is illustrated.