Table 2

Choice of Pacemaker Generator in Selected Indications for Pacing

Pacemaker GeneratorSinus Node DysfunctionAtrioventricular BlockNeurally Mediated Syncope or Carotid Sinus Hypersensitivity
Single-chamber atrial pacemakerNo suspected abnormality of atrioventricular conduction and not at increased risk for future atrioventricular blockNot appropriateNot appropriate
Maintenance of atrioventricular synchrony during pacing desired
Single-chamber ventricular pacemakerMaintenance of atrioventricular synchrony during pacing not necessaryChronic atrial fibrillation or other atrial tachyarrhythmia or maintenance of atrioventricular synchrony during pacing not necessaryChronic atrial fibrillation or other atrial tachyarrhythmia
Rate response available if desiredRate response available if desiredRate response available if desired
Dual-chamber pacemakerAtrioventricular synchrony during pacing desiredRate response available if desiredSinus mechanism present
Suspected abnormality of atrioventricular conduction or increased risk for future atrioventricular blockAtrioventricular synchrony during pacing desiredRate response available if desired
Rate response available if desiredAtrial pacing desired
Rate response available if desired
Single-lead, atrial-sensing ventricular pacemakerNot appropriateDesire to limit the number of pacemaker leadsNot appropriate