Recurrent ventricular tachycardia induced by an atrial synchronous ventricular-inhibited pacemaker.
Atrial synchronous pacemakers have been known to cause a variety of cardiac arrhythmias. Of particular concern are those arrhythmias involving a pacemaker stimulus occurring on a T wave, because these may lead to ventricular tachycardia. The Medtronic 2409 ASVIP pacemaker is an atrial synchronous pacemaker with several features designed to decrease the likelihood of such arrhythmias. We report a patient in whom a normally functioning Medtronic 2409 ASVIP pacemaker, despite these features, induced recurrent ventricular tachycardia. Conditions which predisposed this patient to pacemaker-induced re-entrant arrhythmias are discussed.
D004077:Digoxin / Q000009:adverse effects / Q000097:blood; D004554:Electric Countershock; D004594:Electrophysiology; D005260:Female; D006327:Heart Block / Q000150:complications / Q000628:therapy; D006333:Heart Failure / Q000150:complications / Q000628:therapy; D006352:Heart Ventricles / Q000503:physiopathology; D006801:Humans; D008875:Middle Aged; D009203:Myocardial Infarction / Q000150:complications / Q000628:therapy; D010138:Pacemaker, Artificial / Q000009:adverse effects*; D011342:Procainamide / Q000009:adverse effects / Q000097:blood; D013610:Tachycardia / Q000175:diagnosis / Q000209:etiology* / Q000628:therapy
D004077:Digoxin; D011342:Procainamide