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Arrhythmia incidence. Atrial tachycardia, sinus bradycardia, and ventricular arrhythmias were the most commonly observed arrhythmias. Only 6 of 29 ventricular arrhythmias received therapy. (AVB = atrioventricular block; AVRT = atrioventricular reciprocating tachycardia; SVT = supraventricular tachycardia (unspecified).)
