serious supraventricular tachyarrhythmias included an episode of ectopic atrial tachycardia ( 1 subject ) , a short run of atrial fibrillation ( 1 subject ) and of flutter ( 1 subject ) , and several episodes of supraventricular tachycardia ( 2 subjects ) , all accompanied by more than 50 svecs per hour .
C0039234
ectopic
C0039240
supraventricular tachycardia