thirty-four patients had one or more documented arrhythmias preoperatively ( 18 had paroxysmal supraventricular tachycardia , 10 had paroxysmal atrial fibrillation or flutter , 13 had ventricular arrhythmia and 3 had high grade atrioventricular block ) .
C0003811
arrhythmias
C0085612
ventricular arrhythmia