serious dysrhythmias , including ventricular fibrillation ( vf ) , ventricular tachycardia ( vt ) , ventricular premature beats ( vpbs ) ( more than five/min , multifocal and r on t phenomenon ) , and 2 degrees atrioventricular block were found in thirteen patients ( 43 % ) .
C0003811
dysrhythmias
C0042510
ventricular fibrillation