a printout of the entire electrocardiographic recording was made and hand counts of ventricular arrhythmias were correlated with heart rate , qtc interval , rr interval preceding ventricular fibrillation or torsade de pointes and ( rr ' ) /qt initiating ventricular fibrillation or torsade de pointes .
C0085612
ventricular arrhythmias
C0042510
ventricular fibrillation