and ( 2 ) although sudden death is relatively uncommon in patients with high grade ventricular arrhythmias other than ventricular tachycardia ( annual mortality rate 1 percent ) , the finding of ventricular tachycardia on 24 hour electrocardiography identifies a subgroup of patients at high risk for sudden death ( annual mortality rate 8.6 percent ) .
C0039231
tachycardia
C0042514
ventricular tachycardia