ventricular arrhythmias also were closely associated with mortality , but only during the first year , the 2 most discriminant factors being a mean hourly frequency of ventricular ectopic beats ( veb ) greater than 10 , and the presence of successive veb ( doublet or burst of ventricular tachycardia ) .
C0085612
ventricular arrhythmias
C0042514
ventricular tachycardia