patients were divided into 3 groups according to the severity of ventricular arrhythmia : no or mild ( unifocal , maximal hourly ventricular premature complex rate less than 30 , n = 6 ) , moderate ( maximal hourly ventricular premature complex rate greater than or equal to 30 or multifocal , n = 6 ) or severe ( r on t , greater than or equal to 2 consecutive ventricular premature complexes or ventricular fibrillation , n = 9 ) .
C0085612
ventricular
C0042510
ventricular fibrillation