four of the 11 variables came from the patient 's clinical history : ( 1 ) cardiac arrest at the time of the first spontaneous episode of arrhythmia , ( 2 ) new york heart association functional class for dyspnoea = iii , ( 3 ) ventricular tachycardia or ventricular fibrillation occurring early ( after 3 days and within 2 months ) after myocardial infarction , ( 4 ) multiple myocardial infarctions before the first episode of ventricular tachyarrhythmia .
C0003811
arrhythmia
C0042510
ventricular fibrillation