multivariate analysis identified an ejection fraction of less than 0.40 , syncope or cardiac arrest before amiodarone therapy , and vt ( 3 or more consecutive ventricular premature complexes ) during predischarge ambulatory electrocardiographic monitoring as variables associated with a high risk of subsequent fatal or nonfatal cardiac arrest ( p less than 0.03 ) .
C0039070
syncope
C0002598
amiodarone