Source:http://linkedlifedata.com/resource/umls/id/C2349117
NCI: Multiple, temporally related, episodes of ventricular tachycardia or fibrillation, occurring three or more times in a 24 hour period. (NCI),NCI: Multiple, temporally related, episodes of ventricular tachycardia or fibrillation, occurring three or more times in a 24 hour period.