to an immediateor delayed (DC) coronary angiographic strategy in a 3 x 2 factorial design. Of 288 DC pts, 74 (26%) required urgent angiography (UC) within 5 days of admission (54 within 24 hrs) because of chest pain ion (33%); 54% (89%). ST segment elevation (62%) or Crossover to WC CA and 5% had urgent icted by pt age or after admission and was no sex, infarct-relatedartery, number of diseased vessels, coronary risk factorsor time IOlytic therapy.It occurredwith similar lkquency after tPA, UK and tPA/UK therapy (30% vs 25 associatedwith an infarc: vessel occlusion rate
no baseline clinical characteristicswere predictive of this phenomenon, and (iii) despite crossoverto an aggressiveinterventional strategy,this population had greatercardiacdecompensationand a reducedsurvival.