Long-term survival with use of percutaneous extracorporeal life support in patients presenting with acute myocardial infarction and cardiovascular collapse.

Abstract

Up to 10% of patients who arrive at the hospital with acute myocardial infarction (AMI) present with or develop cardiogenic shock. Some patients, despite inotropes and intra-aortic balloon pump (IABP) placement, are not hemodynamically stable enough to undergo emergent revascularization. The use of percutaneous extracorporeal life support (ECLS) can stabilize patients to allow effective therapy. In a retrospective review of the first 100 patients emergently placed on ECLS by a nurse-supported physician insertion technique at Sharp Memorial Hospital, 10 patients underwent placement of ECLS after out-of hospital AMI. All AMI patients required intubation for respiratory failure and temporary CPR for cardiovascular collapse before initiation of ECLS. Of the 10 AMI patients placed on ECLS, four (40%) are currently long-term survivors (5.1 +/- 4.2 years; range, 6 months to 11 years). All survivors underwent successful revascularization after placement on ECLS. The cause of death in the other six patients was neurologic insufficiency in two, ineffective ECLS in two, and recurrent cardiovascular collapse after weaning from bypass in two. Total CPR time before initiation of cardiopulmonary bypass was 17 +/- 10.3 minutes for the survivors and 54.2 +/-11.1 minutes for the nonsurvivors (p < 0.001). The average time on ECLS was 29 +/- 26 hours for the survivors and 30 +/-67 hours for the nonsurvivors (p = NS). Leg complications were common among long-term survivors, associated with the use of ECLS (three ischemia, one infection). After AMI and cardiovascular collapse, insertion of ECLS may permit long-term patient survival.