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Permanent Continuous Flow Left Ventricular Assist Devices Use After Acute Stabilization for Cardiogenic Shock in Acute Myocardial Infarction.

Cardiogenic shock complicating acute myocardial infarctions (CS-AMIs) carries high mortality rates. Early use of durable continuous flow left ventricular assist devices (CF-LVAD) in these patients has traditionally been discouraged. Therefore we sought to assess the efficacy and complications of CF-LVAD use in CS-AMI after stabilization with temporary mechanical support. From January 2006 to November 2014, nine patients underwent CF-LVAD implant after CS-AMI (Heartmate II, six; HVAD, three). All patients required temporary mechanical circulatory support (MCS) before CF-LVAD implant and were interagency registry for mechanically assisted circulatory support profile 1; average time from MI to CF-LVAD implant was 20 days. Overall seven of nine patients (78%) survived to discharge. Survival at 1, 3, 12, and 48 months was 100%, 89%, 67%, and 67%, respectively. Two patients were successfully bridged to transplant and four patients remain alive on device support. The most common post-LVAD complication was stroke, occurring in 55% of patients. Embolic strokes were mild in severity and all patients survived with only mild deficits; hemorrhagic strokes conferred the highest mortality. This study suggests CF-LVADs are potential but high-risk treatment options for CS-AMI patients who stabilize with temporary support. Further studies will help more clearly delineate the benefits and risks of CF-LVAD implant in this population.

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