Abstract 19771: Persistent Thrombocytopenia after Myocardial Infarction is Associated with Increased Short- and Long-Term Mortality

Background: Thrombocytopenia (TCP) occurs commonly in patients hospitalized with acute myocardial infarction (AMI). It is unclear whether persistent TCP after discharge among AMI survivors is associated with worse outcomes. Methods: We examined the impact of persistent post-discharge TCP on outcomes in a registry of consecutive AMI patients hospitalized between January 2004 and December 2007. In-hospital (IH) TCP was defined by a nadir platelet count < 150 x 109/L. Resolved TCP was defined as IH TCP which resolved within 3 months after discharge while persistent TCP was defined as IH TCP which did not resolve within 3 months. Results: Of 842 patients hospitalized for a first AMI, we examined data on 617 hospital survivors who had follow-up within 3 months of discharge and documented long-term outcomes. Of those, 474 (76.8%) patients did not experience IH TCP while 42 (6.8%) and 101 (16.4%) had persistent and resolved TCP, respectively (Table). Patients with persistent TCP were older, had worse comorbiditi...