| Summary: | Myocardial regeneration after intracoronary injection of autologous bone marrow-derived mononuclear cells in patients with large anterior acute myocardial infarction and late reperfusion Objective and background: Despite the use of reperfusion therapies, outcomes in patients with large ST elevation myocardial infarction (STEMI), late reperfusion and left ventricular (LV) dysfunction is poor. We investigated longterm safety and efficacy of intracoronary injections of autologous bone marrow-derived mononuclear cells (BMNCs). Methods: 27 patients with anterior STEMI (age 59 ± 12 yrs, mean baseline LV ejection fraction (LVEF) 39±5%), who underwent percutaneous coronary intervention 4-24 hours after the onset of symptoms, were randomly assigned either to intracoronary BMNCs injection (n = 17, BMNCs group, out of which 14 underwent longterm follow-up), or to standard therapy (n = 10, Control group). The LVEF, the LV end-diastolic and end-systolic volumes (LVEDV, LVESV) and diastolic function (transmitral flow, pulmonary vein flow) were assessed by echocardiography at discharge, month 4 and 24. Myocardial perfusion was assessed using SPECT at baseline and month 4. Results: At 24-month, there was no difference in rates of serious clinical events (36% vs. 50%, p=0,54). At Month 4 LVEF improved to similar extent in...
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