Numerous human cardiac stem cell studies have been published, including relatively small number of patients. Meta-analysis of randomized trials have reported safety and a 3-6% increase in global left ventricular performance after intracoronary stem cell therapy in patients with acute myocardial infarction. Since most of the studies used different type of stem cells, delivery modes, and patient population, the results are heterogenous, therefore the comparison of the results is biased regarding generalizable conclusions about the effect of treatment. The present comparative meta-analysis is based on individual patient data, and gathers and pools the raw data, and analyzes the clinical outcome, safety and efficacy of the cardiac stem cell therapy.