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Study: Blood transfusion associated with increased risk of death for patients with heart attack
Date:12/24/2012

CHICAGO A meta-analysis of 10 studies suggests that receipt of a blood transfusion among patients with myocardial infarction (heart attack) was associated with increased all-cause mortality compared with not receiving a blood transfusion during heart attack, according to a report published Online First by Archives of Internal Medicine, a JAMA Network publication.

Therapeutic measures including anticoagulation and antiplatelet drugs have "revolutionized" the approach to acute coronary syndrome and improved clinical outcomes. However, some of these therapies may also increase the risk for bleeding, which can lead to patients developing anemia during their hospital stay and requiring blood transfusion, according to the study background.

Saurav Chatterjee, M.D., of Brown University and Providence Veterans Affairs Medical Center, Rhode Island, and colleagues conducted a review of studies published between January 1966 and March 2012. Ten studies, including 203,665 participants, were selected for analysis. Only one study was a randomized trial, while the others were observational studies.

"Analyses of blood transfusion in myocardial infarction revealed increased all-cause mortality associated with a strategy of blood transfusion vs. no blood transfusion during myocardial infarction (18.2 percent vs. 10.2 percent), with a weighted absolute risk increase of 12 percent," the authors comment.

Other statistical analyses suggest that blood transfusion was associated with a higher risk for mortality independent of baseline hemoglobin level, nadir hemoglobin level and change in hemoglobin level during the hospital stay. Blood transfusion also appeared to be associated with a higher risk for subsequent myocardial infarction (risk ratio, 2.04), according to the study results.

"In conclusion, this meta-analysis provides evidence that rates of all-cause mortality and subsequent myocardial infarction are significantly higher
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Contact: David Orenstein
David_Orenstein@brown.edu
401-863-1862
JAMA and Archives Journals
Source:Eurekalert

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