Study: Gender may not increase risk of heart attack deaths

Feb 21 2011

A study led by the University of Michigan Cardiovascular Center shows being a woman may not increase your risk of dying from treatment for a severe heart attack.

U-M researchers and colleagues in the Michigan Cardiovascular Consortium found women who received treatment such as an angioplasty had higher unadjusted in-hospital heart attack deaths.

But these differences appear to be related to women's ages and additional health problems - not gender, says study lead author Elizabeth Jackson, M.D., M.P.H., an assistant professor of internal medicine at the U-M Health System.

"When we adjusted for factors such as age and co-morbidities like hypertension and diabetes, women had similar mortality rates at the time of the heart attack as men," says Jackson.

"But women still appear to be more likely to have a bleeding episode in the hospital that requires a transfusion or vascular complications," she says.

The five-year study published in the American Heart Journal showed that compared with men, women were older with more co-morbidities - a medical condition in addition to the primary disease - at the time of treatment.

Women account for about one-third of patients who undergo procedures such as percutaneous coronary interventions to clear the clogged arteries causing a heart attack.

Researchers examined the outcomes of 8,771 patients undergoing a procedure for an acute ST-elevation myocardial infarction, commonly known as a severe heart attack.

Patients were part of the Blue Cross Blue Shield of Michigan Cardiovascular Consortium registry, a physician-led quality improvement collaborative that is supported by Blue Cross Blue Shield of Michigan and Blue Care Network.

Previous investigations using other registries have found women had higher in-hospital mortality rates than men, but recent advancements in treatment changed how doctors care for these patients and the team wanted to re-investigate with more current data, says Jackson.

"Overall, there have been tremendous improvements in the care of both men and women who suffer a heart attack, but further research on everyday patients, such as those in the registry, is needed to be able to continue improving our level of care," says Jackson.

Source: University of Michigan Cardiovascular Center