Aspirin withdrawal may pose risk to coronary patients

(Orlando, Florida, October 29, 2003) -- Patients with coronary artery disease who stop taking aspirin may be at risk for developing withdrawal-related coronary events, says a new study presented at CHEST 2003, the 69th annual international scientific assembly of the American College of Chest Physicians (ACCP). The study found that previously stable coronary patients experienced coronary events, including unstable angina and myocardial infarction (heart attack), within one week of aspirin withdrawal.

"The benefits of aspirin therapy in coronary patients are well known. However, the effects that aspirin withdrawal has on this group of patients are just now being studied," said lead author Emile Ferrari, MD, Professor of Cardiology, University Hospital Pasteur, Nice, France. "Our study shows that aspirin therapy can not be safely stopped in any case, but especially in patients with a history of coronary disease."

Researchers from University Hospital Pasteur reviewed the cases of 1,236 patients hospitalized for coronary syndromes to determine which patients were hospitalized due to treatment withdrawal. Of those hospitalized, 51patients experienced acute coronary events, including unstable angina, stent thrombosis, and heart attacks, less than one week after aspirin withdrawal. Prior to hospitalization, patients had been taking aspirin for at least three months. Although patients had a history of heart attacks and stable angina, none had an unstable coronary event prior to aspirin withdrawal. Reasons for aspirin withdrawal included minor surgery, dental treatment, and non-compliance. Aspirin therapy is standard in patients with coronary artery disease because of its ability to thin the blood and reduce the risk of developing acute blockage in the coronary arteries.

"Coronary patients preparing for dental work or surgery are often advised to stop taking aspirin in order to avoid increased bleeding," said Dr. Ferrari. "Our study serves as

Contact: Arielle Green
American College of Chest Physicians

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