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A new study assessed patients having heart surgery, measured troponin before and daily for the first few days after surgery, and assessed death and the incidence of major vascular complications — such as heart attack, stroke or life-threatening blood clot — after heart surgery. The study involved 15,984 adult patients with an average age just over 63 years undergoing cardiac surgery. Patients were from 12 countries, with more than a third of the countries being outside of North America and Europe.