Jeff Healey is a Cardiologist/Electrophysiologist and Professor of Medicine at McMaster University. He is the director of the division of cardiology, and the Connolly Chair for Cardiology Research at the Population Health Research Institute. He is the chair of the Canadian Stroke Prevention and Intervention Network (CSPIN) and past chair of the Canadian atrial fibrillation guidelines committee.
He was the lead author of the ASSERT trial, which was published in the New England Journal of Medicine in 2012 and demonstrated the increased stroke risk associated with sub-clinical atrial fibrillation detected by pacemakers. He was also the lead author of the RELY AF cohort study, a 15,000-patient worldwide registry, published in the Lancet in 2016, examining the causes, treatment and outcomes in patients with atrial fibrillation.

He currently leads the ARTESIA trial, evaluating the role of anticoagulation in patients with subclinical AF, and the LAAOS-4 study, examining the role of left percutaneous left atrial appendage closure in high-risk patients with atrial fibrillation who are receiving oral anticoagulation.