Dr. Jeff Healey, MD, MSc, FRCPC, FHRS is a Professor of Medicine and holds the Yusuf Chair of Cardiology at McMaster University, and is a Cardiologist/Electrophysiologist. He is Director of Cardiology at McMaster University, and a Senior Scientist 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. Dr. Healey was the lead author of the ASSERT trial that demonstrated the increased stroke risk associated with sub-clinical atrial fibrillation, and the principal investigator of the ARTESIA trial, which demonstrated that anticoagulation reduces the risk of stroke in patients with subclinical atrial fibrillation. He is also the principal investigator of the LAAOS-4 trial, evaluating the role of left atrial appendage occlusion on top of NOAC therapy for prevention of stroke in high-risk individuals with atrial fibrillation.