Nigel Tan is a cardiologist with a clinical practice focused on cardiac electrophysiology, which involves the diagnosis and treatment of arrhythmias. He received his medical degree and completed internal medicine and cardiology training at the University of Toronto, and a fellowship in cardiac electrophysiology at St. Michael's Hospital.

His current research interests include the use of digital technology in the diagnosis and management of arrhythmias, optimizing risk prediction in sudden cardiac death, and arrhythmia risk among patients with myocardial infarction.