Dr David O’Donnell is a Cardiologist and Electrophysiologist, and the CEO of Advara HeartCare, Sleep and Respiratory. He has a long-standing clinical interest in arrhythmias, and specialises in atrial fibrillation, with a specific interest in athletes with atrial fibrillation. In recent years, his clinical and research focus has been on pioneering the newest techniques for Cardiac Resynchronisation Therapy (CRT) devices in heart failure patients.