Dr. (Prof.) Narendra Nath Khanna,MD, DM, FRCP (Lond,), FRCP (Gasg.), FRCP (Edin.), FACC, FESC, FSCAI, FCCP, FAPSIC, FEISI, FICC, FICP, FCSI,is Advisor to Apollo Group of Hospitals in India and is presently working as Senior Consultant in Cardiology & Coordinator of Vascular Services at Indraprastha Apollo Hospital, New Delhi. He is also appointed as Honorary Professor of Cardiology at LPS Institute of Cardiology, GSVM Medical College, Kanpur. Before joining Apollo Group of Hospitals, he worked as Sr. Consultant in Cardiology at Escorts Heart Institute & Research Centre and as Director of Escorts Heart Centre, Kanpur.