Dr. Kumar has been associated with Lilavati Hospital for 18 years. He has an overall experience of 26 years. Dr. Kumar has done over 10000 cases. He has spent many years in the field of coronary bypass surgery and complex cardiac procedures at Karolinska Hospital, Stockholm, Sweden. He further gained invaluable experience at the Harefield Hospital, Harefield, London, UK in homograft surgery, pediatric cardiac surgery & heart lung transplantation. Dr. Kumar is one of the first doctors to perform beating heart surgery, since 1996 for CABG and has performed many hundred operations with this technique. He was the first in India to use MECC (Micro Extra Corporeal System).