In earlier times, bypass surgery was done as an open heart procedure which had lot of disadvantages. Owing to the disadvantages and whole body inflammatory response, minimal invasive surgery was introduced to avoid the use of heart-lung machine. Dr. O P. Yadava, Chief Cardiac Surgeon, National Heart Institute talks about minimal invasive bypass surgeries and Treatement  in this video. He describes about different forms of minimal invasive surgeries used currently and which helps to avoid pulmonary complications, deep wound infections and also disadvantages which were caused due to open heart bypass surgery.