Cardiothoracic surgery is the arena of medicine involved in surgical treatment of organs inside the chest generally dealing of conditions of the heart and lungs. Cardiac surgery and thoracic surgery are separate operating specialties. Cardiovascular surgery is operation on the heart done by cardiac specialists. Normally, it is done to treat complications of ischemic disease, correct congenital heart disease, or treat valvular heart disease from various causes including, rheumatic heart disease, atherosclerosis and endocarditis. Heart transplantation also comes under this category. Cardiothoracic surgery is the operating procedure to treat of organs inside the thoracic cavity. Cardiac operation and thoracic operation are separate surgical specialties. Bi-pass heart surgery is an operating procedure in which heart is opened and operation is performed on the internal constructions of the heart. In minimally invasive surgery machine is used to perform the operation.