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<span>The subject tells what the sentence is about; it contains the main noun or noun phrase. </span>
Open heart surgery is a serious procedure that needs urgent post-operative care and constant observation. After the surgery, it's typical for a patient to have further treatment in the intensive care unit (ICU) for a few days.
Any procedure in which the chest is opened and the heart's muscles, valves, or arteries are operated on is considered open-heart surgery.
The most typical kind of adult cardiac surgery is coronary artery bypass grafting (CABG), according to the National Heart, Lung, and Blood Institute (NHLBI)Trusted Source. A healthy artery or vein is grafted (connected) to a blocked coronary artery during this procedure. This enables the transplanted artery to "bypass" the obstructed artery and supply the heart with new blood.
Traditional heart surgery is another name for open-heart surgery. Many modern cardiac treatments may now be carried out using only tiny incisions rather than large ones. Therefore, it may be deceptive to refer to open heart surgery as such.
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