Ensure blood supply: The question is a little vague but i will try to explain. The small arteries to the heart (the coronary arteries) are what supply blood to the hearyt to keep it pumping. The big artery from the heart supplies the systemic circulation. If the small arteries get blocked, then you have a heart attack and may die. Any surgical proceedure may put enough stress on the heart to have a heart attack.
Answered 6/25/2018
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