Show r WHAr IS A HEART ATTACK I The heart working working muscle of the body requires It a large and supply of to 10 0 its work This is through the coro coro- coroI I J nary arteries which cone com encircle and penetrate the heart muscle as 88 Shown in the drawing A heart attack occurs when the blood flow ow through the coronaries is impeded for tor example h by formation of ofa a 8 clot A 4 Public oj of You o hears u r clot car The clot blocking a main Coro oro nary branch has deprived the shadowed area of blood Alibis th s early stage of ofa a heart attack the must remain inlet Irl to speed healing Some week Creeks later the body's repair system has reduced rI the extent of the injury A Ascar scar lIcar has formed and ond the patient may he gin in to resume activities under the doctors doctor's lolor 8 |