Irreversible injury to myocardium in MI occurs earliest by
Answer- C. 20 minuteshlyocardial function is more seflsith'e to kchemia (loss of contractility occurs within 60 seconds) than myocardial structure(irreversible injury occurs in 2O-40 minutes), thus myocardial necrosis begins at approximately 30 minutes after coronary occlusion
Few seconds
10 minutes
20 minutes
40 minutes