<prompt> Preferred biochemical markers in patients presenting with myocardial infarction:MyoglobinCardiac specific TroponinsCK-MBAll of the above  <response>: Cardiac specific Troponins TROP I TROP II Myoglobin affects skeletal muscle also so we cannot see if its the case of M.I TROP I: Within 3 hrs CK-MB: 4 hrs 