]> 2026-07-31T16:30:51+00:00 WBR0354 0 en Troponin '''Incorrect''' Troponin starts to rise at 4-6 hours and remains elevated for 10-14 days. Therefore, elevated troponin within this window would not be specific for reinfarction. Myoglobin '''Incorrect''' Myoglobin can be used to detect reinfarction but it is less specific than CK-MB Electrocardiogram '''incorrect''' Electrocardiogram also helps in diagnosing reinfarction , however CK-MB along with Electrocardiogram is the better option Cardiac auscultation '''Incorrect''' Cardiac auscultation can help in diagnosing pericarditis when pericardial rub is appreciated but it has no value in diagnosing infarction. Electrocardiogram and CK-MB levels CK MB returns to normal level 2 days after infarction Therefore, it is a useful diagnostic criterion for a second MI outside of a 2 day window.Electrocardiogram will help to confirm the diagnosis by showings new changes, particularly in the ST segments Electrocardiogram demonstrates an up to date image of the heart electrical activity. . Cardiac enzymes Troponin, Myoglobin and CK-MB start to rise after infarction of cardiac muscle with various kinetics.The first cardiac injury marker to rise is myoglobin at 1-4 hours and reaches baseline in 1-2 days. CK MB rises at 4-6 hours and becomes normal in 1-2 days. Finally,Troponin starts to rise at 4-6 hours and remains elevated for 10-14 days. Therefore, to diagnose a reinfarction, perform an electrocardiogram and measure CK-MB as the raised levels from previous infarction become normal on the second day. '''Educational Objective:'''CK-MB returns to normal levels 2 days after infarction. Therefore, its is a useful diagnostic criterion for a second MI outside of a 2 day window. Electrocardiogram will help to confirm the diagnosis by showing new changes, particularly in the ST segments . '''References:''' 66 Master the boards Step 2 Ck second edition<br/> '''Educational Objective:''' <br/> '''References:''' Internal medicine Neeraja Danda M.B.B.S A 55 year old male presented to the emergency room with acute chest pain and diaphoresis . Electrocardiogram revealed ST segment elevation in leads V2 – V4 . Aspirin was administered and the patient was sent for coronary angiography, which revealed a 75% stenosis in the left main coronary artery . Angioplasty was performed immediately thereafter. On the fourth day following angioplasty, the patient began to experience chest pain again .Which of the following would be helpful in diagnosing a reinfarction? E Cardiovascular 2020-10-28T00:16:30Z 2459150.5114583 WBR0354