Question category: Cardiology
A 50 year old man was admitted with central crushing chest pain. He is a smoker and is on ramipril fro hypertension which has not been well controlled. He is found to have ST depression in leads I, II, aVL, V4 V6 and his 12 hour troponin was 1.0. He underwent angiography and stent insertion. Three days later he is complaining of the same crushing central chest pain. A repeat ECG showed the same ST depression. Which enzyme should be measured to assess if there is further damage to the myocardium?