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1. Diagnosis of patient is Acute Myocardial infarction.

Creatinine phosphokinase is 3 types
a) CK-MM derived from skeletal muscle;
b) CK-BB derived from brain and lungs; and
c) CK-MB, mainly from cardiac muscles and insignificant
amount from extracardiac tissue.

A ratio of CK-MB2: CK-MB1 above 1.5 is highly sensitive for the diagnosis of acute MI after 4-6 hours of onset of myocardial ischaemia. CK-MB disappears from blood by 48 hours.So, in above lan tests , thre is decreasing levels of ck with the time.

Lactate dehydrogenase (LDH)

Estimation of ratio of LDH-1: LDH-2 above 1 is reasonably helpful in making a diagnosis. LDH levels begin to rise after 24 hours, reach peak in 3 to 6 days and return to normal in 14 days. In above tests peak levels of ld confirms the diagnosis.

2.Myoglobin and troponin.

myoglobin-it is first cardiac marker that elevates after ami and returns to normal after 24h.

troponin- gradually increase , peak at 24 h and then gradually decrease .

They remain elevated for longer duration of time.