First 6 hours Once informed consent was obtained, the patient was then enrolled. They were put on continuous ECG monitoring. Ten mls of blood were drawn at 0,3,6 hours after arrival at the ED for myoglobin, CKMB and TnT analysis. Blood for LDL & HDL were also drawn at 0 hour as well with the cardiac markers. The old hospital case record of patient, if available, were retrieved and previous ECG's were also compared against the new ECG.