seeking additional data
most case of acute myocardial infarction can be identified by a thorough history and physical examination and a 12-lead echocardiogram (ECG).according to Goel and Kapadia, "92% to 98% of cases of [acute myocardial infarction (AMI)] and approximately 90% of cases with unstable angina can be identified with a history,physical exam and ECG."Although the percentage of correct diagnosis is high, evidence has shown that between 2% and 4% of patients who present to the emergency department with chest pain are misdiagnosed and discharged inappropriately.In these situations, additional data are needed to confirm the diagnosis .Serial enzyme levels,including troponin I or troponin T,as well as creatinins kinase-myocardial band (CK-MB) are needed.