Patients with myocardial infarction require the following comprehensive assessments: 1. Electrocardiogram (ECG). An ECG is an essential test that can reveal specific changes associated with myocardial infarction. 2. Cardiac echocardiography. This imaging test can reflect the activity of the ventricular walls and cardiac function. 3. Laboratory tests, such as complete blood count (CBC). A CBC can show increases in total white blood cell count and C-reactive protein, along with tests for cardiac biomarkers. These cardiac biomarkers help to determine the extent of myocardial infarction. 4. Coronary angiography. Coronary angiography is the gold standard for diagnosing coronary heart disease. Patients with myocardial infarction need an urgent evaluation to determine the degree of narrowing in the coronary arteries, and if necessary, stent placement treatment should be considered.