An electrocardiogram (ECG) can be done to detect signs associated with coronary artery disease, but it cannot be relied upon exclusively to diagnose coronary artery disease. Compared to a regular ECG, an exercise ECG (active plate) or an ambulatory ECG (Holter) is of greater diagnostic value for coronary heart disease. Exercise ECG is where the patient is monitored for ECG changes during exercise, such as inducing an angina attack or detecting exercise-related ST-T changes, which are highly suggestive of coronary artery disease. An ambulatory ECG is performed in the hope of capturing a patient’s symptomatic episode through longer-range ECG monitoring, and also suggests the possibility of coronary artery disease if there are typical ischemic changes on the ECG at the time of the episode. Other tests that can diagnose coronary artery disease include nuclear myocardial dynamic imaging, coronary CT or coronary angiography. Patients with suspected coronary artery disease are advised to go to a regular hospital to avoid delays in treatment.
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