How to Diagnose Myocardial Ischemia

Myocardial ischemia refers to a pathological condition in which reduced coronary blood perfusion leads to insufficient oxygen supply to the heart muscle, resulting in abnormal myocardial energy metabolism and an inability to sustain normal cardiac function. So how is myocardial ischemia diagnosed? Below, we address this question.

How Is Myocardial Ischemia Diagnosed?

Currently, three primary diagnostic methods are commonly used in clinical practice to confirm myocardial ischemia:

1. Electrocardiogram (ECG) testing: By comparing the patient’s resting ECG with the ECG recorded during symptom onset—or by performing exercise stress testing (e.g., treadmill test), ambulatory (Holter) ECG monitoring, or observing dynamic ECG changes—clinicians can determine whether myocardial ischemia is present and make a preliminary assessment of the affected region.

2. Echocardiography: In cases of myocardial infarction or severe myocardial ischemia, regional wall motion abnormalities may occur in the ischemic myocardium. These abnormalities can be detected using cardiac ultrasound (echocardiography).

3. Coronary Computed Tomography Angiography (CTA) or invasive coronary angiography: Coronary CTA involves intravenous injection of contrast medium followed by three-dimensional CT imaging to assess for coronary artery stenosis or occlusion, with an accuracy rate of approximately 80%. Invasive coronary angiography remains the gold standard for diagnosing coronary artery disease and myocardial ischemia. As a minimally invasive procedure, it provides clear visualization of the location and severity of stenotic or occluded coronary vessels—and allows for immediate percutaneous coronary intervention (PCI) to treat the affected vessel during the same procedure.

The above outlines the main approaches used to diagnose myocardial ischemia. We hope this information is helpful to you.