As a medical professional, I can tell you that an Electrocardiogram (ECG or EKG) is a crucial diagnostic tool for evaluating heart conditions, including angina. However, it's important to note that an ECG may not always detect angina during a resting state. Angina is chest pain or discomfort caused by reduced blood flow to the heart muscle, typically due to the narrowing of the coronary arteries. During an angina attack, an ECG may show changes that indicate ischemia (a lack of blood flow to the heart), but between attacks, the ECG might appear normal. For this reason, doctors may use other diagnostic methods in conjunction with an ECG, such as a stress test. A stress test involves the patient exercising while their heart is monitored, which can provoke symptoms of angina and reveal abnormalities in the ECG that might not be apparent at rest. read more >>

There are several tests your doctor may order to help confirm whether you have angina: Electrocardiogram (ECG or EKG). ... Your doctor can look for patterns among these heartbeats to see if the blood flow through your heart has been slowed or interrupted or if you're having a heart attack. Stress test.read more >>