Cardiac ECT is a kind of myocardial nuclear scanning test, the main purpose of which is to observe the situation of myocardial blood perfusion, so as to determine whether there is myocardial ischemia and necrosis.
Cardiac ECT is divided into static test and dynamic test. Static test means it is performed in a quiet state, while dynamic test, i.e. cardiac load test, means the heart is in an agitated state after the patient exercises or injects a certain amount of drugs to make the heart in an agitated state, so as to observe whether there is myocardial ischemia or not.
The specific operation method is to inject a certain dose of radioisotope intravenously and then conduct a heart scan to observe the distribution of the isotope in the myocardium. A low or sparse distribution is usually indicative of reduced blood supply. The patient should breathe steadily during the examination to minimize the interference of diaphragmatic movement on the myocardial image.
It should be noted that cardiac ECT, unlike coronary angiography or CT, cannot directly determine the degree of coronary artery stenosis. It is recommended that patients with heart disease choose an appropriate and effective test under the guidance of a physician to assist in the diagnosis of the disease.