How accurate is angiography

There is no such thing as accuracy in angiography, which is still the gold standard for the diagnosis of cardiovascular disease and certain neoplastic conditions.
Angiography is a test in which a contrast agent with a density different from that of human tissue is injected into a blood vessel, and an abnormality is observed by imaging. It is mainly used for the examination of vascular stenosis, atherosclerosis, and vascular occlusive diseases, for which it has a 100% accuracy rate and is the gold standard for diagnosing diseases.
Specifically, it includes ultrasonography, CT angiography, and digital subtraction angiography. Angiography is an invasive test, and there is a risk of complications such as allergy to the contrast medium and damage to the blood vessels.
Angiography is the gold standard in the examination of vascular stenosis and arteriosclerosis, and any discomfort after the examination should be treated promptly under the guidance of a doctor.