How is cardiovascular angiography performed, and does it have significant effects on the body?

Under normal circumstances, cardiovascular angiography involves injecting contrast agent through a cardiac catheter into certain areas of the heart and major blood vessels to visualize the cardiac structures, followed by rapid imaging. This procedure generally does not cause significant harm to the body. The specific steps are as follows:

1. Puncture the femoral artery in the thigh or the radial artery in the wrist.

2. After inserting the catheter, selectively guide it into the openings of the left and right coronary arteries at the root of the aorta.

3. Inject an appropriate amount of contrast agent into the coronary arteries via the catheter.

4. Perform X-ray cineangiography during contrast injection to clearly display the anatomical structure and any pathological changes of the heart and major blood vessels.

Cardiovascular angiography is a common diagnostic procedure in the cardiovascular system and has significant value in diagnosing coronary heart disease. To avoid potential harm, it is recommended to determine the presence of indications for coronary angiography under the guidance of a qualified physician, and to perform the examination only after ruling out contraindications.