Coronary CTA refers to multilayer spiral CT coronary artery imaging, which is generally not harmful to the kidneys, but it is more harmful to the kidneys when patients with renal insufficiency or uremia undergo coronary CTA, or when the dose of contrast agent used is too high.
Coronary CTA is a cardiac contrast-enhanced examination performed by intravenous injection of a certain dose of contrast medium, and the diagnosis can be clarified by analyzing the degree of stenosis of the cardiac vessels (>50%). Coronary CTA requires the injection of a certain dose of contrast agent (containing iodine), which has a certain degree of nephrotoxicity and needs to be excreted through the kidneys, and is usually not harmful to the kidneys.
If the patient himself has renal disease such as renal insufficiency, uremia, etc., the examination of CTA is likely to cause contrast nephropathy, causing an increase in blood creatinine. Usually, when renal function is normal, a single CTA contrast dose can be tolerated by the human body, and it is recommended that the patient should not undergo several consecutive angiographic examinations requiring injection of contrast medium within a short period of time, so as to avoid the use of excessive doses of contrast medium.
In addition, coronary CTA can cause renal harm, but also allergic dermatitis and hepatic insufficiency and other hazards. Whether or not coronary CTA can be performed and how to do it must be performed in a regular medical institution, subject to the judgment of a professional doctor.