MSCT of the heart (coronary angiography) with contrast
MSCT coronary angiography is a noninvasive diagnostic procedure of the state of the coronary arteries. It is used to identify pathological processes in these blood vessels and helps to determine the choice of prevention or treatment of coronary heart disease. Coronary arteries – the vessels that deliver oxygenated blood to the heart muscle, nourishing it. Besides them, there are other arteries supplying the heart, so the stenosis may be extremely critical for the patient.
Advantages of multislice computed tomography in the study of coronary blood flow
Non-invasive and quick studies — important advantages for application of the method in a large flow of patients. The procedure takes 10 – 15 minutes, including laying the patient. In addition, a coronary angiography can be performed even on an outpatient basis, without using sedative drugs.
Coronary angiography by multislice computed tomography is performed if necessary to confirm or exclude significant stenosis in patients with low and intermediate probability of having coronary heart disease. In cases where it is impossible to get an MRI or Echo, multislice computed coronary angiography reveals blood clots in the cavities of the heart. Patient complaints for chest pain or malfunction of the heart indications for its direction on MSCT. Before extensive surgical procedures coronary angiography is performed to exclude significant stenosis of blood vessels supplying the heart muscle, even if the operation be not in the heart. The mixed results of angiography or other studies (e.g., stress test) can be specified by means of multislice computed coronary angiography. CT is useful for assessment of aorto — mammarocoronary bypass grafts and coronary stents, and even compulsory to hold for congenital anomalies of the heart arteries.
Contraindications to the use of the method is the constant form of atrial fibrillation, frequent extrasystoles. MSCT diagnosis of the coronary arteries of the heart vessels is not carried out in the presence of individual contraindications to administration of iodinated contrast agents. Usually, this severe violations of kidney function (serum creatinine more than 1.5 mg/DL), severe Allergy to contrast in history (shock, collapse, convulsions, stopping the heart or respiratory activities), severe bronchial asthma and hyperthyroidism.
How to prepare for a computed tomography?
Multislice computed tomography – one of the most easily borne by patients research. In addition, it does not require tedious preparation: you should come to CT on an empty stomach (after at least three hours from last meal). On the day of examination do not need to take drugs that cause palpitations (theophylline, atropine, caffeine).
To conduct MSCT requires that the heart rate was less than 65 beats per minute. But don’t worry if at rest your heart beats more often if there are no contraindications, the medical staff will give you special the drug (from the group of beta-blockers), which reduce the heart rate.
No need to worry and those patients who have Allergy to iodinated contrast media, but for some reason it is still necessary to get tested for CT with contrast: these patients hold special premedication with glucocorticoids and antihistamines.
Patient establish peripheral venous catheter and placed on the table, the study is conducted on the back with your hands and lasts 10 to 15 minutes.
Other studies of blood flow by computed tomography
MSCT angiography is a noninvasive and highly accurate method of evaluating vascular structures throughout the process. Angiography from coronary angiography differs in that it evaluates the aorta and peripheral vessels and not the arteries that supply the heart. MSCT-angiography is the preferred method when an aneurysm, dissection or rupture of the wall of the aorta, pulmonary embolism and other types of thrombosis. Everything else, currently, angiography – a method of preoperative studies of the aorta and peripheral vessels. Contraindications and necessary preparation for angiography coincide with those of MSCT coronary angiography.
Place methods multislice computed tomography in the evaluation of blood supply
MSCT is a method that combines the advantages of ultrasound and MRI, but not with flaws. The combination of CT angiography and CT-angiography allows to evaluate blood flow to the heart and the health of the nervous system in General.