CT Angiography is the “New gold standard” method for Coronary Artery Disease to diagnose without pain and hospitalization. A computed tomography Angiography is a test that uses X-rays to provide detailed pictures of the and the blood vessels that go to the heart, lung, brain, kidneys, head, neck, legs, and arms.
A CT angiogram can show whether a blood vessel is blocked, where the blockage is, and how big the blockage is. The test can also show whether there is a bulge (aneurysm) or a buildup of fatty material called plaque in a blood vessel.
During a CT angiogram, you lie on a table that passes through a doughnut-shaped opening in the scanner. A special dye (contrast material) is put in a vein (IV) in your forearm or hand to make the blood vessels easier to see on the scan. If you are having a CT angiogram to look at your heart and the blood vessels that go to it (coronary arteries), you may be given a medicine called a beta-blocker to slow your heart rate during the test.
Why is CT Angiography Done?
A CT angiogram is done to look for:
- A narrowing (stenosis) or blockage in the coronary arteries. This can occur when there is a buildup of fat (cholesterol) and calcium in the arteries. This buildup is called plaque.
- Heart problems, such as pericarditis (a buildup of fluid around the heart) and damage or injury to the heart valves.
- A bulge (aneurysm) or tear (dissection) in the aorta ,which is a large blood vessel that carries blood from the heart to the rest of the body.>
- A blood clot in the lungs (pulmonary embolism).
- A narrowing of the veins in the leg (peripheral arterial disease).
An abnormal pattern of blood vessels that may be a sign of a tumor.
How to prepare for the CT Angiography?
Before you have a CT angiogram, tell the technician or Radiologist if you:
- Are pregnant or breast-feeding.
- Allergic to any medicines including iodine dyes.
- Have a heart condition, such as heart failure.
- Have diabetes or take metformin to control your diabetes.
- Have a history of kidney problems.
- Have asthma.
- Have a history of thyroid problems.
- Have had multiple myeloma.
- Have had an X-ray test using barium contrast material (such as a barium enema) or have taken a medicine that contains bismuth (such as Pepto-Bismol) in the past 4 days. Barium and bismuth show up on X-ray films and make it hard to see the picture clearly.
- You may be asked not to eat or drink anything for several hours before the test. Your doctor will let you know if there are certain foods or liquids you should avoid.
- Talk to your doctor about any concerns you have regarding the need for the test, its risks, how it will be done, or what the results will mean. To help you understand the importance of this test, fill the Consent form .
How long does it take for CT Coronary Angiogram?
The actual scan takes just few seconds even less than a minute. But, you need to be prepared for the scan which takes 30 minutes to 1 hour. So, your stay in diagnostic centre can be from 1-2 hours.
Is there any risk in undergoing this investigation?
Like conventional angiogram CT Coronary angiogram also uses X-ray radiation. But, the levels of radiation used are minimal below any harmful levels. It has very low exposure to radiation, almost 66% less than other CT scanners.
Which machine you have for CT Angiography ?
We have Somatom Definition AS 194 slice/sec most advanced Multi Slice Spiral CT Scanner from Siemens. It offers unprecedented image quality, delivering 194 slices per second which is fastest & unmatched in the industry. Now, any examination is completed in a matter of seconds and that includes non-invasive coronary artery evaluation.
- Ultra High Resolution – Reveals even the finest details with ease
- Wider Applications – From routine brain to whole body angiography.
- Increased patient comfort- shorter scan time & more comfort in scanning.
- Safest scanner- very low exposure to radiation – almost 66% less than other CT scanners.
How well this machine works?
This machine is BEST for CARDIAC SCANS
- Coronary Angiography is done in just few seconds even less than a minute
- Excellent visualization of stenosis
- Calcified & soft plaque evaluation
- Stent evaluation
- Significant reduction of stent struts & blooming artifacts
- Evaluation of malignant RCA
- Evaluation of myocardial bridge
- Post CABG evaluation
- Triple rule- out
- Myocardial infarction, aortic dissection & pulmonary embolism, all three can be completed with a single injection of contrast in 12 seconds.