A CT Angiogram to know exactly about your blood vessels! Shall we talk about this?

Sometimes our doctors need to take a closer look at the blood vessels inside our bodies. To be precise, to see if there is any problem inside the blood vessels, if there is a blockage somewhere, if there is a small bulge like a balloon. That is when this special test called a CT Angiogram helps us. Let's see what this is, how it is done, and why it is needed?

What is a CT Angiogram?

Simply put, a CT angiogram is a test that takes detailed pictures of your blood vessels and the tissues around them. It’s like a photo, but much clearer. This test is often done to check for blockages or narrowing in the arteries that supply blood to your heart, called the coronary arteries, or what doctors call coronary artery disease . For this reason, it’s sometimes called a coronary CT angiogram, or CCTA.

What other diseases is a CT angiogram used to diagnose?

This CT angiogram is used to detect many things, not just the blood vessels of the heart. Consider these situations:

• Aneurysm: This is when a blood vessel, for example your aorta or a blood vessel in your brain, bulges abnormally, like a balloon.
• Aortic dissection: This is when there is a tear in the inner layer of the wall of your aorta.
• Arteriovenous malformation: This is a condition where arteries and veins are intertwined, especially in places like the brain.
• Carotid artery disease: A blockage caused by fatty deposits (plaque) in the arteries that carry blood to your brain.
• Peripheral artery disease: A condition in which plaque builds up in the arteries in your legs or arms.
• Pulmonary embolism: A blood clot that becomes lodged in the lungs.
• Spontaneous coronary artery dissection (SCAD): A sudden tear or separation in the wall of a coronary artery in the heart.
• Traumatic injury: When a sharp object hits your chest, neck, or head, causing damage to blood vessels.

Not only that, but sometimes your doctor also uses a CT angiogram to plan ahead for surgery or other medical procedures. For example, it can help you look at your coronary arteries before performing a heart valve replacement, heart bypass surgery, or stent placement.

"Technically, a CT angiogram is the image that comes from this test. CT angiography is the method used to take these images. But as we speak, both are used for the test that you go in for. Some people also call it CTA for short."

How does CT angiography work?

Did you know that even a regular CT scan can take detailed, three-dimensional (3D) images of the inside of our bodies? That’s because the scanner takes hundreds of two-dimensional (2D), flat images. A computer then stitches all of these images together to create high-quality 3D images. However, the biggest difference between a CT scan and a CT angiography is the use of a contrast dye .

This CT scan method, combined with the fluorescent material, makes your blood vessels appear as if they've been 'lit up'. The doctor can rotate this 3D image in all directions. It's like holding a small model of your blood vessel in his hand. This allows him to see each part of the blood vessel from different angles, pinpoint any problems, and plan treatment.

CT angiography is less invasive and carries fewer risks than traditional angiography. In a traditional angiogram, a thin tube called a catheter is inserted into your blood vessel and guided to the area being examined. A CT angiogram does not require a catheter. However, depending on your age and other medical conditions, you may not be a good candidate for a CT angiogram. In that case, you may need to undergo the more invasive traditional angiography procedure mentioned earlier.

How should you prepare before this test?

The doctor who recommended you have a CT angiogram will tell you how to prepare. Typically, you will need to tell the doctor the following:

• About all the medications you are currently taking.
• Your complete medical history, including heart disease, kidney problems, and allergies.
• Have you ever had an allergic reaction to a contrast dye used in a test before?
• Whether you are pregnant or a nursing mother .

The doctor will give you some specific instructions to follow. These may include things like:

• How many hours should I fast for the test, that is, not eat or drink anything?
• Do you need to stop taking any medications you usually take before the test?

When you come for the test, you will be given a hospital gown to wear. You will also need to remove any gold or silver jewelry you are wearing, as they may interfere with the test.

What to expect during a CT angiogram?

CT angiography is usually quick and painless . However, an IV catheter, a small tube, is inserted into a vein in your arm. You are awake and not under anesthesia. You will lie on an exam table. This table is a large circular ring, like a doughnut, that moves around inside. You are not completely confined, as you would be during an MRI scan.

You need to be very still during the test so that the scanner can get good pictures. A specially trained person called a Radiologic Technologist will do your test. He or she will explain each step and tell you what to do (for example, how long to hold your breath). Here's what usually happens:

• You will be made to lie on the exam table.
• It will help you stay comfortable. You may be able to use pillows or straps to keep you in one place.
• An IV will be put into your vein to give you the contrast dye. This will usually be in your arm or groin. The IV will stay in place until the pictures are taken. You may feel a slight warmth as the dye goes in. This is normal, don't worry.
• If the test is to look at your coronary arteries, the doctor will attach small patches (EKG leads) to your chest. This allows the doctor to take pictures that are timed to your heartbeat.
• When everything is ready, the technician will go to a separate room. He or she will be able to see and talk to you through an intercom system.
• The exam table moves back and forth inside the donut-like ring of the scanner. The scanner takes hundreds of images at this time. You may hear a slight buzzing or clicking sound.
• The technologist will tell you when to hold your breath and when to stay still. Even the slightest movement can affect the quality of the images.
• After enough pictures are taken, the IV is removed and a small bandage is placed over the area. You will also be helped to get up from the table. Then the test is over.

You will be in the examination room for about 20 to 60 minutes, including preparation time. You will only be in the scanner for a minute or two. It will be over very quickly. However, the doctor may have to go through the scanner more than once to get all the pictures he needs.

Are there any disadvantages to a CT angiogram?

Depending on your needs and your concerns, there may be some disadvantages to CT angiography. These include:

• Use of contrast dye: This is not a problem for most people. However, sometimes you can have an allergic reaction to this dye. If you have had this before, your doctor may give you a medicine to drink before the test or recommend a different test.
• Low-dose radiation exposure: The amount of radiation you receive from a single test is very low. However, lifetime exposure to radiation may slightly increase your risk of developing cancer. Your doctor will consider all of these. In general, these risks are small compared to the benefits of a CTA.

What happens after a CT angiogram?

Once your test is over, you can return to your normal activities. But you should drink plenty of water and other fluids . This will help the contrast dye leave your body quickly.

What are the results of the CTA?

CT angiography produces detailed images of your blood vessels and the tissues around them, including the capillary beds. These images can show many problems in your blood vessels, such as plaque buildup and aneurysms. A radiologist looks at these images and analyzes them. He or she reports the findings to the doctor who recommended the test for you. The doctor will then talk to you and explain the results.

You may need to see your doctor again (follow-up visits). You may also need to have more tests. Your doctor will tell you what to do next. Don't be afraid to ask questions about the results and how they affect you.

When should I call the doctor?

Talk to your doctor at a time like this:

• If you have any questions while preparing for your CT angiogram.
• If you have questions about the test results .
• If you want to talk about your diagnosis or treatment options .

No matter how much someone tells you that the test is quick and painless, it's normal to feel a little nervous. That's okay. It's normal to feel a little nervous before any test. But you need to remember that the CT angiogram is there to help you. It allows the doctor to see what's going on inside your blood vessels. With those results, you and the doctor can plan the treatment you need for your health.

The most important things we need to remember

Okay, so we've talked a lot about the CT Angiogram. There's no need to be afraid. This is a very important test that is used to get a detailed look at the blood vessels inside your body, especially in places like your heart, brain, and legs. If your doctor asks you to have this test, it means he or she wants to know more about your health. So, follow the instructions carefully, and if you have any questions, be sure to ask the doctor or the technologist who is performing the test. Your cooperation is very important to make this test a success.

` CT angiogram, CT scan, blood vessel examination, heart disease, diagnosis, contrast dye, radiation