A CT coronary angiogram is an imaging test to detect blockages or other issues in the coronary arteries. This procedure provides valuable insights into the condition of your heart and helps guide treatment decisions. Here’s an overview of what to expect during the procedure with essential details on preparation and follow-up steps.
Understanding a CT Coronary Angiogram
A CT coronary angiogram uses advanced imaging technology to produce detailed pictures of the coronary arteries. The process involves injecting a contrast dye to highlight blood vessels and determine if there are blockages or narrowing. A CT calcium score may also be calculated during the procedure. This score helps assess the level of calcium deposits in the arteries, providing an additional measure of heart disease risk.
Preparation for the Procedure
Before undergoing a CT coronary angiogram, your doctor will provide specific instructions to ensure accurate results. You may be required to fast for several hours before the test to reduce the risk of nausea and ensure clearer imaging. It is also essential to inform your doctor of any medications you are taking, as certain drugs, such as those containing metformin, may need to be paused temporarily. In some cases, beta-blockers might be prescribed to slow your heart rate, allowing for clearer and more precise imaging.
Additionally, you may be asked to wear loose clothing for comfort and to remove any jewellery or metallic accessories, as these can interfere with the imaging process. Following these preparation guidelines will help ensure a smooth and effective procedure.
What Happens During the Procedure
The procedure typically lasts 30 to 60 minutes and involves the following steps:
- Initial Preparation – Upon arrival, you will lie on a motorised table connected to the CT scanner. To keep track of your heart rate, you will have electrodes on your chest area.\
- Injection of Contrast Dye – A contrast dye is injected into a vein in your arm to make your arteries visible on the CT images. You may feel a brief warm sensation or a metallic taste in your mouth when the dye is administered.
- Breath-Holding Instructions – You will be asked to hold your breath for a few seconds while the scanner captures images of your heart. This minimises motion and enhances image clarity.
- Scanning Process – The CT scanner rotates around your chest to take detailed cross-sectional images of your coronary arteries. The process is painless, but it’s important to remain still to ensure accurate results.
Post-Procedure Care
Once the procedure is complete, you can usually resume normal activities immediately. Your doctor will review the images and discuss the results with you. A CT calcium score is part of the assessment if performed alongside the procedure. Once the results are out, your doctor may recommend lifestyle changes, medications, or further diagnostic tests.
Risks and Considerations
A CT coronary angiogram is generally considered a safe and effective diagnostic procedure, but there are some potential risks. The test involves exposure to a small amount of radiation, though the benefits of detecting heart conditions often outweigh this risk. Another consideration is using contrast dye, which can occasionally cause allergic reactions in some individuals. It is important to inform your doctor if you have a history of dye allergies. Additionally, some patients may experience mild discomfort, such as a warm sensation or temporary nausea, but these effects typically resolve quickly.
Benefits of a CT Coronary Angiogram
A CT coronary angiogram provides several benefits, making it a valuable diagnostic tool. It enables the early detection of heart issues by identifying blockages or narrowing in the coronary arteries. As a non-invasive procedure, it eliminates the need for a catheter, offering a safer and more comfortable option with minimal recovery time. The high-resolution imaging produced during the test delivers detailed views of the coronary arteries and surrounding structures, supporting accurate diagnosis and treatment planning.
Conclusion
A CT coronary angiogram is valuable for assessing heart health and identifying potential issues before they escalate. Patients can confidently approach the procedure by understanding the process, risks, and benefits. Whether you’re monitoring existing heart conditions or seeking preventative care, this test is critical in modern cardiovascular diagnosis.
For professional consultations, contact Dr. Leslie Tay for advice and personalised care.
