A CT coronary angiogram is a scan that gives doctors a clear picture of the arteries supplying blood to the heart. It helps check for blockages or narrowing and is often recommended when symptoms such as chest pain or shortness of breath raise concerns about heart health. Unlike conventional coronary angiography, which involves inserting a catheter, the CT version is non-invasive and generally easier on patients.
Individuals scheduled for this test can be more comfortable if they know what the process involves, how to prepare, and what to expect. That said, unravel the steps, guidelines, and key points on what patients should know, including when to seek a 2nd opinion doctor before deciding on further treatment.
Steps in Preparing for a CT Coronary Angiogram
The first step usually involves a consultation with your doctor. They will review your medical history, any ongoing conditions, and the medication you are taking. This period is also the time to mention allergies, especially to iodine-based contrast dye, which is used during the scan. Prior to the scan, you may also be asked to undergo an echocardiogram. This initial test is typically non-invasive and is used to assess the heart’s function, structure, and valves. Echocardiogram cost in Singapore can be covered by MediSave provided that the clinic accepts such arrangements.
On the day of the scan, you’ll likely be asked not to eat or drink for a few hours beforehand. This approach helps reduce nausea and ensures proper results. Some medications may need adjusting, particularly those for diabetes, blood pressure, or blood thinning. Your doctor will provide specific instructions depending on your situation.
You may be given beta-blockers to slow your heart rate or nitroglycerin to widen the arteries and get the most accurate images. Once you’re at the imaging centre, an IV line will be placed in your arm for the dye injection. During the scan itself, you’ll lie still on a table as the CT machine takes detailed pictures of your heart. The scan itself is quick, usually 10–20 minutes, though preparation and observation afterwards mean you should allow more time for the visit.
Guidelines to Follow Before the Procedure
Some practical steps make the process smoother and safer. Wear loose clothing and remove jewellery or anything metal, as these can interfere with the scan. Let your heart doctor in Singapore know if you are pregnant, breastfeeding, or have kidney problems, since the contrast dye may not be suitable in these cases.
Staying hydrated before the fasting period helps your body flush out the dye afterwards. Let your doctor know in advance if you have asthma, thyroid conditions, or have reacted to contrast dye in the past. You may also be asked to take a blood test to check kidney function.
Avoid caffeine and smoking for at least 12 hours before the scan. Both can raise your heart rate and make it harder to get clear images. Coronary angiography in Singapore is standardised, meaning it is accompanied by a checklist of instructions that hospitals and clinics will strictly follow.
What Patients Should Know
It’s necessary to understand what a CT coronary angiogram can and cannot do. The test shows whether the arteries are narrowed or have calcium build-up, but it does not allow for immediate treatment, like stent placement. Conventional coronary angiography remains the standard in cases where intervention might be needed on the spot.
There are some risks, though they are generally low. These include exposure to radiation and possible allergic reactions to the dye. The benefits outweigh these concerns for most patients, but if you are unsure, it can be helpful to consult a 2nd opinion doctor. They can review your symptoms, history, and test results to know whether the scan is necessary or if another approach might be more suitable.
You should also be aware that sometimes the results are not the final word. A CT scan may lead to further testing, including invasive coronary angiography, particularly if significant narrowing is found. Being prepared for that possibility helps set realistic expectations about the process.
Conclusion
Preparing for a CT coronary angiogram is straightforward once you know the steps and guidelines. Understanding what the test involves, what it can reveal, and when to seek a 2nd opinion helps patients make informed decisions. Having this clarity allows you to approach the procedure with confidence and focus on what matters most—clear answers about your heart health.
Visit Dr Leslie Tay and speak to a cardiologist today.
