By Dr. Apurba Kumar Sarma, MCh CVTS | Cardiac Surgeon, Tulip Mediworld Superspeciality Hospital, Guwahati
Quick Takeaways
- CT Coronary Angiogram (CCTA) is a non-invasive heart scan — no catheter, no hospital admission, no sedation, no surgical cut
- It can detect coronary artery disease years before a heart attack occurs
- Tulip Mediworld, Guwahati is the first and only hospital in Northeast India to offer this scan
- The procedure takes 15–20 minutes; you go home the same day
- Recommended for anyone 35+ with risk factors: diabetes, hypertension, smoking, high cholesterol, or family history of heart disease
Let me ask you a question that I ask every patient who comes to me after a heart attack: “Did you have any warning signs in the months before?”
Most of them say yes. Chest discomfort they attributed to acidity. Breathlessness they thought was from being unfit. Fatigue they assumed was stress or age. Warning signs that were there — but that no test had caught in time.
This is the central challenge of coronary artery disease: it builds silently. Plaques accumulate inside the coronary arteries over years, sometimes decades, without producing symptoms severe enough to send someone to a doctor. By the time the blockage is critical, the window for easy prevention has often passed.
Until recently, detecting this disease before it became dangerous required an invasive procedure — the traditional coronary angiogram, which involves a catheter inserted through the wrist or groin and threaded to the heart. It is an excellent diagnostic tool. But it carries procedural risk, requires hospital admission, and is not something you would do as a routine screening measure.
That has changed. And at Tulip Mediworld Superspeciality Hospital, we have brought that change to Northeast India.
Tulip Mediworld is the first hospital in Northeast India to offer CT Coronary Angiography (CCTA) — a completely non-invasive heart scan that can visualise your coronary arteries in detail, detect plaque buildup and blockages, and give you and your doctor a precise picture of your cardiac health. As an outpatient procedure. In under 20 minutes. Without a single cut.
This article explains exactly what the scan is, who needs it, what happens during it at our hospital, and what to do with the results.
A CT Coronary Angiogram — also called a Coronary CT Angiography or CCTA — is a non-invasive imaging test that uses a specialised CT (computed tomography) scanner to create detailed, three-dimensional pictures of your coronary arteries.
The coronary arteries are the blood vessels that supply oxygen-rich blood to the heart muscle itself. When these arteries narrow due to plaque buildup — a process called coronary artery disease (CAD) — the heart muscle doesn’t get enough blood, which can lead to chest pain (angina), heart attack, and in severe cases, sudden cardiac death.
The CT scan captures hundreds of cross-sectional images of your heart in a matter of seconds. A contrast dye — injected through a small IV in your arm — highlights the inside of your coronary arteries on the scan. This allows our radiologists and cardiac team to see exactly where plaque has formed, whether any artery is narrowed, and how significant any blockage is.
A standard CT scan of the chest gives a broad picture of the structures inside your chest — lungs, heart as a whole, major blood vessels. It is useful but does not show the fine detail inside the coronary arteries.
An ECG (electrocardiogram) records your heart’s electrical activity and can detect rhythm problems, evidence of a previous heart attack, or electrical signs of strain. But it cannot see blockages forming inside an artery.
The CT Coronary Angiogram is specifically designed to do what neither of these tests can: look inside the coronary arteries and show, with high precision, whether blockages are present and how significant they are. As Mayo Clinic describes it, it is one of the most powerful non-invasive tools currently available for evaluating coronary artery disease.
This is the question most patients ask — and it is the right question.
The traditional coronary angiogram (sometimes called cardiac catheterisation or invasive angiography) has been the gold standard for diagnosing coronary artery disease for decades. A thin tube called a catheter is inserted through the wrist or groin artery and carefully threaded up to the heart. Contrast dye is injected directly into the coronary arteries, and real-time X-ray images show any blockages. If a blockage is found, the cardiologist can sometimes treat it in the same session with a stent.
It is an excellent procedure — but it is invasive, carries procedural risk, requires hospital admission, and typically involves sedation and a recovery period.
The CT Coronary Angiogram produces comparable diagnostic images through a completely different approach: no catheter, no sedation, no hospital admission.
| Feature | CT Coronary Angiogram (CCTA) | Traditional Invasive Angiogram |
|---|---|---|
| Invasiveness | Completely non-invasive | Catheter inserted through wrist or groin |
| Hospital admission | Not required — OPD procedure | Usually required |
| Sedation or anaesthesia | Not required | Usually mild sedation |
| Procedure time | 15–20 minutes | 1–3 hours (including preparation) |
| Recovery time | None — go home immediately | Several hours to a day |
| Radiation | Low-dose CT radiation | X-ray radiation (fluoroscopy) |
| Can treat blockages at same time? | No — diagnostic only | Yes — stenting can be done immediately |
| Best suited for | Screening, diagnosis, ruling out CAD | Confirmed significant disease requiring intervention |
As noted by Circle Cardiovascular Imaging, cardiac CT scans are far less invasive and carry a lower risk of procedural complications than traditional angiography — making them ideal for patients who need a clear answer about their coronary health without the risks of catheterisation.
The important nuance: If the CCTA reveals a significant blockage that requires treatment — a stent or bypass surgery — you will then be referred for an invasive angiogram and the appropriate intervention. The CCTA does not replace the invasive angiogram in all situations; it eliminates the need for it in many situations, and it identifies who actually needs to go further.
The CCTA is not a test for everyone — it is specifically valuable for people at intermediate risk of coronary artery disease, or for those whose symptoms or risk profile makes it important to know whether CAD is present.
Consider a CT Coronary Angiogram if you are 35 or older and have one or more of the following:
This is not an exhaustive list. Your GP or physician is the best person to assess whether this scan is appropriate for your specific situation. But if you have risk factors and have never had your coronary arteries properly evaluated, this scan offers a safe, fast, and highly informative starting point.
The scan is not recommended for: people who are pregnant, those with known severe kidney disease (contrast dye is used), or those with very irregular heart rhythms that make image quality difficult to achieve.
Many patients are relieved to discover how simple the experience is. Here is exactly what to expect on the day of your CT Coronary Angiogram at Tulip Mediworld.
Before the scan (preparation). You will be asked to fast for 4–6 hours before the procedure — no food, though water is usually fine. Avoid caffeine for 24 hours beforehand, as caffeine can increase heart rate and affect image quality. Wear comfortable, loose clothing. You do not need to arrange for anyone to drive you home, as no sedation is used — though many patients bring a family member for company.
Arrival and registration. The CT Coronary Angiogram is a fully outpatient (OPD) procedure at Tulip Mediworld — you will not be admitted to the hospital as an inpatient. After registering at our OPD, you will be guided to the radiology department.
Pre-scan preparation. Our team will place a small IV cannula in your arm — this is for the contrast dye injection, and it is similar to a standard blood draw. Electrode stickers will be placed on your chest to monitor your heart rhythm throughout the scan (the scanner synchronises its image capture with your heartbeat for maximum sharpness). If your heart rate is above 65 beats per minute, a small dose of a beta-blocker medication may be given to slow it slightly — this is standard practice and entirely safe.
The scan itself. You will lie on the scanner table, which slides into a large, doughnut-shaped CT machine. You are not enclosed — your head remains outside the machine for the duration. At the moment of image capture, the team will ask you to hold your breath for approximately 10 seconds while the scanner rotates. The contrast dye is injected through your IV, and you may feel a brief warm sensation through your body — this is completely normal and passes within seconds. The scan captures hundreds of images of your heart and coronary arteries in this single breath-hold. The entire imaging process takes under 5 minutes.
After the scan. There is no recovery period. Once the IV is removed, you are free to leave. The contrast dye is cleared by your kidneys over the next few hours — drinking water helps. You can eat, drive, and resume normal activities immediately.
Results. The scan images are analysed by our radiology team. Depending on the findings, results are typically available within the same day or the next working day, and your case will be reviewed by Dr. Sarma’s cardiac team. If the scan reveals no significant disease, you will be given guidance on monitoring and lifestyle. If a blockage or significant plaque is found, the team will discuss next steps with you directly.
The CCTA report typically includes several components:
Coronary artery plaque burden. The scan identifies whether plaques are present in your coronary arteries, and characterises them — hard (calcified) plaques versus soft (non-calcified) plaques. Non-calcified plaque is considered higher risk for rupture and is an important finding even when the artery is not yet significantly narrowed.
Degree of stenosis (narrowing). The report will indicate whether any artery is narrowed, and by approximately how much. A blockage of less than 50% is typically managed with medication and lifestyle changes. A blockage of 70% or more in a major artery usually requires intervention — either a stent or, in some cases, bypass surgery.
Coronary artery calcium score (CAC score). The scan also quantifies calcium deposits in the artery walls — an established marker of long-term cardiovascular risk. A calcium score of zero is a very reassuring finding. A high score indicates significant atherosclerosis and warrants more aggressive risk factor management, as outlined in PMC research on calcium scoring and cardiac CT.
What happens if a significant blockage is found? The cardiac team at Tulip Mediworld will discuss your options with you. This may involve:
The CCTA does not create anxiety — it creates a clear picture that allows informed decisions. Most people who have the scan either find reassurance (no significant disease) or find an actionable answer (a blockage that can now be treated before it causes a crisis).
Until Tulip Mediworld introduced CT Coronary Angiography, patients in Northeast India who needed this scan had two options: go to Delhi, Kolkata, or Chennai — or go without it.
Going without it meant that for millions of people across Assam, Manipur, Meghalaya, Nagaland, Arunachal Pradesh, and Tripura, one of the most powerful tools in modern preventive cardiology was simply inaccessible.
That changed when Dr. Apurba Kumar Sarma founded Tulip Mediworld and brought this technology to Guwahati.
This was not an incidental decision. It reflects the same conviction that has guided Dr. Sarma’s entire career: that the people of Northeast India deserve the same access to world-class cardiac care as patients in any metropolitan city. The CT Coronary Angiogram is not a luxury investigation — it is a diagnostic tool that, in the right patient, can detect life-threatening disease before a heart attack occurs and before surgery becomes necessary. Making it available here, as a simple outpatient procedure, is part of Tulip’s commitment to preventive cardiac care for the region.
For patients from Guwahati, the benefit is obvious. But for patients from Shillong, Imphal, Agartala, Dimapur, or Itanagar — who previously faced a multi-day journey for a 20-minute scan — the significance is even greater. Guwahati is now a destination for cardiac care in Northeast India, not a transit point to somewhere else.
At Tulip Mediworld Superspeciality Hospital, the CT Coronary Angiogram is available as a fully OPD procedure. No admission. No overnight stay. Appointment through our OPD or by calling our team directly.
Is the procedure painful? No. The CT Coronary Angiogram is entirely pain-free. The only minor discomfort some patients notice is the IV cannula insertion — similar to a routine blood test — and the brief warm sensation when the contrast dye is injected. There is no catheter, no incision, and no sedation.
Is the radiation safe? Modern CT scanners use significantly lower radiation doses than older machines, and the dose used in a coronary CT angiogram is carefully calibrated to the minimum required for diagnostic quality images. For context, the radiation exposure from a CCTA is broadly comparable to the natural background radiation you receive over the course of several months. For patients in whom the scan is clinically indicated, the diagnostic benefit far outweighs this minimal risk. Our radiology team applies dose-reduction protocols for every scan.
Do I need a doctor’s referral to get this scan? A referral from your cardiologist, physician, or GP is recommended and ensures that the scan is being done for a clinically appropriate reason. However, you are also welcome to contact our team directly — we can facilitate a preliminary consultation with Dr. Sarma’s team to determine whether the CCTA is the right investigation for you. Call +91 99540 15111 to speak with our team.
What if a blockage is found — does that mean I need surgery immediately? Not necessarily. The treatment for a detected blockage depends entirely on its severity, location, and your overall health. Many patients with early or moderate blockages are managed very successfully with medications and lifestyle changes alone. Others may need a stent — a minimally invasive procedure performed by our interventional cardiology team. Bypass surgery is reserved for more complex cases involving multiple severe blockages or specific anatomical patterns. Whatever the finding, the decision is made carefully, in discussion with you, with no pressure and no rush.
This article is for informational purposes only and does not constitute medical advice. Please consult a qualified cardiac surgeon for evaluation and treatment specific to your condition.
You cannot feel a plaque building inside your coronary artery. You cannot ECG your way to a definitive answer about your blockage risk. But you can get a clear picture — in 20 minutes, without being admitted to hospital, without a catheter — right here in Guwahati.
If you are 35 or older with any cardiovascular risk factors, or if you have unexplained chest discomfort that has not been fully investigated, the CT Coronary Angiogram at Tulip Mediworld is worth a conversation.
To book your CT Coronary Angiogram or speak with Dr. Apurba Kumar Sarma’s team, call us at +91 99540 15111. Tulip Mediworld Superspeciality Hospital, GS Road, Rukmini Gaon, Guwahati — Assam’s first destination for non-invasive cardiac imaging.
About the Author
Dr. Apurba Kumar Sarma, MBBS, MS (General Surgery), MCh (CVTS) is a cardiovascular and thoracic surgeon with over 25 years of experience and 7,000+ successful heart surgeries. He is the Founder, Chairman and Managing Director of Tulip Mediworld Superspeciality Hospital, GS Road, Rukmini Gaon, Guwahati, Assam — 781022. He is a Fellow of the Indian Association of Cardiovascular-Thoracic Surgeons and a Life Member of the Indian Medical Association.
This article is for informational purposes only and does not constitute medical advice. Please consult a qualified cardiac surgeon for evaluation and treatment specific to your condition.
