By Dr. Apurba Kumar Sarma, MCh CVTS | Cardiac Surgeon, Tulip Mediworld Superspeciality Hospital, Guwahati
Quick Takeaways
- Bypass surgery (CABG) creates a new route for blood to flow around a blocked coronary artery – one of medicine’s most proven and successful major operations
- In experienced hands, bypass surgery success rates exceed 95–98%
- World-class bypass surgery is now available in Guwahati – patients from across Northeast India no longer need to travel to Delhi or Chennai
- Dr. Apurba Kumar Sarma has performed 7,000+ heart surgeries at Tulip Mediworld Superspeciality Hospital, Guwahati
- Most patients go home within 5–7 days and return to full normal life within 3 months
The words arrive in a hospital room, or across a cardiologist’s desk, and they land like a stone.
“You need bypass surgery.”
For most patients – and for the families sitting beside them – those four words bring a wave of fear before they bring any understanding. What is happening to my heart? What will they do to me? Am I going to be alright? Do I have to go to Delhi?
I have seen this moment more than 7,000 times in my career as a cardiac surgeon. And I want to tell you what I tell every patient who sits across from me: bypass surgery is not a sentence. It is a solution. It is, in fact, one of the most studied, most refined, and most successful major operations in the history of medicine – with outcomes that have consistently improved over 60 years of practice.
This guide will walk you through everything you need to know – what bypass surgery is, why it is done, what happens during the procedure, what recovery looks like, and what it means that you can now have this surgery done right here in Guwahati, without leaving Northeast India.
Your heart is a muscle. Like every muscle in your body, it needs a constant supply of oxygen-rich blood to keep working. That blood is delivered through a network of arteries called the coronary arteries – three major vessels that wrap around the outside of the heart and branch into smaller vessels throughout the muscle.
Coronary artery disease (CAD) happens when these arteries narrow. Over years, fat, cholesterol, and other substances build up inside the artery walls, forming deposits called plaques. As plaques grow, they restrict blood flow. When the restriction becomes severe, the heart muscle doesn’t get enough oxygen – especially during physical activity or stress. This causes the chest pain, breathlessness, and fatigue that many patients describe in the months or years before a cardiac crisis.
When a plaque ruptures, a clot can form suddenly and block the artery entirely. That is a heart attack.
Bypass surgery – medically known as Coronary Artery Bypass Grafting, or CABG (pronounced “cabbage”) – solves this problem not by clearing the blockage, but by creating a new path around it.
The surgeon takes a healthy blood vessel from another part of your body – typically an artery from inside the chest wall (the internal mammary artery) or a vein from the leg (the saphenous vein) – and uses it to build a detour. One end is attached above the blockage; the other end is attached below it. Blood can now bypass the blocked section entirely and flow freely to the heart muscle again.
The result is a heart that receives the oxygen it needs – which is why most patients feel dramatically better after bypass surgery than they did in the months preceding it.
Patients often ask: why surgery, and not a stent? It is a fair question.
A stent is a small metal mesh tube inserted through a catheter into a narrowed artery to prop it open. For many patients with single-vessel or less complex blockages, a stent is an excellent and less invasive option. But for others – particularly those with multiple blocked arteries, blockages in the left main coronary artery, or disease that involves long segments of artery – bypass surgery has been shown to produce more durable, longer-lasting results than stenting. Major international trials, including research published in the New England Journal of Medicine, consistently demonstrate that CABG offers better long-term outcomes in complex coronary artery disease.
Your cardiologist or cardiac surgeon will advise which approach is right for your specific anatomy. The key point is this: if bypass surgery has been recommended, there is almost certainly a sound clinical reason for it.
Not everyone with coronary artery disease needs bypass surgery. The decision depends on the location, number, and severity of blockages – and on your symptoms, overall health, and what a coronary angiogram shows about your arteries.
1. Triple vessel disease. When all three major coronary arteries are significantly narrowed, stenting becomes a complex and often inferior option. Bypass surgery that addresses all three vessels simultaneously typically produces better long-term results. If your cardiologist has mentioned triple vessel disease, a cardiac surgeon’s opinion is essential.
2. Left main coronary artery disease. The left main artery supplies blood to a large portion of the heart. Significant narrowing here is a high-risk finding that usually requires surgical intervention. This is sometimes called “the widow maker” disease – and bypass surgery is, for many patients, the definitive and safest treatment.
3. Failed or unsuitable angioplasty. In some patients, the anatomy of the blockages makes catheter-based treatment technically difficult or likely to fail. In others, stents have been tried but the artery has re-narrowed. In these situations, bypass surgery offers a more reliable solution.
4. Bypass surgery alongside another cardiac procedure. Patients who need heart valve surgery and also have significant coronary artery disease often have both addressed in a single operation – the valve is repaired or replaced, and bypass grafts are placed at the same time.
If you have been diagnosed with coronary artery disease and referred to a cardiac surgeon, it is because your cardiologist believes your anatomy requires surgical expertise. The next step is a direct consultation with the surgeon – where your angiogram, your symptoms, and your overall health will be reviewed together.
Understanding what happens during your surgery often reduces fear significantly. Here is what to expect, in plain language.
Before the operation begins. You will be given a general anaesthetic – you will be completely unconscious and will feel nothing throughout. An anaesthesiologist, working closely with the surgical team, will manage your breathing, your vital signs, and your depth of anaesthesia for the entire duration of the procedure.
Opening the chest. The surgeon makes an incision along the centre of the chest and carefully divides the breastbone (sternum) to access the heart. The chest is gently held open using a retractor. This is a controlled, precise process – not a dramatic action.
Harvesting the graft vessels. While the chest is being prepared, another member of the surgical team harvests the blood vessels that will be used as grafts. The most commonly used vessels are the left internal mammary artery (LIMA) – a chest wall artery that is preferred because of its excellent long-term patency – and the saphenous vein from the leg. Both can be removed without affecting circulation in the areas they came from, because your body has abundant alternative vessels in those regions.
The heart-lung machine. In most bypass operations, a heart-lung bypass machine temporarily takes over the work of your heart and lungs, so that the surgeon can operate on a still heart. This machine oxygenates your blood and circulates it through your body throughout the procedure. The heart is temporarily stopped using a medication that protects the heart muscle, and cooled to reduce its oxygen requirement. You are in no danger during this phase – the machine is managing your entire circulation.
Connecting the grafts. The surgeon now attaches the harvested vessels to create the bypasses – one end above the blockage, one end below, creating a detour around the narrowed section. Depending on how many arteries are blocked, two, three, or more grafts may be placed in a single operation. The surgeon uses fine sutures and magnification to make these connections with precision.
Restarting the heart and closing. Once the grafts are in place, the heart is rewarmed and restarted – usually returning to a normal rhythm on its own. The heart-lung machine is gradually withdrawn as the heart takes over again. The breastbone is secured with small stainless steel wires, and the skin is closed. Drainage tubes are placed to remove any fluid from around the heart in the early post-operative period.
The entire procedure typically takes 3 to 6 hours, depending on the number of grafts being placed and the complexity of the case, as noted by Mayo Clinic’s coronary bypass surgery guidelines.
The number of “bypasses” refers to how many coronary arteries are being bypassed – not the number of incisions, and not an indicator of the severity of a single blockage.
| Term | What It Means |
|---|---|
| Single bypass (CABG x 1) | One coronary artery has a blockage requiring a graft |
| Double bypass (CABG x 2) | Two arteries are bypassed |
| Triple bypass (CABG x 3) | All three major coronary arteries are bypassed |
| Quadruple bypass (CABG x 4) | Four grafts placed across vessels and their branches |
A triple bypass is not “three times as dangerous” as a single bypass. The surgical technique and the overall risk profile depend on the patient’s health, the complexity of the anatomy, and the surgeon’s experience – not simply on the number of grafts. In capable hands, triple and quadruple bypass surgery is routinely performed with excellent outcomes.
Bypass surgery has one of the strongest long-term outcome records of any major surgical procedure.
In India, across experienced cardiac surgery centres, first-time bypass success rates exceed 95–98%. These figures are comparable to outcomes reported at leading international centres – a reflection of how significantly Indian cardiac surgery has matured over the past three decades. India now performs approximately 60,000 CABG procedures per year, making it one of the largest volumes globally.
Several factors influence individual outcomes after bypass surgery:
Recovery from bypass surgery is real work – but it follows a predictable path, and the trajectory is almost always towards feeling significantly better than you did before the operation.
In hospital (Days 1–7). Most patients spend 5 to 7 days in hospital after uncomplicated bypass surgery, as outlined in Cleveland Clinic’s recovery guidelines. The first 24–48 hours are spent in the ICU or cardiac high-dependency unit, where heart rhythm, blood pressure, oxygen levels, and drainage are monitored continuously. Breathing exercises begin early – often on Day 1 – to prevent lung complications. Most patients are sitting up and beginning short walks by Day 2 or 3.
Weeks 1–2 at home. The primary experience during this period is fatigue. This is normal – your body is healing a significant surgical wound, and the sternum (breastbone) takes time to fully knit back together. You will be managing the chest wound and leg wound (if a vein graft was used). Activity is kept gentle: short indoor walks, gradually increasing each day. Heavy lifting, driving, and strenuous activity are not permitted.
Weeks 3–6. Energy steadily returns. Wound healing progresses. Most patients are able to manage daily activities – bathing, dressing, light household tasks – with increasing independence. Walking distances increase. Appetite returns. Many patients begin a formal cardiac rehabilitation programme during this period, which has been shown to significantly improve long-term outcomes. See our guide on life after heart surgery for a detailed recovery plan.
3 months onward. For most patients, the 3-month mark represents a return to normal life – with the important difference that the heart is now receiving the blood supply it was previously denied. Patients frequently report that they feel better at 3 months post-bypass than they had in the 1–2 years preceding surgery. That is the surgery working.
6 months to 1 year. Full return to all activities, including moderate physical exercise, is the norm for most patients by this point. Regular follow-up with your cardiac surgeon and cardiologist continues, including periodic investigations to monitor graft function and overall heart health.
For a long time, the honest answer to that question was: possibly. The cardiac surgery infrastructure in Northeast India was limited, and for complex cases, the best outcomes were often achieved at large centres in Delhi, Chennai, or Kolkata.
That is no longer true – and it has not been true since Dr. Sarma and his team established the cardiac surgery programme at Tulip Mediworld.
At Tulip Mediworld Superspeciality Hospital, Guwahati, you have access to:
Patients from Assam, Manipur, Nagaland, Meghalaya, Tripura, Arunachal Pradesh, and Bangladesh now travel to Guwahati – not away from it – for their cardiac surgery. The family can be nearby. The language is familiar. The distance home, when you are ready, is a short drive rather than an aeroplane journey.
About Dr. Apurba Kumar Sarma – his training, his career in Bangladesh, his founding of Tulip Mediworld, and his 25-year commitment to bringing this level of care to Northeast India.
Is bypass surgery dangerous? All major surgery carries risk – bypass surgery is not an exception. However, in experienced hands, the risk of serious complications from elective (planned) bypass surgery is significantly lower than many patients expect. The risk of not treating severe coronary artery disease – continued chest pain, progressive heart failure, and the risk of a major heart attack – is often considerably higher than the surgical risk. Your surgeon will walk you through your specific risk profile before any decision is made.
How long does a bypass graft last? This depends on the type of graft used. Internal mammary artery grafts – Dr. Sarma’s preferred choice where anatomy allows – have an excellent long-term patency record, with studies showing more than 90% of LIMA grafts still open at 10 years. Vein grafts have a somewhat shorter lifespan and may narrow over time, particularly if cardiovascular risk factors are not well controlled after surgery. Lifestyle changes, medication compliance, and regular follow-up all play a role in graft longevity.
Can I avoid bypass surgery by having a stent instead? For some patients, yes – stenting is an effective and less invasive alternative. For others – particularly those with triple vessel disease, left main disease, or anatomy that makes stenting technically unsuitable – bypass surgery produces better long-term results. This decision is made based on your coronary angiogram findings and overall cardiac status, ideally discussed at a multidisciplinary meeting of cardiologist and cardiac surgeon together.
What if I have diabetes – does that affect my surgery or recovery? Diabetes is common in patients who need bypass surgery, and it is manageable. Well-controlled blood sugar before and after surgery is associated with better wound healing and lower infection risk. Dr. Sarma’s team works with endocrinology and the ICU team to manage blood glucose carefully throughout the perioperative period. Having diabetes does not disqualify you from bypass surgery – but it does mean your preparation and aftercare need to be more carefully coordinated.
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.
If you or someone in your family has been told they need bypass surgery – or if you have been diagnosed with significant coronary artery disease and want an experienced surgical opinion – you do not need to travel to another city.
Dr. Apurba Kumar Sarma and the cardiac surgery team at Tulip Mediworld Superspeciality Hospital are here in Guwahati, with 25+ years of experience and 7,000+ surgeries behind every consultation.
Book a CABG consultation at Tulip Mediworld – call 1800 890 4655 or visit drapurbasarma.in.
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.
