Open-heart surgery is any operation in which the surgeon cuts through the breastbone to work directly on the heart. The common ones are coronary artery bypass grafting (CABG), heart valve repair or replacement, and repair of some congenital defects. It is advised when medicines and simpler catheter procedures cannot fix the problem, and most people need about 6 to 12 weeks to recover.
What counts as open-heart surgery?
Open-heart surgery is any operation where the surgeon makes a large cut in the chest and opens the breastbone to reach the heart. The NHLBI describes a 6- to 8-inch incision down the centre of the chest, the breastbone cut, and the rib cage opened. The heart itself is not always opened; "open" refers to the chest.
Cleveland Clinic lists the operations that use this approach:
- Coronary artery bypass grafting (CABG), the most common heart operation worldwide.
- Heart valve repair or replacement (aortic, mitral and other valves).
- Repair of congenital heart disease, such as an atrial septal defect or hypoplastic left heart syndrome.
- Aortic aneurysm repair.
- Heart transplant, and placement of a ventricular assist device or total artificial heart.
The NHLBI adds the Maze procedure for atrial fibrillation to this list. A pacemaker, defibrillator or ablation can be added during the same operation.
Two variants matter when you read a surgical plan. In on-pump surgery a heart-lung bypass machine takes over circulation while the heart is stopped. In off-pump (beating heart) surgery, which the NHLBI says is often used for CABG, the breastbone is still opened but the heart keeps beating and no machine is used. Keyhole or minimally invasive surgery goes between the ribs without cutting the breastbone; the NHS says this is sometimes possible for bypass and valve operations, with quicker recovery, but it is not suitable for everyone.
When do doctors advise open-heart surgery?
Doctors advise open-heart surgery when medicines and catheter procedures cannot control the problem, or when the anatomy makes surgery the safer long-term choice. The NHS says a bypass is considered when medicines are not enough for angina, when the risk of a heart attack is high, or when coronary angioplasty and stenting is not suitable; it can be planned or done as an emergency.
Cleveland Clinic says CABG is often the best option for multiple blocked arteries or blockages in certain locations, and it generally carries a lower risk of needing follow-up procedures than angioplasty. Trials showed it relieves angina in 8 out of 10 people. The NHS stresses that a bypass eases symptoms and lowers heart attack risk but does not cure coronary heart disease.
For valves, the NHS says replacement is recommended for severe valve disease that cannot be repaired, and sometimes for severe disease without symptoms, to prevent progression to heart failure. Mild disease without symptoms may need no treatment, and mild or moderate disease is usually managed with medicines. An echocardiogram grades the valve; see echo test cost for Indian prices.
For congenital defects, Cleveland Clinic lists repair of an atrial septal defect (a hole between the upper chambers) and of hypoplastic left heart syndrome among open-heart operations. Which defects need open surgery, and at what age, is a decision for a paediatric cardiac team.
What happens before, during and after the operation?
Before the operation you have tests, stop certain medicines, and fast. Cleveland Clinic says blood thinners such as aspirin or warfarin and anti-inflammatory painkillers may be stopped a week or two before, and that patients should stop smoking and avoid sick contacts for two weeks. Tests include a chest X-ray, ECG and, for bypass, an angiogram, which the NHS says is used to check the heart vessels and decide the best treatment.
During the operation you are under general anaesthetic. The NHS describes the bypass: a long cut down the centre of the chest, through the breastbone; the heart usually connected to a machine that keeps blood flowing; one or more healthy vessels removed from the leg or chest and grafted around the blockages; the breastbone closed with metal wires that are usually left in permanently. The NHS says the operation usually takes 3 to 6 hours; Cleveland Clinic says some open-heart operations take six hours or longer.
After the operation Cleveland Clinic says you spend a day or longer in intensive care, then several days on a ward doing walking exercises and follow-up tests; the average bypass stay is 5 to 7 days. Common early effects are constipation, poor sleep, loss of appetite, mood swings, memory problems and chest-wall pain. Full recovery takes 6 to 12 weeks, some patients take a blood thinner for a few months, and cardiac rehabilitation is recommended.
How risky is open-heart surgery?
Open-heart surgery carries real risks, but for most planned operations the risk of death is low. The NHLBI lists arrhythmias, bleeding, blood clots that can cause stroke, damage to the heart, kidneys, liver or lungs, infection, pneumonia, memory and concentration problems that often improve within a year, and death, which is more likely in people who are very sick before surgery. The NHS adds that kidney problems usually settle within days but can need dialysis, and that a heart attack or stroke can happen during or soon after the operation.
Risk rises with emergency surgery, diabetes, kidney disease, lung disease, peripheral artery disease and smoking, according to both the NHLBI and Cleveland Clinic.
Indian figures come from published hospital series, not a national registry:
| Series (source) | Patients | Operative mortality | Later survival |
|---|---|---|---|
| Isolated off-pump CABG, South India 2014-2019 (Indian J Thorac Cardiovasc Surg, 2023) | 1,789 | 2.3% | 88.7% at 6 years |
| CABG with ejection fraction 35% or less, Kerala 2009-2017 (JAHA, 2019) | 162 | 11.62% | 79.9% at 5 years |
The gap between the two rows is the point: a weak heart muscle raises the risk several-fold. The 2023 paper also notes that off-pump surgery is the default way of doing bypass in India, and that pre-existing kidney dysfunction, re-exploration for bleeding, stroke and prolonged ventilation were linked to operative death. Ask your surgeon for the hospital's own numbers for your type of operation.
What are the alternatives: PCI, TAVI and medicines?
The main alternatives are catheter procedures: angioplasty with a stent (PCI) for blocked coronary arteries, and transcatheter aortic valve implantation (TAVI) for a narrowed aortic valve. Neither opens the chest.
The NHS says PCI is the simpler option and bypass is chosen when PCI is not suitable. Cleveland Clinic says bypass is usually preferred when several arteries are blocked, and that it carries a lower risk of repeat procedures than angioplasty. The right choice depends on the angiogram, diabetes, heart pump function and your other illnesses; a cardiologist and a cardiac surgeon should decide it together with you.
For the aortic valve, the NHS describes TAVI: you are awake with sedation and local anaesthetic, a catheter carries a new valve through a blood vessel and places it inside the old one, the heart is not stopped and the old valve is not removed, and it usually takes 1 to 2 hours. The NHS says it is typically considered when open surgery is unsuitable or too risky.
A 2019 Cochrane review of 4 trials and 2,818 low-surgical-risk patients found TAVI and open valve surgery probably differ little in short-term death (8 versus 11 per 1,000) and stroke (16 versus 21 per 1,000). TAVI caused less atrial fibrillation, kidney injury and bleeding, but raised the need for a permanent pacemaker from 47 to 170 per 1,000. Long-term durability data were still lacking. The NHS says mild or moderate valve disease is usually managed with medicines, but no medicine repairs a damaged valve.
Mechanical or tissue valve: what is the trade-off?
A mechanical valve lasts longer but needs lifelong blood thinners; a tissue valve avoids that but wears out. The NHS says mechanical valves, made of carbon and metal, are usually recommended for younger people, last a long time, but raise the risk of blood clots, so warfarin is needed for the rest of your life. Tissue valves from human or animal sources usually last 15 to 20 years and are recommended for older people and for anyone who cannot or does not want to take anticoagulants.
A valve that stops working well can need a second replacement later. Warfarin means regular blood tests, an alert card before any dental or medical procedure, and more bleeding from cuts.
Valve repair is preferred over replacement when the valve is not badly damaged. For severe disease the NHS lists open surgical repair, a catheter-delivered clip for a leaking valve, and balloon valvuloplasty to widen a narrowed valve as options that are sometimes used instead of replacement.
Questions worth asking before you sign consent:
- Is my operation on-pump, off-pump or keyhole, and why?
- How many of these operations does this team do each year, and what is its mortality for my risk group?
- Would PCI or TAVI be reasonable for me, and what would I give up?
- Mechanical or tissue valve, and who will manage my warfarin?
- When does cardiac rehabilitation start, and where?
Where in India is open-heart surgery done, and what should you check?
Open-heart surgery in India is done in dedicated cardiac centres: government institutes, medical college hospitals and private cardiac hospitals with a cardiothoracic team, an intensive care unit and a blood bank on site. Use the hospital directory to find centres with cardiac surgery in your city, and the Ayushman hospital list if your family holds a PM-JAY card; ask the hospital's Ayushman desk directly whether your specific operation is on its package list, because the official package pages could not be opened for this guide and cover terms change by state.
The published Indian outcome data in this guide come from high-volume centres. The 2023 off-pump series was a university hospital doing hundreds of bypass operations a year, and both Indian papers link worse outcomes to kidney disease, a weak heart muscle and long ventilation. Volume and an experienced team matter.
For emergencies, call 112. The NHS list of signs that need an ambulance after a heart operation applies before one too: chest pain that does not go away, pain spreading to the arm, neck, jaw or back, sweating with nausea or breathlessness, or sudden difficulty speaking, moving a limb or a drooping face.
See a doctor the same day if angina is coming on at rest or with less effort than before, or if breathlessness, swelling of the legs or fainting is new.
This guide is general information from the sources listed below, not medical advice; a registered doctor makes decisions with you.
