At a glance
Coronary artery bypass grafting (CABG) is open-heart surgery that reroutes blood around blocked or narrowed coronary arteries (the vessels that supply the heart muscle with blood) by attaching a healthy blood vessel taken from elsewhere in the body as a detour.
The surgeon harvests a graft vessel, usually from the chest wall, leg, or forearm, and sews one end above the blockage and the other end below it. Blood can then flow freely past the narrowed section. Most patients are connected to a heart-lung bypass machine during the procedure, which keeps blood circulating and the lungs working while the surgeon operates on a still heart. Some surgeons perform a beating-heart technique without the machine, depending on the patient's anatomy and the surgical team's experience.
Medical Condition
CABG is recommended when one or more coronary arteries are too severely blocked to be treated safely or durably by a stent (a small mesh tube placed inside the artery to hold it open). A cardiologist and a cardiac surgeon typically review the coronary angiogram (an X-ray map of the heart's blood vessels) together before deciding that surgery is the right path.
- Significant narrowing in three or more coronary arteries (triple-vessel disease)
- Blockage in the left main coronary artery, which supplies a large portion of the heart muscle
- Reduced pumping function of the heart combined with multi-vessel disease
- Coronary artery disease in patients who also have diabetes, where bypass tends to produce more durable results than stenting
- Failed or unsuitable stenting, where a previous stent has become blocked again (in-stent restenosis) or the anatomy makes stenting technically difficult
- Acute heart attack with a blocked artery that cannot be opened quickly by other means
CABG is generally not suitable in certain situations, and the surgical team will weigh each case individually.
- Arteries that are too small or diseased throughout their full length to accept a graft
- Severely weakened heart muscle where the risk of surgery is judged too high and other options such as a ventricular assist device (a mechanical pump) are preferred
- Multiple serious conditions in other organs, such as advanced kidney failure or severe lung disease, that make a major operation unsafe
- Patient preference for a non-surgical approach after being fully informed of the trade-offs
Risks & Complications
CABG is major surgery and carries real risks; the likelihood and severity of any complication depend heavily on the patient's age, heart function, and other health conditions.
- Temporary confusion or memory difficulty after surgery, sometimes called 'pump head', linked to the heart-lung bypass machine; usually resolves within weeks
- Atrial fibrillation (an irregular heartbeat originating in the upper chambers of the heart), which commonly appears in the first few days and is usually treated with medication
- Wound infection at the chest incision or at the site where the graft vessel was taken
- Bleeding that requires a return to the operating theatre
- Kidney injury, especially in patients with pre-existing kidney disease
- Stroke (brain damage caused by interrupted blood flow), a serious but uncommon complication
- Heart attack during or shortly after the operation
- Sternal (breastbone) instability or poor healing, particularly in patients with diabetes or obesity
- Lung complications such as pneumonia or fluid around the lungs (pleural effusion)
- Graft failure over time, meaning the bypass vessel itself eventually narrows or blocks
Preparation & Procedure
Preparation for CABG usually begins days before admission and involves adjustments to medications, diet, and habits. The surgical team gives specific instructions, but the following describes what most hospitals require.
Blood thinners such as aspirin or anticoagulants are often paused several days before surgery to reduce bleeding risk, but the cardiologist decides which ones to stop and which to continue. Smoking significantly slows healing and increases lung complications, so the team will advise stopping as early as possible before surgery. Alcohol is typically avoided in the days leading up to the procedure.
Patients usually stop eating solid food six hours before the operation and stop drinking clear fluids two to four hours before. Diabetes medications and insulin require special adjustment on the morning of surgery, and the team provides a specific plan for each patient.
Before surgery, the hospital typically runs the following assessments to confirm fitness for the procedure and plan the operation.
- Coronary angiogram, if not already done recently, to map the blocked arteries
- Echocardiogram (an ultrasound of the heart) to measure heart function and valve condition
- Chest X-ray to assess the lungs and heart size
- ECG (electrocardiogram) to record the heart's electrical activity
- Blood tests including a full blood count, kidney and liver function, clotting ability, and blood group
- Lung function tests in patients with breathing problems
- Carotid ultrasound (an ultrasound of the neck arteries) in some patients to check for stroke risk
On the day of surgery, the procedure generally follows these steps, though the exact sequence and duration vary between hospitals and surgeons.
- The patient changes into a hospital gown and a nurse inserts an intravenous (IV) line into the arm
- The anaesthesia team gives general anaesthesia, so the patient is fully asleep throughout
- Monitoring lines are placed, including an arterial line in the wrist to track blood pressure beat by beat and a central line in the neck or chest for medication delivery
- The surgical team prepares the skin of the chest and the site where the graft vessel will be harvested
- The surgeon opens the chest by cutting through the breastbone (sternum) and spreads the ribcage gently to reach the heart
- In most cases, the patient is connected to the heart-lung bypass machine, the heart is stopped briefly, and the surgeon sews the graft vessels into position above and below each blockage
- The heart is restarted, the bypass machine is disconnected, and the surgeon checks blood flow through each new graft
- The breastbone is closed with wire, the chest is sutured in layers, and drainage tubes are left temporarily to remove any fluid or blood from around the heart and lungs
- The patient is transferred to the cardiac intensive care unit (ICU) while still under anaesthesia, where the breathing tube is removed once they wake and breathe adequately on their own
Aftercare
Recovery from CABG happens in stages over several weeks, and where a patient is monitored and how quickly restrictions are lifted depends on how the operation went and how they respond in the early hours afterward.
- Cardiac ICU stay: most patients spend one to three days in the ICU, where heart rhythm, blood pressure, and breathing are watched continuously
- Ward stay: once stable, patients move to a general cardiac ward for several more days before discharge; total hospital stay is commonly one to two weeks
- Driving: most surgeons advise waiting at least four to six weeks before driving, partly because the breastbone needs time to heal and an airbag or sudden stop could injure it
- Lifting and strenuous activity: carrying anything heavy or doing vigorous exercise is typically avoided for six to eight weeks while the breastbone fuses
- Sternal wound care: the chest incision and any leg or arm wound where the graft was taken must be kept clean and dry; the team gives specific instructions on showering and dressing changes
- Cardiac rehabilitation: a supervised exercise and education programme, usually starting four to six weeks after surgery, has been shown to improve recovery and reduce future cardiac events
- Medications: patients are normally sent home with several medicines, which may include blood thinners, cholesterol-lowering drugs (statins), and blood pressure medication; the cardiologist reviews and adjusts these at follow-up
- Follow-up appointments: most centres schedule a wound check around two weeks after discharge, a cardiology review at four to six weeks, and further checks at intervals decided by the treating team
- Lifestyle: a heart-healthy diet, quitting smoking permanently, regular walking that gradually increases, and managing blood sugar and blood pressure are all part of protecting the bypass grafts long term
- Return to work: desk workers may return in four to six weeks; physically demanding jobs take longer and the surgeon advises individually
Cost & What Determines It
CABG is one of the more resource-intensive cardiac operations, and the total price can differ enormously between one hospital and another or one country and another, even for two patients with apparently similar heart disease, because so many variables feed into the final bill.
- Complexity of the disease: the number of arteries bypassed (single, double, triple, or quadruple bypass), the condition of the heart muscle beforehand, and whether additional procedures such as valve repair are done at the same time all affect operative time and resources
- Technique used: beating-heart (off-pump) surgery and minimally invasive approaches may carry different pricing from conventional on-pump surgery at some centres
- Hospital class and country: a private tertiary hospital in a major city charges differently from a public or accredited regional centre, and prices vary significantly across countries in Asia, Europe, and elsewhere
- Length of stay: time in the ICU and the ward is usually billed per day; a smooth recovery shortens the stay while complications can extend it
- Graft vessels and materials: the type of graft (internal chest artery versus leg vein) affects theatre time; any specialised surgical equipment adds to costs
- Perfusionist and heart-lung bypass machine use: operating the bypass machine requires a specialist and adds to procedure costs
- Anaesthesia: cardiac anaesthesia for a procedure of this length is a significant cost component
- Post-operative medications: blood thinners, heart medications, and antibiotics given during the hospital stay are typically itemised separately
- Rehabilitation: a cardiac rehab programme after discharge may or may not be bundled into the hospital package
- Additional investigations: pre-operative angiogram, echocardiogram, or other tests may be billed outside the surgical package if they were not already done
Many hospitals offer a surgical package that bundles the surgeon's fee, anaesthesia, operating theatre, ICU stay, and a set number of ward days into one quoted price. Items that tend to be billed separately include extra days in the ICU or ward if recovery takes longer than expected, blood transfusions, any unplanned procedures, take-home medications, outpatient follow-up visits, and cardiac rehabilitation sessions.
BPJS Kesehatan does not cover treatment received abroad, and most Indonesian private health insurance policies exclude overseas care unless the policy specifically includes international coverage. Patients who travel for CABG therefore typically pay out of pocket or through a private international health insurance plan. Requesting a detailed written cost estimate, broken down by each component, from the treating hospital before travelling is the most practical way to understand the full financial commitment and avoid unexpected charges on arrival.
Frequently Asked Questions
How long does CABG surgery take?
CABG usually takes between three and six hours, depending on how many arteries need to be bypassed. The surgical team also needs time to connect you to the heart-lung machine (a device that keeps blood circulating while the heart is temporarily stopped) and to close the chest carefully at the end. Your surgeon will give you a more specific estimate based on your individual case.
How much does CABG surgery cost?
The cost of CABG varies considerably from patient to patient, and no single figure applies to everyone. Key factors include the number of bypasses needed, the hospital class you choose, the length of your ICU and ward stay, and any additional devices or grafts (the tissue or vessel used to reroute blood flow) required. Requesting a written estimate directly from the hospital is the most reliable way to get a number that reflects your specific condition.
What is recovery like after CABG, and when can I go back to work?
Most people spend one to two weeks in hospital after CABG, including several days in the ICU, and then continue recovering at home for six to twelve weeks. Desk work or light activity may be possible after about six to eight weeks for many patients, while jobs involving heavy lifting or physical strain typically require a longer break. Your cardiologist and surgeon will set a personalised timeline based on how well your heart heals and how you feel during follow-up visits.
What warning signs should I watch for after I go home from CABG?
Contact a doctor right away if you notice increasing redness, swelling, or discharge around your chest or leg wound, a fever, chest pain, shortness of breath, or a heartbeat that feels unusually fast or irregular. These can be signs of infection, fluid around the heart (pericarditis), or other complications that need prompt attention. It is normal to feel some soreness and fatigue for several weeks, but any sudden or worsening symptom should be checked without delay.
This page is general information, not a substitute for medical advice. Every case is different. Your doctor decides what is right for you.
