ENCoronary bypass surgery creates a detour for blood around narrowed heart arteries. It is offered to people with angina or a previous heart attack whose angiogram shows several narrowed arteries and whose doctor suggests bypass rather than a stent.
In Germany, coronary bypass surgery is usually a planned operation performed by cardiac surgery departments across the country. This is heart bypass, not gastric bypass for obesity. Below: when it is needed, the grafts, the operation, recovery and arranging treatment; for an overview, see heart surgery in Germany.
What coronary artery bypass grafting is and when it is recommended
Coronary artery bypass grafting (CABG) is recommended when plaque narrows the arteries supplying the heart muscle and the heart gets too little blood; the surgeon then builds a detour. Plaque results from atherosclerosis, a build-up of fatty material in the artery wall. The graft, one of the patient’s own vessels, carries blood from the aorta or a chest artery past the narrowing.
The alternative is a stent, a mesh tube inserted through a catheter; stenting belongs to interventional cardiology. It is less invasive, but bypass means fewer repeat procedures. Doctors consider bypass more often when several arteries are narrowed, when the left main coronary artery is affected, especially alongside other arteries, or in diabetes with multi-vessel disease, in line with the current German national guideline on chronic coronary heart disease and the 2024 ESC guidelines, developed in collaboration with EACTS.
A heart team weighs the choice: a cardiologist and a cardiac surgeon review the images together, weighing age, heart and kidney function, diabetes and the patient’s wishes, as the German guideline strongly recommends for complex disease. The US National Heart, Lung, and Blood Institute describes coronary artery bypass grafting for patients. If in doubt, an independent second medical opinion in Germany can help.
Which grafts are used: arteries and veins
Grafts come from the patient’s own vessels. The internal thoracic (mammary) artery runs inside the chest wall next to the breastbone and is most often connected to the main artery on the front of the heart. Another arterial graft is the radial artery of the forearm, where the pulse is felt.
Vein grafts come from the great saphenous vein of the leg. According to studies, arterial grafts on average stay open longer than vein grafts, but the choice depends on each patient’s vessels: the leg veins and blood flow to the hands are checked beforehand, and many patients receive both kinds.
On-pump or off-pump surgery
Bypass surgery is done either on a stopped heart with a heart-lung machine or on a beating heart. In the classic approach, the surgeon divides the breastbone and medicines temporarily stop the heart; the heart-lung machine adds oxygen to the blood and pumps it around the body, bypassing the heart and lungs. Afterwards the heart restarts and the breastbone is closed with wire.
In off-pump surgery, a stabiliser steadies the part of the beating heart being grafted; this may be safer for some patients at higher risk from the machine, such as those with kidney or lung disease. For one or two arteries on the front of the heart, a minimally invasive version through a small cut between the ribs on the left side is possible. The surgeon decides from the images; no option means surgery without an incision or without risk.
Preparation, surgery and the first weeks afterwards
Preparation starts with tests: coronary angiography, an echocardiogram (heart ultrasound) and blood tests, plus a CT scan and a carotid ultrasound if needed, to refine the plan and estimate the risk. Some medicines, such as blood thinners or certain diabetes tablets, are stopped or replaced beforehand, but only on the doctor’s instructions.
The first day after surgery, sometimes longer, is spent in intensive care with round-the-clock monitoring. On the cardiac surgery ward, a physiotherapist guides breathing exercises and the first steps. The hospital decides how long the stay lasts and when the patient can fly home.
Cardiac rehabilitation follows: graded exercise under supervision, adjusted medication, control of blood pressure, cholesterol and blood sugar, and help with quitting smoking. The breastbone takes several weeks to heal, like a broken bone, so strain is limited. A bypass does not stop atherosclerosis: plaque can build up in grafts and other arteries, so medication and lifestyle still matter.
Frequently asked questions
How long does coronary bypass surgery take?
The operation itself takes about 3 to 6 hours, according to the US National Heart, Lung, and Blood Institute (NHLBI), depending on how many arteries need to be bypassed. Anaesthesia and the first hours in intensive care add to that, so relatives should expect a long wait.
What complications can occur after bypass surgery?
As with any heart operation, there are risks, which doctors discuss beforehand. An irregular heartbeat may develop and usually settles on its own. Bleeding that needs another operation, infection, heart attack, stroke, kidney problems and temporary confusion are also possible. The risk is higher in emergencies and with severe heart failure or lung or kidney disease.
Which medicines are needed after bypass surgery?
Usually a medicine against blood clots, most often acetylsalicylic acid, and a cholesterol-lowering statin, both taken long term. Germany’s national guideline on chronic coronary heart disease recommends them for all patients unless contraindicated, the statin whatever the starting cholesterol level. Never stop a medicine on your own: the doctor can change the dose or the drug.
How AlenMed arranges coronary bypass surgery in Germany
AlenMed starts with your documents: angiography disc and report, echocardiography, ECG, discharge summaries and medication list. They are translated and sent for review to cardiac surgeons at partner hospitals, for example the Department of Thoracic and Cardiovascular Surgery at the Heart and Diabetes Centre North Rhine-Westphalia in Bad Oeynhausen under Prof. Jan Gummert, or the Department of Cardiovascular Surgery at the German Heart Centre Munich under Prof. Markus Krane.
The hospital issues a cost estimate (Kostenvoranschlag) and an admission date; AlenMed arranges the visa invitation, an interpreter and rehabilitation after discharge. Indicative bypass prices are on the heart surgery page; only the estimate gives the exact amount. The AlenMed office is in Munich, partner hospitals are across Germany, and the hospital invoices directly.
This material is for reference only and is not an offer. The indication and type of surgery are decided by the cardiac surgeon in person.
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