Health conditions
Heart Disease & Surgery
If you have heart disease, surgery is still very possible — but your heart needs a little extra planning first. The biggest issues are timing after a recent heart attack or stent, and being careful with your blood-thinning and heart medicines.
The short version
Why heart disease matters for surgery
Surgery and anaesthesia ask a bit more of your heart. Your blood pressure and heart rate shift during the operation, fluids move around your body, and healing afterwards increases demand on the heart for a few days. A heart that is well controlled handles this comfortably — which is exactly why your team checks it carefully beforehand and fine-tunes your medicines.
The aim isn't to scare you off surgery. It's to make sure your heart is in its best possible shape on the day, so the operation is as safe as it reasonably can be.
Recent heart attack or stent: why timing matters
This is the single most important thing to mention to your surgical team. After a heart attack or after a coronary stent is placed, the heart and the stent need time to settle and heal.
- Recent heart attack: elective (planned, non-urgent) surgery is usually delayed — typically for at least a couple of months, and sometimes longer — to let the heart recover and lower the risk. Your cardiologist will advise the right gap for you.
- Recent stent: you'll have been started on two antiplatelet medicines ("dual antiplatelet therapy") — usually aspirin plus clopidogrel or ticagrelor. Planned surgery is generally postponed until you've completed the minimum course your cardiologist advises — often several months — because stopping these tablets too early can cause the stent to clot.
If your surgery is urgent or an emergency, your surgeon, anaesthetist and cardiologist will weigh the risks together — but always tell them about any stent or recent heart attack early.
Which heart medicines are continued, held, or adjusted
Most heart medicines protect you through surgery and are continued. A few are paused on the morning. Your pre-op team will give you a personalised list, but as a general guide:
- Aspirin and clopidogrel/ticagrelor (after a stent): do not stop these on your own. Aspirin is often continued right through surgery, and where the second tablet needs pausing that is decided by your cardiologist because of stent-clot risk. See aspirin before surgery and clopidogrel before surgery.
- Statins: usually continued — they help protect the heart around surgery. See statins before surgery.
- Beta-blockers: usually continued right through; stopping them abruptly is risky. More detail on the blood pressure medicines page.
- ACE inhibitors (-pril) and ARBs (-sartan), and water tablets (diuretics): these are often held on the morning of surgery to keep your blood pressure stable during anaesthesia, then restarted afterwards.
What's checked before the day
You'll have a pre-operative assessment where the team reviews your heart history and tunes everything up. Typically this includes:
- A detailed history — symptoms like chest pain or breathlessness, how far you can walk or climb stairs, and a full list of your medicines.
- An ECG (a quick, painless heart tracing).
- Sometimes an echocardiogram (an ultrasound scan of the heart's pumping) if you have heart failure, a murmur, or significant symptoms.
- Blood tests, and occasionally a cardiology review or further heart tests if anything needs optimising first.
If something can be improved — blood pressure, a medicine dose, fluid balance — this is when it's sorted, so you arrive on the day in the best shape.
On the day and your recovery
On the day: take the medicines you've been told to take with a small sip of water, and bring your full medicine list. Your anaesthetist will monitor your heart closely throughout — heart rhythm, blood pressure and oxygen are watched continuously, and many heart patients have a little extra monitoring as a sensible precaution rather than a sign of trouble.
Recovery: your heart medicines are usually restarted soon after surgery, sometimes the same day. Good pain relief, staying gently mobile, and breathing exercises all ease the load on your heart. Tell staff straight away about any chest pain, new breathlessness, palpitations, or marked leg swelling — these are checked promptly rather than left.
Frequently asked questions
I have a stent — can I stop my blood thinners before surgery?
Not on your own. After a stent, aspirin plus clopidogrel or ticagrelor keep the stent open, and stopping them too early can let it clot — which is dangerous. Aspirin is often continued right through surgery, and only your cardiologist should decide whether, and when, to pause the second tablet around your operation. Always tell your surgical team you have a stent as early as possible so they can plan timing safely with your cardiologist.
How long after a heart attack can I have planned surgery?
Elective surgery is usually delayed after a heart attack to let your heart recover — generally at least a couple of months, and sometimes longer, depending on your heart, the surgery, and your cardiologist's advice. This delay genuinely lowers your risk. Urgent or emergency operations can't always wait, so your surgeon, anaesthetist and cardiologist will weigh up the timing together for your situation.
Should I take my heart medicines on the morning of surgery?
Most are continued — statins and beta-blockers in particular, since stopping beta-blockers suddenly is risky. Take them with a small sip of water unless told otherwise. ACE inhibitors, ARBs and water tablets (diuretics) are often held that one morning to keep your blood pressure steady under anaesthesia. Your pre-op team will give you a clear personalised list of what to take and what to skip.
Will I need extra heart tests before my operation?
Often just an ECG, a quick painless heart tracing, plus a review of your history and medicines. If you have heart failure, a murmur, or significant symptoms, you may also have an echocardiogram (a heart ultrasound) and sometimes a cardiology review. These checks aren't a bad sign — they let the team optimise your heart so the surgery is as safe as possible on the day.