A heart transplant is an operation to replace a damaged or failing heart with a healthy heart from a donor who's recently died.
It may be recommended when a person's life is at risk because their heart no longer works effectively.
A heart transplant may be considered if you have severe heart failure and medical treatments are not helping.
Conditions that may eventually require a heart transplant include:
If your doctor thinks you might benefit from a heart transplant, you'll need to have an in-depth assessment to check whether you're healthy enough to have one before being placed on a waiting list.
A heart transplant needs to be carried out as soon as possible after a donor heart becomes available.
The procedure is performed under general anaesthetic, where you're asleep.
While it's carried out, a heart-lung bypass machine will be used to keep your blood circulating with oxygen-rich blood.
A cut is made in the middle of the chest. Your own heart is then removed, and the donor heart is connected to the main arteries and veins. The new heart should then begin beating normally.
You'll usually need to stay in hospital for around 2 or 3 weeks after a heart transplant.
Most people are able to start returning to many of their normal activities within a few months.
Your transplant team can give you advice about how long you may need to avoid certain activities during your recovery.
You'll need to have regular check-ups with your transplant team after the transplant.
You'll also need to take medicines called immunosuppressants for the rest of your life.
Without these medicines, your body may recognise your new heart as foreign and attack it (rejection).
A heart transplant is a complex and risky procedure.
Possible complications include:
Many of these problems are treatable, although sometimes another heart transplant may need to be carried out if possible.
Most people can eventually return to their normal activities after a heart transplant and experience a significant improvement in their symptoms for many years.
But it's a major operation and some of the complications can be life threatening.
Some people have survived for more than 25 years after a heart transplant.
If you're interested in donating your organs after you die, you can join the NHS Organ Donor Register.
Joining the NHS Organ Donor Register is quick and simple, and will only take a few minutes of your time.
You can remove yourself from the register at any time and can specify what you're willing to donate.