Diseased hearts can be replaced during a heart transplant, a measure taken to help save a persons life after other treatments have failed. If you have end-stage heart failure, which has severely weakened or damaged your heart, you most likely will need a heart transplant. However, because so few hearts are available, you must be sick enough to need a new heart but healthy enough to survive the surgery. In the U.S., only about 2,000 hearts are available each year, while there are 3,000 people waiting for a new heart. While you wait for a new heart, your doctor may insert a ventricular assist device (VAD) to help your heart continue to function. Once you have the transplant, you will need to take medications to suppress your immune system, so it doesnt attack your new heart. A team of doctors will monitor if your body accepts the new heart. The team will also look out for any infections that you may develop because of a suppressed immune system.