Four valves in your heart open and shut with each heartbeat to keep blood flowing the right way. You can be born with a valve problem or develop conditions such as:
- Atresia, the absence of a properly formed valve
- Regurgitation (leaks) in which some blood flows backward through the heart because a valve doesn’t fully close
- Stenosis (valve narrowing or stiffening) that makes it harder for your heart to pump blood