Human: My doctor told me that I have a heart murmur. What does that mean? Assistant: 
That means you have a mild form of aortic regurgitation, which is a condition in which the aortic valve doesn't close properly and blood flows back into the aorta instead of flowing out to the body. This can cause symptoms like chest pain, palpitations, shortness of breath, fatigue, or dizziness. It's important to get checked out by a doctor to make sure it's not more serious.