human
My doctor told me I have a heart murmur. What is a heart murmur and what are the symptoms?
assistant
A heart murmur is an abnormal sound that can be heard with a stethoscope when there is turbulent blood flow through the heart. The most common type of heart murmur is called a systolic murmur, which occurs during the contraction of the heart muscle. Systolic murmurs can range from barely noticeable to loud and distinct. Other types of heart murmurs include diastolic murmurs, which occur during relaxation of the heart muscle; and pulmonic or pulmonary valve murmurs, which involve the valves between the right and left sides of the heart. Symptoms of a heart murmur may include fatigue, shortness of breath, chest pain, palpitations, dizziness, and fainting.