Medically reviewed by Jeffrey S. Lander, MD Key Takeaways S1 and S2 are the normal heart sounds you hear when the heart ...

Lubb-dupp. Lubb-dupp. Those are the words that health care professionals often use to mimic the sound of your heartbeat. That steady, regular sound is made by your heart valves opening and closing as ...

A third heart sound, or S3, is a low-frequency, extra heart sound that may be heard with a stethoscope right after the normal S1 and S2 heart sounds. S1 and S2 are the "lub-dub" sounds of a heartbeat ...

Sometimes, a murmur sounds like a humming sound, which can be faint or loud. It might be temporary or persistent. Heart murmurs may be present at birth or develop later in life during pregnancy, ...

Blood flows through the heart and generates noises known as heart sounds. These noises occur due to heart valves opening and closing as the heart pumps blood. A doctor can gain valuable information by ...

When someone opens the door and enters a hospital room, wearing a stethoscope is a telltale sign that they're a clinician. This medical device has been around for more than 200 years and remains a ...

Detecting a heart murmur on your own can be tricky. A murmur is an extra heart sound that can be heard by a stethoscope. Sometimes, a murmur sounds like a humming sound, which can be faint or loud. It ...

The S3 heart sound occurs as the mitral valve opens and allows blood to fill the left ventricle passively. The sound happens as a result of blood striking the left ventricle during early diastole. An ...