Lub-dub Sounds - [repack]

| Sound | Common Name | Origin | What is happening? | | :--- | :--- | :--- | :--- | | | "Lub" | Closing of the Mitral and Tricuspid valves. | The ventricles contract to pump blood out, and the inlet valves snap shut to prevent blood from flowing backward into the atria. | | S2 | "Dub" | Closing of the Aortic and Pulmonic valves. | The ventricles relax, and the outlet valves snap shut to prevent blood from flowing backward from the arteries into the heart. |

It is the sound of:

If a valve is stiff and narrow (stenotic), the heart must push blood through a smaller opening. lub-dub sounds

Sometimes, an extra sound appears, creating a rhythm that sounds like a galloping horse. This can indicate heart failure or high blood pressure.

If a doctor hears all four, it sounds like a horse galloping: "Lub-dub-ee-dub." | Sound | Common Name | Origin | What is happening

The "lub-dub" sounds are essential for assessing cardiac function and diagnosing various cardiovascular conditions. Some key aspects of clinical significance include:

The "lub-dub" is more than just a sound; it’s a mechanical symphony. The "lub" is the sound of , and the "dub" is the sound of recovery . As long as those two notes stay in sync, your body’s most vital engine is doing its job. | | S2 | "Dub" | Closing of the Aortic and Pulmonic valves

"The squeeze is over. We are locking the exit doors to keep blood moving forward."