What Makes The Lub Dub Sound In The Heart Better -

Shortly after the lub , the lower chambers contract to push blood out of the heart to the lungs and the rest of the body. Once the blood is pushed out, the "exit doors" must slam shut to prevent blood from leaking back into the heart.

The "lub-dub" is a primary indicator of cardiac health. When valves do not close properly or are narrowed by disease, the sound changes. what makes the lub dub sound in the heart