Lub Dub Sounds Systole Diastole Jun 2026

In the language of the chest wall, there are only two syllables.

The sounds associated with the heartbeat are clinically known as and S2 . These are not the sounds of the muscle contracting, but rather the sound of heart valves snapping shut to prevent the backflow of blood. lub dub sounds systole diastole

The first heart sound, "lub," marks the start of . During this phase, the heart's lower chambers (ventricles) contract to pump blood out to the lungs and the rest of the body. How the Heart Works - How the Heart Beats | NHLBI, NIH In the language of the chest wall, there

Systole is the phase of the heartbeat where the cardiac muscle contracts and pumps blood from the chambers into the arteries. The first heart sound, "lub," marks the start of

To understand the sounds, one must first understand the two primary phases of the cardiac cycle: and diastole .