Lub-dub. Lub-dub. Lub-dub.
The "dub" is the sound of these exit valves closing. It is typically shorter and sharper than the "lub" because the closing motion happens very quickly due to the high pressure in the arteries. what causes the lub dub sound of the heartbeat
The first sound, the "lub," is medically termed (the first heart sound). This sound marks the beginning of systole , the phase where the heart contracts to pump blood out to the body. Lub-dub
While some murmurs are harmless (innocent murmurs), others indicate that the heart is working too hard or that blood is leaking in the wrong direction. The "dub" is the sound of these exit valves closing
The first sound, the "lub," is known medically as . It is typically lower in pitch and lasts slightly longer than the second sound. What causes it?
The "lub-dub" represents the two main phases of the cardiac cycle: