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(Note: In medical terms, "lub" corresponds to S1 and "dub" corresponds to S2. The sequence represents one full cardiac cycle.)
One day, a mischievous imp named "Atheros" began to cause trouble in the kingdom. Atheros started to build up sticky plaque in the blood vessels, narrowing the pathways and restricting blood flow. The kingdom's inhabitants began to feel sluggish, and their hearts grew tired. s1 s2 lub dub
The first heart sound, S1, marks the , the phase where the heart's lower chambers (ventricles) contract to pump blood out to the body and lungs. Heart Sounds and Murmurs - UTMB (Note: In medical terms, "lub" corresponds to S1
Palpate the carotid pulse while listening. S1 occurs just before the pulse; S2 occurs just after. (Note: In medical terms