Heart Sound S1 [top]

The , commonly known as the "lub" in the "lub-dub" sequence, is a foundational acoustic event marking the beginning of ventricular systole. This high-pitched sound originates from the sudden closure of the atrioventricular valves—the mitral (M1) and tricuspid (T1) valves—as pressure in the ventricles exceeds that of the atria. Physiology and Genesis of S1

The human heart is a remarkable organ that beats around 100,000 times per day, pumping blood throughout the body. One of the key indicators of a healthy heart is the presence of normal heart sounds. In this post, we'll explore the first heart sound, also known as S1. heart sound s1

A healthcare professional can assess S1 by: The , commonly known as the "lub" in