Lub Dub Sound Jun 2026

The first heart sound, referred to as or the "lub," signifies the beginning of ventricular systole (the phase when the heart's lower chambers contract). It is primarily caused by the simultaneous closure of two atrioventricular (AV) valves: Mitral Valve: Located on the left side of the heart. Tricidpid Valve: Located on the right side of the heart.

The lub dub sound is a classic representation of a heartbeat sound. Here's a simple feature implementation in Python: lub dub sound

This sound marks the beginning of diastole, the phase where the heart relaxes and fills with blood again. The first heart sound, referred to as or

The pause follows the "lub," and then comes the sharper, higher-pitched "dub." This is , or the Second Heart Sound. The first heart sound