What Makes The Dub Sound In The Heart (Complete)

The dicrotic notch, also known as the incisura, is a small notch on the aortic pressure waveform. It occurs when the aortic valve closes, causing a brief, sharp increase in pressure. The dicrotic notch is a critical component of the dub sound, as it represents the sudden closure of the aortic valve.

The dub sound serves several important physiological purposes: what makes the dub sound in the heart

The sound we hear is not just the valves "slamming," but the vibrations of the valve leaflets, the surrounding heart structures, and the columns of blood as they are suddenly decelerated. The Two Components of "Dub" (S2) The dicrotic notch, also known as the incisura,

The sound in a heartbeat, known medically as the second heart sound (S2) , is primarily caused by the sudden closure of the semilunar valves —the aortic valve and the pulmonic valve. How the "Dub" Sound Occurs This backward rush "catches" the leaflets of the

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This pressure difference causes blood to briefly attempt to flow backward into the heart. This backward rush "catches" the leaflets of the semilunar valves, snapping them shut.