MEC MNRH Research Assistance service

Lub Dub Dub Heart Sound Jun 2026

Medical Education Center 

Maharat Nakhon Ratchasima Hospital

โปรแกรมจัดเก็บข้อมูลทางการแพทย์ เพื่อประโยชน์ทางการวิจัย โดยบรรลุข้อตกลงระหว่าง Vanderbilt university และ ศูนย์แพทยศาสตร์ศึกษาชั้นคลินิก โรงพยาบาลมหาราชนครราชสีมา โดยการใช้งานโปรแกรมนี้ ไม่มีการเสียค่าใช้จ่ายใดๆ lub dub dub heart sound

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lub dub dub heart sound

Lub Dub Dub Heart Sound Jun 2026

The normal heartbeat sounds like “lub-dub” — that’s the mitral/tricuspid valves closing (lub) followed by the aortic/pulmonary valves closing (dub).

While a normal heartbeat is famously described as "," the addition of a third sound—resulting in a " lub-dub-dub " or " lub-dub-ta " rhythm—is known in medicine as the third heart sound (S3) . This triple rhythm is often called a ventricular gallop because its cadence resembles that of a galloping horse. The Core Sounds: S1, S2, and S3

Three Beats

In many cases, an S3 sound is perfectly healthy and is referred to as a . It is commonly heard in:

Lub. Dub. Dub. Listen close — it’s never just two.

The "lub dub dub" heart sound is a common way to describe the normal sounds of the heartbeat. These sounds are produced by the closing of the heart valves during the cardiac cycle.



The normal heartbeat sounds like “lub-dub” — that’s the mitral/tricuspid valves closing (lub) followed by the aortic/pulmonary valves closing (dub).

While a normal heartbeat is famously described as "," the addition of a third sound—resulting in a " lub-dub-dub " or " lub-dub-ta " rhythm—is known in medicine as the third heart sound (S3) . This triple rhythm is often called a ventricular gallop because its cadence resembles that of a galloping horse. The Core Sounds: S1, S2, and S3

Three Beats

In many cases, an S3 sound is perfectly healthy and is referred to as a . It is commonly heard in:

Lub. Dub. Dub. Listen close — it’s never just two.

The "lub dub dub" heart sound is a common way to describe the normal sounds of the heartbeat. These sounds are produced by the closing of the heart valves during the cardiac cycle.