Often indicates a stiff or thickened heart wall, commonly from long-term high blood pressure. "ken-tuck-y" S3 Gallop Just after S2
| Feature | Split S1 | S4 Gallop ("Lub-lub-dub") | | :--- | :--- | :--- | | | The split happens during the S1 complex. | The extra sound happens just before S1. | | Location | Best heard at the Tricuspid area (lower left sternal border). | Best heard at the Apex (mitral area). | | Significance | Often benign; if wide, suspect electrical conduction delays (RBBB) or Ebstein's anomaly. | Pathological. Indicates a "stiff ventricle" (diastolic dysfunction). | | Palpation | Usually no specific palpable correlate. | You may feel a palpable "A-wave" in the neck veins or a pre-systolic impulse at the apex. |
Normally, the mitral and tricuspid valves close almost together. However, if they close asynchronously, you hear two distinct sounds:
Can be normal in youth or athletes, but in older adults, it often suggests or volume overload. 3. Other Abnormal Sounds Heart Murmurs | The Texas Heart Institute® lub lub dub heart sound
This is the second heart sound, marking the beginning of ventricular relaxation (diastole). It is caused by the closing of the aortic and pulmonary valves . What is the "Lub-Lub-Dub" (S3 Gallop)?
For most, the answer is the familiar, steady cadence: But sometimes — in the quiet of early morning, or after a sprint for the bus — it whispers something a little different: lub-lub-dub, lub-lub-dub.
To provide a "deep feature" analysis of the heart sound, we must first identify the physiological phenomenon described. Often indicates a stiff or thickened heart wall,
While the standard heart sound is a rhythmic (S1-S2), the presence of an extra sound creating a "lub-lub-dub" pattern typically indicates a Split S1 or a Fourth Heart Sound (S4) gallop.
Would you like a version tailored to a specific tone (e.g., children’s story, medical explanation, song lyrics)?
When an extra sound is heard, it is often called a because it resembles the sound of a galloping horse. Rhythm Type Phonetic Sound Medical Name Typical Timing Common Meaning Lub-Lub-Dub "ten-nes-see" S4 Gallop Just before S1 | | Location | Best heard at the
When a third sound is heard, specifically a , the rhythm sounds like "lub-dub-ta" or "lub-lub-dub," often compared to the cadence of the word "Kentucky" . S3 Heart Sound - MEDZCOOL S3 Heart Sound - MEDZCOOL YouTube·Medzcool
This is the first heart sound. It occurs at the start of ventricular contraction (systole) when the mitral and tricuspid valves snap shut to prevent blood from flowing backward into the atria.
To understand the extra sound, it is first essential to understand the two standard sounds: