Why is Traube sign seen in Aortic Regurgitation
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Traube sign aortic regurgitation mechanism
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Traube sign is a loud, “pistol-shot” systolic and diastolic sound heard over the femoral artery in severe aortic regurgitation.
It occurs because aortic regurgitation produces:
- High systolic pressure: the left ventricle ejects a large stroke volume.
- Low diastolic pressure: blood rapidly runs back from the aorta into the left ventricle during diastole.
- Therefore, there is a markedly wide pulse pressure and rapid rise and fall of arterial pressure.
This exaggerated, brisk pulsation causes sudden expansion and recoil of the femoral artery, producing the booming “pistol-shot” sounds. It is one of the peripheral signs of significant chronic AR. Braunwald’s description calls it booming systolic and diastolic sounds over the femoral artery.
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