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Right ventricular third heart sounds

Authoring team

A right ventricular third heart sound is maximal at the lower left sternal edge on inspiration. It is never a normal phenomenon.

Possible causes include:

  • right heart failure
  • tricuspid regurgitation
  • volume overload - right ventricular preload - from an atrial septal defect
  • constrictive pericarditis

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The content herein is provided for informational purposes and does not replace the need to apply professional clinical judgement when diagnosing or treating any medical condition. A licensed medical practitioner should be consulted for diagnosis and treatment of any and all medical conditions.

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