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Variable first (1st) heart sound

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If the blood flow from atria to ventricles varies from one beat to the next, then the intensity of the first heart sound will change accordingly.

Causes include:

  • varying duration of diastole
  • complete atrioventricular block

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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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