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Venous hum

  • Second commonest innocent murmur in childhood

  • Low-pitched continuous rumble

  • Louder in diastole, best heard at the right sternal edge.

  • SVC flow therefore disappears when the amount or velocity of flow through this vessel is reduced.

  • By

    • Lying the child down in the supine position

    • Turning the head to the left side

    • Application of light hand pressure on the right jugular

vein.

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