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Valsalva Maneuver

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Updated July 20, 2011

Written or reviewed by a board-certified physician. See About.com's Medical Review Board.

Definition:

The Valsalva maneuver is a technique for transiently increasing the tone of the vagus nerve. (Increasing vagal tone can help to stop an episode of supraventricular tachycardia - SVT - or to stop a bout of hiccups.)

The Valsalva maneuver is performed by attempting to exhale against a closed airway. This can be done by keeping the mouth closed and pinching the nose while trying to breath out. This maneuver greatly increases pressures inside the chest cavity - which stimulates the vagus nerve and increases vagal tone.

Holding the Valsalva maneuver for five seconds or so will often terminate an episode of SVT or make hiccups go away.

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