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breath-holding test


Definition: a rough index of cardiopulmonary reserve measured by the length of time that a person who is a study subject can voluntarily stop breathing; normal duration is 30 seconds or longer; diminished cardiac or pulmonary reserve is indicated by a duration of 20 seconds or less.

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.