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Pronunciation: or'tho-per-kush'un

Definition: Very light percussion of the chest, made in a sagittal direction (anteroposteriorly, and not perpendicularly to the wall of the chest); used to determine the size of the heart, with the faint percussion sound disappearing when the heart is reached, even though that may be overlapped by a layer of the lung.

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