orthodeoxia

orthodeoxia

 [or″tho-de-ok´se-ah] accentuation of arterial hypoxemia in the erect position.

or·tho·de·ox·i·a

(ōr'thō-dē-oks'ē-ă), Fall in arterial blood oxygen on assuming the upright posture. Usually caused by right-to-left cardiac or vascular shunting with a posturally induced fall in left-sided pressure permitting a corresponding gradient across the shunt.

or·tho·de·ox·i·a

(ōr'thō-dē-oks'ē-ă) Fall in arterial blood oxygen on standing upright.