Platypnea

Platypnea

In medicine, platypnea refers to shortness of breath (dyspnea) that worsens when sitting or standing up. It is the opposite of orthopnea. The word is derived from the Greek platus (= flat) and pnoia (=breath).

Platypnea is due to either hepatopulmonary syndrome or an anatomical cardiovascular defect increasing positional right-to-left shunting (bloodflow from the right to the left part of the circulatory system). These defects include rare syndromes in which the venous blood from the liver does not pass through the lungs, or if venous blood from the portal circulation reaches the inferior vena cava without passing through the liver (Abernethy malformation, type 1).

Insuficiency of abdominal muscles causes lower diafragm position and dyspnea. In clinostatism, abdominal organs push the diafragm in his normal, upper position, reducing the respiratory effort.

Search another word or see platypneaon Dictionary | Thesaurus |Spanish
Copyright © 2014 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature
FAVORITES
RECENT

;