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.
Platipneye neden olan sol atriyal miksoma olgusu/ A case of left atrial myxoma as a cause of platypnea.(Orijinal Goruntu/ Original Image)(article in Turkish)
Sep 01, 2006; Elli yasinda erkek hasta bir yildir devam eden ozellikle oturmakla artip, duz yatinca gecen nefes darligi yakinmasi ile...