Info

Orthopnea

cardiovascular : common

  • left ventricle dysfunction

diaphragm : Rare

primary

  • myelopathy: Trauma
  • Phrenic Nerve: Guillian Barre
  • neuromuscular junction: myasthenia gravis
  • muscle: dermatomyositis

secondary: Load on diaphragm

increase airway pressure

increase abdominal pressure

  • obseity
  • ascites