<prompt> Platypnea means-Dyspnea in the supine position and relief in upright positionDyspnea in the upright position with relief in the supine positionDyspena on exeionDyspnea waking up the patient during deep sleep  <response>: Platypnea is defined as dyspnea in the upright position with relief in the supine position.It is seen in left atrial myxoma or hepatopulmonary syndrome. Ref:Harrisons medicine-18th edition,page no:279 