<prompt> Normal PCWP with pulmonary oedema is seen inLeft atrial myxomaHigh altitudePulmonary vein obstructionPulmonary aery obstruction  <response>: Ref Harrison 19 th ed pg 1763 The use of a Swan-Ganz catheter permits measurement of PCWP and helps differentiate high-pressure cardiogenic from normal- pressure noncardiogenic causes of pulmonary edema. High altitude has been grouped together as one of the miscellaneous causes for ARDS reflecting pulmonary oedema with a normal PCWP 