@stevelc I’m referring to a pulmonologist. He is the greatest here where I live (Brazil) in pulmonary vascular diseases. I went to a cardiologist too. I had CTPA, chest CT, echocardiography, vq scan, spirometry, complete PFT, DLCO, body plethysmography… The vq scan showed small diffuse defects of both ventilation and perfusion in my lungs, but these findings were no related to pulmonary embolism and all the follow up tests were normal. Doctor said it could be neurological, dysautonomia…