What could cause passing out with bright red face and profouse sweating while on pulmonary function test?
Patient: I had pulmonary function test this a.m. During the first part of the test I passed out while blowing the air out of my lungs at fast volume. Technician said I turned bright red in the face, began sweating profusely, then started trembling as I passed out. He called my cardiologist, who said repeat the test. He did, with the same result. What possible causes are thre for this, and do I need follow up? I had nuclear stress test two weeks ago, results were normal. Doctor: Respected user, hi I evaluated your query thoroughly.*Relates with functional disability of your lungs to cope up with the test  requirements.*May be due to less immunity of lungs to resist certain level of stress to  bronchoalveolar system.*I suggest regular deep breathing exercises with YOGA and fresh air   walking  to rejuvenate your lungs with enough quota of oxygen.*Avoid smoking / alcohol if consuming.Hope this clears your query.Thanks for using Health care magic & reviewing my answer.Wishing you a very happy healthy life ahead.Regards take care.