I have mild breathing problem, I was a good smoker till two years back for more than a decade. Nos am 64 yrs. Generally I feel some sort of whistling sound from inside, may be some time while sleeping also some time. When I take inhaler forocart 200, in 5 to 19 min, breathing will be alright. Last week I could not take in immediately when I felt short breathing while in market, but I could not reach home by walk, in between I felt uneasiness with cough, motion also came out, in the road itself I felt unconscious. People feathered informed my wife and took me to borrow hospital. In the way to hospital I have been given mouth to mouth respiration by pressing chest continuously. After reaching hospital I regained conscious and given nebulisation and became alright in one hour. I like to know, whyit happened to me? is there some thing serious in such condition? what are the precautions I should take while travelling by air or rail or by walk? please revert and thanks.