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I’m a 62 year old male and was finally diagnosed with MG about a year ago after experiencing some of the normal Vision, muscle weakness and swallowing issues and seems I have developed all the MG symptoms since but the most concerning or most noticeable symptoms are my breathing and muscle weakness’s… I still travel a lot for my job and walking through airports are a nightmare and usually sweating and out of breath by the time I reach my terminal.
My breathing symptoms are very similar to yours and I’ve even relocated out of the Rockies to lower elevation to help with my breathing in addition to using oxygen on bad nights.. I’m a non smoker but was being treated for COPD for the last 10 years after ruling out allergies, asthma, chest X-rays and other respiratory symptoms… About 18 months ago, my breathing was getting worse so I went to a specialty respiratory clinic for my breathing disorders and the Doctor there told me that I definitely have some sort of breathing issues but it was not COPD. He gave me some different inhalers and sent me on my way… Six months later I ended up at my neurologist doctor that diagnosed me with MG and was fairly confident that my breathing issues are definitely related to my MG.. Shortly after that, I ended in the Hospital with my oxygen levels down between 79-82. They brought me back up into the 90’s overnight with oxygen but I have been using oxygen at nights since and using portable tanks in higher elevations visiting my kids…
Hope that helps..
Mark