About three weeks ago I went in for a CT scan of my Thymus, part of the regular protocol for MG treatment at the "Thrive" HMO that I am privileged to entrust my life to. The CT scan required an intravenous radio-sensitive "dye," often called a contrasting agent. When they fed the contrast dye into my vein my cardio and respiratory systems instantly went into into pedal-to-metal overdrive, as if I was suddenly running a hundred yard dash and my blood had been replaced with a mixture of lava and rocket fuel. I was unable to inhale and hold my chest cavity in the required stationary position and thought frankly that I was going to die right there in the CT scan machine. I got out of there alive but my MG symptoms, particularly weak breathing, have worsened since that time and have not yet reached the "pre-CT scan" level. Has anyone had a similar experience, or can anyone shed some light on what the heck happened to me in there? Thanks.