My wife's corgi-dachshund mix had one last year when I picked her up to go to the bed. Then she went limp and evacuated her bowels and I thought she died in my hands. I started trying a version of CPR compressions and she snapped out of it after about a minute. Scared the **** out of me and my wife was a mess. Took her to the vet and they said she has a collapsing trachea and wasn't getting enough air.
She was 14 (now 15) and is too old for any procedures. Still energetic and full appetite and its never happened again although she definitely gets coughing fits. Figured as long as she seems happy we will let it ride. Old gal is probably blind, deaf and creaky in the joints but she's over there snoring in a big bed so we're happy to have her