"Gasping respiration is also referred to as agonal respiration and the name is appropriate because the gasping breaths appear uncomfortable and raise concern that the patient is suffering and in agony." (quote from a medical issue)

Google "last gasp of a dying"...and the metaforical use of agony appears to be applicable for whatever thing. Is it just another way of using agony? The last gasp a synonym for agony?

Last gasp of dying ashes

last gasp of a dying genre (the agony of a genre)? etc.

Last Gasp of a Dying Idiotologylast gasp of a dying dogma

Project Car Hell, Dying Marque's Last Gasp Edition: Kaiser Manhattan or Packard Clipper?