title: Postanesthetic recumbency associated with hyperkalemic periodic paralysis in a quarter horse.
abstract: Anesthesia and surgery in a Quarter Horse affected with hyperkalemic periodic paralysis resulted in euthanasia after 7 days of postoperative recumbency. Initial recovery was uneventful after extensive sinus surgery, but within 2 hours, the horse had severe muscle weakness. Plasma electrolyte concentrations were within the normal range during the period of recumbency. There was no clinical or laboratory evidence of severe muscle damage. Despite treatment with acetazolamide, isoproterenol, and intensive nursing, the horse was unable to stand for more than a few seconds and developed severe decubital ulcers. Ultrastructural examination revealed nemaline rods and swollen mitochondria in disrupted myofibers.
authors.affiliation: Department of Large Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville 32610.
authors.forename: S A
authors.initials: SA
authors.lastname: Robertson
authors.forename: S L
authors.initials: SL
authors.lastname: Green
authors.forename: S W
authors.initials: SW
authors.lastname: Carter
authors.forename: B N
authors.initials: BN
authors.lastname: Bolon
authors.forename: M P
authors.initials: MP
authors.lastname: Brown
authors.forename: R P
authors.initials: RP
authors.lastname: Shields
mesh_terms: D000768:Anesthesia, General / Q000662:veterinary*; D000818:Animals; D006734:Horse Diseases / Q000209:etiology* / Q000473:pathology / Q000601:surgery; D006736:Horses; D006947:Hyperkalemia / Q000150:complications / Q000662:veterinary*; D008297:Male; D010243:Paralysis / Q000209:etiology / Q000473:pathology / Q000662:veterinary*; D011183:Postoperative Complications / Q000209:etiology / Q000662:veterinary*; D003668:Pressure Ulcer / Q000209:etiology / Q000662:veterinary; D012852:Sinusitis / Q000601:surgery / Q000662:veterinary