Suspected malignant hyperthermia after halothane anesthesia in a cat.

A 6 month old domestic shorthaired cat died of suspected malignant hyperthermia and results of microscopic and electron microscopic examination of muscle showed occasional perivascular infiltrates of lymphocytes with infrequent perIMysial and epimysial neutrophils and a few sarcomeres with streaming of Z-bands (suggesting a contracted state).