Ryanodine contracture threshold times for diagnosis of malignant hyperthermia susceptibility: an experimental approach from a single laboratory.

Study Objectives: To define threshold times for ryanodine contracture testing (RCT) using skeletal muscle specimens from malignant hyperthermia-susceptible (MHS) and control individuals.

Design: Prospective study.

Setting: Malignant hyperthermia (MH) laboratory at a university hospital.