Malignant Hyperthermia, Susceptibility To, 4

For a phenotypic description and a discussion of genetic heterogeneity of malignant hyperthermia, see MHS1 (145600).

Mapping

In a single German pedigree with classic malignant hyperthermia, Sudbrak et al. (1995) found a maximum multipoint lod score of 3.22 for linkage to markers defining a 1-cM interval on 3q13.1. The malignant hyperthermia phenotype was determined by the in vitro contracture test (IVCT) performed on a sample of freshly obtained muscle.