Malignant hyperthermia (MH) was described 60 yr ago and understanding of the clinical and pathophysiologic features of this syndrome continue to advance. MH is attributed to a genetically determined susceptibility to an abnormal skeletal muscle cell calcium flux triggered by potent inhalation anesthetics (e.g., isoflurane) or succinylcholine. Since dantrolene sodium was approved in 1979, the mortality from MH dropped substantially but remains 4 to 10%. The exact incidence of MH reactions is unknown but may be as high as 1 in 25,000 anesthetics. Variants in three genes cause the susceptibility to this disorder. The RYR1 gene is most common followed by CACNA1S and STAC3. While the caffeine–halothane contracture test and the in vitro contracture test are considered the gold standards for diagnosis of susceptibility to MH, there have been important advances in genetic testing. Due to these advances, it is timely for the field to consider the utility and practicability of screening for malignant hyperthermia susceptibility using genomic testing. Here the authors pose a simple, but bold question: what would it take to end deaths from malignant hyperthermia? The authors review recent advances and propose a scientific and clinical pathway toward this audacious goal to provoke discussion in the field.
Genomic Screening for Malignant Hyperthermia Susceptibility
Submitted for publication May 19, 2020. Accepted for publication August 11, 2020.
Michael J. Avram, Ph.D., served as Handling Editor for this article.
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Leslie G. Biesecker, Robert T. Dirksen, Thierry Girard, Philip M. Hopkins, Sheila Riazi, Henry Rosenberg, Kathryn Stowell, James Weber; Genomic Screening for Malignant Hyperthermia Susceptibility. Anesthesiology Newly Published on September 7, 2020. doi:https://doi.org/10.1097/ALN.0000000000003547
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