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Yu KD, Betts MN, Urban GM, Schwartz MLB, Robinson TO, Moyer RJ, Taddonio SW, Vasudevan A, Johns A, Sturm AC, Kelly MA, Williams MS, Poler SM, Buchanan AH. Evaluation of Malignant Hyperthermia Features in Patients with Pathogenic or Likely Pathogenic RYR1 Variants Disclosed through a Population Genomic Screening Program. Anesthesiology 2024; 140:52-61. [PMID: 37787745 DOI: 10.1097/aln.0000000000004786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
BACKGROUND Malignant hyperthermia (MH) susceptibility is a heritable musculoskeletal disorder that can present as a potentially fatal hypermetabolic response to triggering anesthesia agents. Genomic screening for variants in MH-associated genes RYR1 and CACNA1S provides an opportunity to prevent morbidity and mortality. There are limited outcomes data from disclosing variants in RYR1, the most common MH susceptibility gene, in unselected populations. The authors sought to identify the rate of MH features or fulminant episodes after triggering agent exposure in an unselected population undergoing genomic screening including actionable RYR1 variants. METHODS The MyCode Community Health Initiative by Geisinger (USA) is an electronic health record-linked biobank that discloses pathogenic and likely pathogenic variants in clinically actionable genes to patient-participants. Available electronic anesthesia and ambulatory records for participants with actionable RYR1 results returned through December 2020 were evaluated for pertinent findings via double-coded chart reviews and reconciliation. Descriptive statistics for observed phenotypes were calculated. RESULTS One hundred fifty-two participants had an actionable RYR1 variant disclosed during the study period. None had previous documented genetic testing for MH susceptibility; one had previous contracture testing diagnosing MH susceptibility. Sixty-eight participants (44.7%) had anesthesia records documenting triggering agent exposure during at least one procedure. None received dantrolene treatment or had documented muscle rigidity, myoglobinuria, hyperkalemia, elevated creatine kinase, severe myalgia, or tea-colored urine. Of 120 possibly MH-related findings (postoperative intensive care unit admissions, hyperthermia, arterial blood gas evaluation, hypercapnia, or tachycardia), 112 (93.3%) were deemed unlikely to be MH events; 8 (6.7%) had insufficient records to determine etiology. CONCLUSIONS Results demonstrate a low frequency of classic intraanesthetic hypermetabolic phenotypes in an unselected population with actionable RYR1 variants. Further research on the actionability of screening for MH susceptibility in unselected populations, including economic impact, predictors of MH episodes, and expanded clinical phenotypes, is necessary. EDITOR’S PERSPECTIVE
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Affiliation(s)
- Kristen D Yu
- Department of Genomic Health, Geisinger, Danville, Pennsylvania
| | - Megan N Betts
- Department of Genomic Health, Geisinger, Danville, Pennsylvania; WellSpan Health, York, Pennsylvania
| | | | - Marci L B Schwartz
- Department of Genomic Health, Geisinger, Danville, Pennsylvania; Division of Clinical and Metabolic Genetics, and Ted Rogers Centre for Heart Research, Cardiac Genome Clinic, The Hospital for Sick Children, Toronto, Canada
| | | | - Robert J Moyer
- Department of Anesthesiology, Geisinger, Danville, Pennsylvania
| | - Scott W Taddonio
- Department of Anesthesiology, Geisinger, Danville, Pennsylvania; Department of Anesthesiology, Jefferson Health, Philadelphia, Pennsylvania
| | - Anasuya Vasudevan
- Department of Anesthesiology, Geisinger, Danville, Pennsylvania; Vigilant Anesthesia PC, New York, New York
| | - Alicia Johns
- Department of Population Health Sciences, Geisinger, Danville, Pennsylvania
| | - Amy C Sturm
- Department of Genomic Health, Geisinger, Danville, Pennsylvania; 23andMe, Sunnyvale, California
| | - Melissa A Kelly
- Department of Genomic Health, Geisinger, Danville, Pennsylvania
| | - Marc S Williams
- Department of Genomic Health, Geisinger, Danville, Pennsylvania
| | - S Mark Poler
- Department of Anesthesiology, Geisinger, Danville, Pennsylvania
| | - Adam H Buchanan
- Department of Genomic Health, Geisinger, Danville, Pennsylvania
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Glahn KP, Bendixen D, Girard T, Hopkins PM, Johannsen S, Rüffert H, Snoeck MM, Urwyler A. Availability of dantrolene for the management of malignant hyperthermia crises: European Malignant Hyperthermia Group guidelines. Br J Anaesth 2020; 125:133-140. [DOI: 10.1016/j.bja.2020.04.089] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 04/29/2020] [Accepted: 04/30/2020] [Indexed: 11/28/2022] Open
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