In vitro diagnosis of malignant hyperthermia: influence of electrical stimulation on the contracture response to caffeine.

Abstract:

:We have examined the influence of electrical stimulation on caffeine-induced tension generation during contracture testing used to diagnose malignant hyperthermia. The cumulative contracture response to caffeine was compared in pairs of morphologically comparable muscle bundles obtained from the same patient. Only one of the two bundles was stimulated electrically during the test. Statistically significant differences in tension were found at caffeine concentrations greater than or equal to 4 mmol litre-1, the tension developed being invariably larger in the unstimulated fascicles. These results suggest that electrical stimulation results in suppression of the dose-dependent, caffeine-induced contracture. This effect could be a result of the potentiation of twitch tension by caffeine, muscle fatigue, or both. Overall, the observed differences did not alter the in vitro diagnosis of malignant hyperthermia.

journal_name

Br J Anaesth

authors

Heytens L,Martin JJ,Bossaert LL

doi

10.1093/bja/69.1.87

subject

Has Abstract

pub_date

1992-07-01 00:00:00

pages

87-91

issue

1

eissn

0007-0912

issn

1471-6771

pii

S0007-0912(17)46548-2

journal_volume

69

pub_type

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