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Table 1 Clinical grading scale

From: Malignant hyperthermia when dantrolene is not readily available

CGS points MH rank MH probability
0 1 MH probability is almost never
3–9 2 MH probability is unlikely
10–19 3 MH probability is somewhat less than likely
20–34 4 MH probability is somewhat greater than likely
35–49 5 MH probability is very likely
50–108 6 MH probability is almost certain