Figure 4. Myocardial and peripheral release of Hydrogen sup + (percentages of baseline values) and regional arterial - venous Hydrogen sup + concentration differences (avDH sup +) in malignant hyperthermia-susceptible (MHS) swine (n = 12) during baseline recordings (t = 0) and after 90 min of halothane exposure (1% inspired) in addition to succinylcholine (3 mg *symbol* kg sup -1 intravenously 15 min after the start of halothane exposure). *P < 0.05 versus baseline; triangles = P < 0.05 MHS versus nMHS.