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Hemodynamic changes during three techniques for induction of halothane anesthesia were studied in 90 healthy infants aged 5 to 26 weeks who were randomly divided into three groups of 30 patients each. In group I, anesthesia was induced using halothane in concentrations that were increased to 3%. In group II, atropine, 0.02 mg/kg, was given intramuscularly before induction, followed by induction as in group I. In group III, halothane in concentrations that were increased to 1.25% was followed by intramuscular succinylcholine, 2 mg/kg, 90 seconds after the start of induction. In all three groups N 2 O 3 L/min and O 2 2 L/min were employed using a non-rebreathing system. Heart rate (HR) and blood pressure (BP) were recorded at 1-minute intervals for 20 minutes. HR decreased 30% in group 1, 18% in group II (p< 0.01), and 29% in group III. BP decreased 50% in group I (p< 0.01), 34% in group II, and 33% in …