Low-dose Epinephrine Infusion Tests in Adolescent and Pediatric Patients

We will follow the protocol outlined by Ackerman et al. known as the Mayo protocol4 which is currently used routinely in our electrophysiology laboratory. Epinephrine infusion will begin at 0.025 ug/kg/minute, for ten minutes and a twelve-lead electrocardiogram is obtained at time=0 minutes, 5 minutes, and 10 minutes. The epinephrine infusion will then be increased to 0.05 ug/kg/minute for five minutes and the electrocardiogram repeated. The epinephrine infusion will then be increased to a maximal dose of 0.1 ug/kg/minute for five minutes and electrocardiogram obtained. The epinephrine infusion is then discontinued and measurements are obtained at five minutes and ten minutes after stopping the epinephrine infusion. The total time of procedure will be 35 minutes.