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(A) Monitoring electrocardiogram (ECG) (lead II) at epinephrine provocation test, soon after epinephrine 0.1 μg/kg bolus injection (0 min) followed by 0.1 μg/kg/min continuous injection (1– 2 min). (B–D) A standard 12-lead ECG at baseline before the treadmill exercise testing (B), during peak exercise by the standard Bruce protocol (C) and recovery 4 min after exercise testing (D) when the patient was 19 years old and taking the beta-blocker, propranolol 75 mg/day.
