Low doses of intravenous epinephrine for refractory sustained monomorphic ventricular tachycardia

Figure 2 V4 to V6 leads also from patient 1. A: Ventricular tachycardia (VT) at admission with a heart rate (HR) of 170 beats/min, blood pressure (BP) 125/86 mmHg. Amiodarone (300 mg intravenous) did not interrupt VT, no substantial change was observed in VT cycle length, BP dropped to 89/46 mmHg; B: Immediately after a bolus of epinephrine (1 mg over 30 s), an increase in HR up to 180 beats/min was observed; C: Electrocardiogram 30 s after epinephrine bolus: sinus tachycardia (HR 110 beats/min) after VT termination.