Has a role in treating patients with CPVT INa , IKr , IKur PR prolonged QRS prolonged; increased DFT : 7 22 h Metab: H Excr: U Cardiac: Sinus node dysfunction, AVB, drug-induced Brugada syndrome, monomorphic VT in patients with a myocardial scar, exacerbation of HFrEF Other: Dizziness, tremor, vision disturbance, dyspnea, nausea Lidocaine (IB) IV: 1 mg/kg bolus, 1 3 mg/min 1 1.5 mg/kg. Repeat 0.5 0.75 mg/kg bolus every 5 10 min (max cumulative dose 3 mg/kg). Maintenance infusion is 1 4 mg/min although one could start at 0.5 mg/min VT, VF INa No marked effect on most intervals; QTc can slightly shorten terminal 90 120 min. 