![]() Second (if no reduction in HR by 20% or HR >100 bpm): 0.35 mg/kg (15-25 mg) IV 9.Initial: 0.25 mg/kg (10-20 mg) IV bolus over 2 minutes.Diltiazem: increases refractory of AV node → slows conduction through AV node → decreases ventricular rate.Since the rate is determined by the AV node, drugs that slow AV conduction are used. ![]()
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