Which medications in the drug class Antiarrhythmic agents are used in the treatment of Tricyclic Antidepressant Toxicity in Pediatrics?

Updated: Mar 18, 2020
  • Author: Derrick Lung, MD, MPH; Chief Editor: Stephen L Thornton, MD  more...
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Antiarrhythmic agents

Sodium bicarbonate is the initial and most effective drug for the treatment of cyclic antidepressant-induced conduction disturbances and dysrhythmias. Lidocaine and magnesium sulfate should be reserved for dysrhythmias that are unresponsive to alkalization and sodium loading.

Lidocaine (Xylocaine)

Class IB antiarrhythmic that increases electrical stimulation threshold of the ventricle, suppressing automaticity of conduction through the tissue.

Second-line treatment for CA-induced arrhythmias. Alkalinization and sodium loading must be attempted before the use of any antiarrhythmic for CA-induced cardiotoxicity.

Magnesium sulfate

Prevents calcium influx. Also activates sodium-potassium ATPase, thus affecting sodium and potassium transport across cell membranes, which can facilitate the maintenance of the resting potential. May be of particular use in patients with torsade de pointes type of ventricular tachycardia.

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