The class 1 sodium channel blocker is used as an antiarrhythmic, which works by decreasing the rate of Na⁺ movement into a cell through the sodium fast channel most commonly used is

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Lidocaine is a class 1 sodium channel blocker used as an antiarrhythmic agent. It works by decreasing the rate of sodium ions moving into the cell through the sodium fast channel, which helps to stabilize the cardiac membrane and treat arrhythmias.

The Class 1 Sodium Channel Blocker Is Used as an Antiarrhythmic