Class I Antiarrhythmics - Atrial Flutter

[DocMiami]

Treatment of atrial flutter with Class I drugs may cause sudden increases in the ventricular rate from below 100/ min to above 200/min due to a sudden decrease in the AV conduction ratio from e.g. 6-4:1 to 1:1 (Fig. 4.7).

Can someone please clarify this 🙂 Thank yoU!

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[Jamie561]

Treatment of atrial flutter with Class I drugs may cause sudden increases in the ventricular rate from below 100/ min to above 200/min due to a sudden decrease in the AV conduction ratio from e.g. 6-4:1 to 1:1 (Fig. 4.7).

Can someone please clarify this 🙂 Thank yoU!

the class 1 antiarrhythmic drug can increase conduction so all beats are conducted. when the V rate is so high its bad


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