Which class of antiarrhythmic drugs is known to block potassium channels?
Understand the Problem
The question is asking about the classification of antiarrhythmic drugs and specifically which class is known for blocking potassium channels. It identifies four different classes of drugs and asks to select the correct one.
Answer
Class III
The final answer is Class III.
Answer for screen readers
The final answer is Class III.
More Information
Class III antiarrhythmic drugs work by blocking potassium channels in the cardiac tissue. This blockade slows down electrical impulses, prolonging the refractory period of the heart cells, which can stabilize irregular heartbeats.
Tips
A common mistake is confusing Class III with Class I or Class IV antiarrhythmics, which act on sodium and calcium channels, respectively.
Sources
- What are Antiarrhythmics? - Cleveland Clinic - my.clevelandclinic.org
- Class III Antiarrhythmic Drugs (Potassium Channel Blockers) - cvpharmacology.com
- Class 3 Antiarrhythmic Drugs (Potassium Channel Blockers) - Lecturio - lecturio.com
AI-generated content may contain errors. Please verify critical information
