Cardiology
·Cardiology
Antiarrhythmics — Vaughan Williams Classification
⭐ PREMIUM
CLASS I — Na channel blockers
• IA (intermediate): Quinidine, Procainamide, Disopyramide → ↑ QT
• IB (fast): Lidocaine, Mexiletine — ventricular arrhythmias post-MI
• IC (slow): Flecainide, Propafenone — AF (in normal hearts only)
CLASS II — β-blockers (atenolol, metoprolol, esmolol)
• SVT, AF rate control, post-MI
CLASS III — K channel blockers
• Amiodarone, Sotalol, Dofetilide
• Most arr…
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