Vaughan Williams classification

Vaughan Williams classification is a system used to categorize anti-arrhythmic drugs based on how they affect the heart's electrical signals. It divides them into four main classes: Class I drugs block sodium channels and slow electrical impulses; Class II includes beta-blockers that reduce the heart rate; Class III drugs prolong the electrical recovery period, helping prevent rapid rhythms; and Class IV consists of calcium channel blockers that relax heart muscles and slow conduction. This system helps doctors choose the right medication to treat different types of irregular heartbeats efficiently.