Cardiology MCQ: Classification of antiarrhythmics

Popular classification of antiarrhythmic agents into Class I to IV was proposed by:

A. Willis Hurst B. Eugene Braunwald C. Vaughan-Williams D. André Frédéric Cournand

Correct answer: C. Vaughan-Williams

Vaughan-Williams classification is sometimes called as Singh Vaughan Williams classification as his student Bramah N Singh contributed to the development of the classification system. The popular classification has classes I to IV, of which class I has subclasses IA, IB and IC. A modernized classification published in 2018 added Class 0 and classes V to VII to include drugs with newer mechanism which were not invented when Vaughan-Williams introduced the classification in 1970. That classification had several subclasses for the existing and new classes.