Paper I — 2023 July (Supplementary) (2010 Scheme) — Q15
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Paper I
2023 July (Supplementary) (2010 Scheme) · 40 marks · 120 min
Question
Verapamil/Nifedipine in supra ventricular arrhythmias
Name the following (Two examples for each): (5x1=5)
Q150.3 marksShort Answers
Answer
Verapamil is the appropriate choice — a non-dihydropyridine calcium channel blocker with significant action at the AV node, slowing conduction and terminating/controlling rate in supraventricular tachyarrhythmias. Nifedipine, a dihydropyridine, is highly vascular-selective with minimal direct effect on cardiac conduction tissue, so it has no meaningful antiarrhythmic action and is not used for this indication — its role is confined to hypertension and angina.
