Paper I — 2021 December (Supplementary) (2010 Scheme) — Q10

Paper I

2021 December (Supplementary) (2010 Scheme) · 40 marks · 120 min

Question

Verapamil in paroxysmal supra ventricular tachycardia

Q101 marksShort Answers★✓

Answer

Verapamil blocks L-type calcium channels in the AV node, slowing AV nodal conduction and prolonging its refractory period. Since paroxysmal SVT commonly involves a re-entrant circuit through the AV node, this AV nodal blockade interrupts the re-entrant pathway, terminating the arrhythmia and restoring normal sinus rhythm — making verapamil (alongside adenosine) an effective acute treatment for PSVT.

Related Concepts

1. 1Antiarrhythmic Drugs

Other Years Asked

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3. 3Calcium channel blockers2013 April (2010 Scheme)Short Note · 3 marks
4. 4Propranolol2022 May (Supplementary) (2010 Scheme)Short Note · 3 marks
5. 5Supraventricular arrhythmias2014 March (2010 Scheme)Short Answer · 1 mark
6. 6Assertion (A): Quinidine can cause QT prolongation. Reason (R): Class IA drugs have maximum sodium channel blocking effect.2025 March (Supplementary (SAY)) (2019 Scheme)MCQ (A/R) · 1 mark
7. 7Assertion (A): Lignocaine is one of the preferred drugs in paroxysmal supraventricular tachycardia. Reason (R): Lignocaine is a blocker of inactivated Na+ channels more than that of open state. It is relatively selective for partially depolarized cells and those with longer action potential duration.2024 December (Supplementary) (2019 Scheme)MCQ · 1 mark
8. 8Used in the treatment of atrial fibrillation2018 February (2010 Scheme)Short Answer · 1 mark
9. 9Verapamil2022 May (Supplementary) (2010 Scheme)Short Answer · 1 mark
10. 10Supra ventricular tachycardia.2014 September (Supplementary) (2010 Scheme)Short Answer · 1 mark
11. 11Drugs for Paroxysmal Supra Ventricular Tachycardia (PSVT)2021 May (Supplementary) (2010 Scheme)Short Answer · 0.3 marks
12. 12Nifedipine in supra ventricular arrhythmias Name the following (Two examples for each): (5x1=5)2023 July (Supplementary) (2010 Scheme)Short Answer · 0.3 marks