24. Antiarrhythmics- II Flashcards
1
Q
A patient is given a Class one antiarrhythmics that blocks Na channels and causes a significant increase in the QRS. Of the listed which fits this description?
A. Mexiletine B. Procainamide C. Lidocaine D. Propafenone E. Disopyramide
RFA
A
ANS. D Propafenone- the description of the action describes a class 1C
A &C - are class IB, Block Na channels with small increase in QRS. Clinically insignificant decrease in QT
B & E- Class 1A, Block both Na and K channels increase both QRS and QT
2
Q
A 59 year old woman comes to here greyish blue skin do to an adverse effect of a medication she was given to treat her arrhythmic heart. What medication is causing these issues
.
A.Sotalol B. Esmolol C. Amiodarone D. Dofetilide E. Diltiazem
RFA
A
ANS. C -Amiodarone
