Drugs Flashcards
Which class of antiarrhythmics are beta blockers?
Class II
Which class of antiarrhythmics works on the sodium channel?
Class I
Which class of antiarrhythmics works on the potassium channel?
Class III
Which class of antiarrhythmics works on the calcium channel?
Class IV
What do class Ia drugs do to the action potential?
Lengthen it
What class are:
Quinidine
Procainamide
Disopyramide
Class Ia
What drugs are class Ia?
Quinidine
Procainamide
Disopyramide
What class are:
Lidocaine
Phenytoin
Mexiletine
Class 1b
What drugs are class 1b?
Lidocaine
Phenytoin
Mexiletine
What class are:
Flecainide
Propafenone
Moricizine
Class 1c
Class 1 drugs that block the fast sodium channel in cardiac tissue cause:
Decreased conduction velocity
the slope of phase 0 is decreased
Drugs that affect phase 0 of the action potential are what class of antiarrhythmic?
Class I
How do Class 1 drugs cause proarrhythmic complications?
By prolonging the QT interval
In individuals who are genetically predisposed
Which class of antiarrhythmics have the most effect on depressing the action potential of the AV and SA nodes?
Class IV (Calcium channel blockers)
Class III antiarrhythmics have what effect on the refractory period of cardiac tissue?
Increase the refractory period