L4 Drugs Affecting the Cardiac Action Potential Flashcards
1
Q
what are the differences in how class 1, 2, 3, and 4 drugs act?
A
Class 1 - Na+ Channel Blocker
Class 2 - B-blocker
Class 3 - K+ Channel Blocker
Class 4 - Ca2+ Channel Blocker
2
Q
where do the classes of drugs affect the cardiac action potential?
A
Class 1 - phase 0
Class 2 - phase 4
Class 3 - phase 3
Class 4 - phase 2
3
Q
which drugs are Class 1a (moderate)?
A
Quinidine and Procainamide
4
Q
which drugs are Class 1b (weak)?
A
Lidocaine and Phenytoin
5
Q
which drugs are Class 1c (strong)?
A
Flecainide and Propafenone
6
Q
which drugs belong to Class 2?
A
Propranolol and Metaprolol
7
Q
which drugs belong to Class 3?
A
Amiodarone and Sotalol
8
Q
which drugs belong to Class 4?
A
Verapamil and Ditiazem
