Clacium channel blockers (Class IV antiarrhythmic drugs) Flashcards
1
Q
Which group of drugs is considered class IV antiarrhythmic drugs?
A
Calcium channel blockers
2
Q
Which Ca channel blockers are used as antiarrhythmic drugs?
A
Verapamil and diltiazem.
Other Ca channel blockers have no role in treatment of arrhythmias.
3
Q
Verapamil and diltiazem - effects
A
Decrease AV node conduction velocity.
Increase AV node refractory period.
Small effect on the SA node and HR.
4
Q
Diltiazem and verapamil - adm
A
Intravenously
5
Q
Diltiazem and verapamil - indications as antiarrhythmics
A
Terminate SVT.
Reduce ventricular rate in AF.
6
Q
Verapamil and diltiazem - adverse effects
A
May exacerbate VT.
