Drugs To Treat Cardiac Dysrhythmias Flashcards
1
Q
The 4 classifications of Dysrhythmias/arrythmias
A
- Site of origin (atrial, junctional, ventricular)
- true arrthymias (A very disorganised rhythm)
- Tachycardia (fast heart beat)
- Bradycardias (heart best is too low)
2
Q
Name the 5 dysrhythmic mechanisms
A
- Ectopic pacemaker
- Delayed after depolarisation
- re-entry circuits
- conjenital abnormalities
- heart block
3
Q
who are the people at risk from dysrhythmias
A
- conery heart disease
- heart valve disorders
- blood chemistry disorders
- dysrhythmias can also be caused by drugs
4
Q
what is the target channel for class 1 vaughan williams system and drug used to treat it.
A
Sodium channels
Lidocaine
or flecainde, diisopyramide
5
Q
class II VW system channel target and drugs used in treatment
A
Beta 1 adrenoceptors
Atenol/ metaprolol/ proponolol
6
Q
Class III VW system channel target and drugs used in treatment
A
Potassium channels
amidaprone/ sotalol
7
Q
Class IV VW system channel target and drugs used in treatment
A
Calcium channels
Verapamil/ Ditazem
8
Q
What are the weaknesses to the VW system
A
- doesnt count for drugs with multiple mechanisms
- doesnt allow drug actions for diseased and healthy tissues to be different
9
Q
3 types of antidysrhthmic drugs by clinical utility
A
- dugs for dysrhthmic of superventricular origin
- dugs for dysrhthmic of superventricular origin or ventricular origin
- dugs for dysrhthmic of ventricular origin
