Cardio Pharmacology - Antiarrhythmic Drugs Flashcards
1
Q
Class I
A
reduce Na channel current
2
Q
class II
A
B adrenoreceptor antagonist (decrease rate of depolarisation in SA/AV node)
3
Q
class III
A
K channel blockers (prolong refractory period)
4
Q
class IV
A
CCB (slow conduction in SA/AV node)
5
Q
class I/III used for?
A
rhythm
6
Q
class II/IV used for?
A
rate
7
Q
class IA?
A
associate and dissociate from Na channels at a moderate rate
slow rise of AP, prolonged refractory period
8
Q
class IB?
A
associate and dissociate at a rapid rate
prevents premature beats
9
Q
class IC?
A
associate and dissociate at a slow rate
depress conduction
10
Q
when is flecainide used and what class is it?
A
class IC used in stable and chronic AF
11
Q
when is amiodarone used and what class is it?
A
class III used in atrial flutter, chronic AF (structural disease), AF
