anti-arrhythmics Flashcards
1
Q
class IA
- definition
- what do they do to APD
- what do they do to ERP
A
- moderate Na channel blocker–moderate reduction in phase 0 slope
- increase
- increase
2
Q
class IB
- definition
- what do they do to APD
- what do they do to ERP
A
- weak Na channel blocker
- small reduction in phase 0 slope
- reduce ADP
- decrease ERP
3
Q
class IC
- definition
- what do they do to APD
- what do they do to ERP
A
- strong Na channel blocker
- large reduction in phase 0 slope
- no effect on APD
- no effect on ERP
4
Q
class II
A
beta blckers
5
Q
class III
- definition
- what do they do to APD
- what do they do to ERP
A
K channelk blocker
delay APD
increase ERP
6
Q
class IV
- definition
- what do they do to APD
- what do they do to ERP
A
- Ca channel blocker
most effective at SA and AV node
reduce rate and conduction
7
Q
Procainamide
- class
- Use
A
IA
most atrial and ventricular arrhythmias
8
Q
Lidocaine
- class
- use
A
IB
terminates VT and prevents VF after cardioversion
9
Q
Flecainide
- class
- use
A
IC
SVT in patients w/ normal heart
10
Q
Class II use
A
atrial arrhythmia and prevention of recurrent infarction and sudden death
11
Q
Amiodarone
- class
- use
A
III
serious ventricular arrhythmias and supraventricular arrhythmias
12
Q
Dofetilide
- class
- use
A
III
maintenance or restoration of sinus rhythm in Afib
13
Q
Verapamil
- class
- use
A
IV–CCB
SVT, HTN, Angina
14
Q
what’s caveat with Class III
A
can increase QT and facilitate EADs leading to PMVT
15
Q
which is the only antiarrhythmic that has ever been shown to improve mortality in post infarct patient?
A
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