Antiarrhythmias

Question 1

class I blocks ____

Answer 1

Na channels

Question 2

class II blocks ____

Answer 2

beta receptors

Question 3

class III blocks ____

Answer 3

K efflux

Question 4

class IV blocks ____

Answer 4

Ca channel

Question 5

What class? Lidocaine

Answer 5

IB

Question 6

What class? Flecainide

Answer 6

IC

Question 7

What class? Amiodarone

Answer 7

III

Question 8

What class? Diltiazem

Answer 8

IV

Question 9

What class? Metoprolol

Answer 9

II

Question 10

What class? Quinidine

Answer 10

IA

Question 11

What class? Mexiletine

Answer 11

IB

Question 12

What class? Sotalol

Answer 12

III

Question 13

What class? Verapamil

Answer 13

IV

Question 14

What class? Procainamide

Answer 14

IA

Question 15

What class? Dronedarone

Answer 15

III

Question 16

What class? Ibutalide

Answer 16

III

Question 17

Which classes have risk of long QT syndrome?

Answer 17

IA, III

Question 18

Contraindicated in WPW

Answer 18

Any rate control drug
Class II (beta), IV (Ca)

Question 19

Used to treat inherited long QT syndrome, the Na channel mutation

Answer 19

Mexiletine (IB)

Question 20

Rhythm control for VT or SVT if there is no history of MI/ischemic disease

Answer 20

Flecainide (IC)

Question 21

Blocking _____ increases APD

Answer 21

K+ efflux

Question 22

Blocking _____ and ______ increases ERP

Answer 22

Na channels

Ca channels

Question 23

First line rhythm control for VT in structurally abnormal hearts (post MI)

Answer 23

Amiodarone

after cardioversion

Question 24

Causes the longest ERP

Answer 24

Flecainide (IC)

Question 25

First line for Afib rhythm control

Answer 25

Amiodarone

Question 26

Rhythm control for patients with ICD

Answer 26

Sotalol

Question 27

Use for acute chemical cardioversion in Afib

Answer 27

IV Ibutalide (III)

Question 28

2nd line rhythm control for VT post-MI (or hx ischemic disease)

Answer 28

IV Lidocaine (IB)

Question 29

Use for re-entry tachycardias

Answer 29

Class I

Question 30

Decreasing conduction velocity will ______ERP

Answer 30

Increase

Question 31

Contraindicated in CHF

Answer 31

Class IV (Verapamil, diltiazem)

Question 32

Rate control classes

Answer 32

II & IV

even rate

Question 33

Rhythm control classes

Answer 33

I & III

odd rhythm

Question 34

inhibits Na/K ATPase

increases vagal activity

Answer 34

Digoxin

Question 35

Consider for Afib in CHF

Answer 35

Digoxin

Question 36

Increases K efflux, hyper polarizing the cell

Answer 36

Adenosine

opposite MOA as Class III

Question 37

Use for AV-node dependent narrow complex tachycardia

Answer 37

IV Adenosine

Question 38

Use for Afib

Answer 38

verapamil
diltiazem
metoprolol
(II & IV)

Question 39

Only treats VT

Answer 39

Class IB (Lidocaine)

Question 40

Only treats SVT

Answer 40

Class II & IV
Digoxin
Adenosine
(rate control)