Antidysrythmics

Question 1

where is the origin of supra ventricular tachycardias?

Answer 1

the atria

Question 2

what is the most common type of supra ventricular tachycardia?

Answer 2

atrial fibrillation

Question 3

Why is AV block desirable with supra ventricular dysrhythmias?

Answer 3

because less of the underside activity would get transmitted to ventricles

Question 4

ventricular/atrial cardiac muscle cells depend on?

Answer 4

sodium and potassium

Question 5

action potential of ventricular/atrial muscle cells start with ______ and end with _______

Answer 5

start with sodium influx and end with potassium efflux

Question 6

Class 1 antidysrhythmic drugs

Answer 6

sodium channel blockers

Question 7

Class 2 antidysrythmics

Answer 7

beta blockers

Question 8

Class 3 antidysrhythmics

Answer 8

potassium channel blockers and others

Question 9

Class 4 antidysrthymics

Answer 9

calcium channel blockers

Question 10

class 5 antidysrhythmics

Answer 10

adenosine and digoxin

Question 11

All class 1 antidysrhythmics block?

Answer 11

sodium channels and slow depolarization

Question 12

Class 1A prototype?

Answer 12

quinidine

Question 13

quinidine is used for?

Answer 13

acute onset atrial fibrillation

Question 14

quinidine slows atrial and ventricular rates but?

Answer 14

does not affect rhythm

Question 15

wolff-parkinson-white syndrome is associated with?

Answer 15

quinidine

Question 16

Class 1 B prototype?

Answer 16

lidocaine

Question 17

lidocaine is used for ______ only

Answer 17

ventricular dysrhythmias

Question 18

class II prototype?

Answer 18

metoprolol

Question 19

how does metoprolol work?

Answer 19

reduces or blocks SNS stimulation and creates AV block

Question 20

Class III prototype?

Answer 20

amiodarone

Question 21

how does amiodarone work?

Answer 21

it blocks potassium channels therefore prolonging depolarization and cardiac action potential

Question 22

downside of amioderone?

Answer 22

can have very serious adverse effects if used for longer than 6 months.

Question 23

amioderone is commonly used in those who are?

Answer 23

resistant to other drugs

Question 24

Prototype for class IV?

Answer 24

diltiazem and verapamil

Question 25

Where do diltiazem and verapamil act?

Answer 25

on the AV node to inhibit Ca entry and reduce conduction velocity

Question 26

Diltiazem and verapamil are not used for?

Answer 26

ventricular dysrhythmias

Question 27

diltiazem and verapamil control?

Answer 27

rate for atrial fibrillation and flutter

Question 28

what are the unclassified antridysrhythmics?

Answer 28

adenosine and digoxin

Question 29

How does adenosine work?

Answer 29

slows conduction through the AV node and causes AV block

Question 30

What is the half life of adenosine?

Answer 30

20 to 30 seconds

Question 31

adenosine is only administered as?

Answer 31

fast IV push