Drugs for Dysrhythmias

Question 1

What is the heart’s ability to conduct?

Answer 1

automaticity

Question 2

What is the “pacemaker” of the heart?

Answer 2

SA node

Question 3

What is the normal order of the path of electrical impulse of the heart?

Answer 3

SA node
R & L atria
AV node
Bundle of His
R & L ventricles
purkinje fibers

Question 4

How fast can the SA node fire?

Answer 4

60-100 bpm

Question 5

What happens if the SA node gives out?

Answer 5

AV node can take over

Question 6

How fast can the AV node fire?

Answer 6

40-60 bpm

Question 7

What happens on the EKG if AV node is initiating conduction cycle?

Answer 7

No P wave

Question 8

What happens if the SA and AV node gives out?

Answer 8

Purkinje fibers initiate impulse

Question 9

How fast can the purkinje fibers fire?

Answer 9

35-40 bpm

Question 10

What is the term for when the pacemaker is NOT the SA node?

Answer 10

ectopic focus (foci)

Question 11

How is the pacemaker determined?

Answer 11

Whichever is the fastest at firing

Question 12

What causes arrhythmias?

Answer 12

Impulse initiation problem and/or blockage of conduction in path

Question 13

What is an AE of antidysrhythmias?

Answer 13

worsen dysrhythmias

Question 14

What is a non-pharmacologic therapies for dysrhythmias?

Answer 14

Defiberilation
Insert pacemaker
Ablation

Question 15

What does defiberilation do to the heart?

Answer 15

Sends powerful electrical shock to heart that TEMPORARILY STOPS the heart to hopefully “reset” it

Question 16

What ion(s) is involved in Depolarization?

Answer 16

Na ions come in, followed by Ca

Question 17

What ion(s) is involved in Repolarization?

Answer 17

K ions go out

Question 19

What is the hyperpolarization also called?

Answer 19

Absolute refractory period

Question 20

What stage of the action potenial is diastole?

Answer 20

Repolarization

Question 21

What stage of the action potential is systole?

Answer 21

depolarization