Drugs to Treat Arrythmias

Question 1

signal originates where

Answer 1

SA Node

Question 2

Which node sends the signal to the ventricles

Answer 2

AV node

Question 3

P wave reflects ___

Answer 3

Depolarization of the SA node

Question 4

PR interval describes ___

Answer 4

time it takes for impulse to go from the SA node to AV node

Question 5

QRS complex describes -___

Answer 5

Depolarization of right and left ventricles

Question 6

T wave shows ____

Answer 6

repolarization of the ventricles

Question 7

U wave shows

Answer 7

Repolarization of interventricular septum

Question 8

Primary AV block

Answer 8

PR interval lengthened beyond .2 seconds

Question 9

secondary AV block

Answer 9

disturbance, delay, interruption of atrial impulse

Question 10

tertiary AV block

Answer 10

complete heart block

Question 11

Class I anti-arrhythmic drugs block

Answer 11

Block Na+ channels

Question 12

Class II anti-arrhythmic drugs are

Answer 12

B-adrenoceptor antagonists

Question 13

Class III anti-arrhythmic drugs prolong

Answer 13

action potential and prolong refractory period (K+ blockers)

Question 14

Class IV anti-arrhythmic drugs are

Answer 14

Ca channel antagonists

Question 15

Beta blockers can diminish ____

Answer 15

Na and Ca currents

Question 16

Blocking Cardiac Ca currents results in

Answer 16

Slower conduction, increased refractory period