Dysrhythmia

Question 1

Class 1

Answer 1

Sodium channel blocker

Question 2

Class 2

Answer 2

Beta channel blocker
Act on beta 1 receptors preventing the action of catecholamine on the heart
- Results in decreased heart rate and decreased contractility (CO and BP)

Question 3

Class 3

Answer 3

potassium channel blocker

• may risk torsades des points
• used to treat SVTs and VTs
• prolongs the action potential

Question 4

Class 4

Answer 4

Calcium channel blocker
- good for SV dysrhythmias
NOT for ventricular (lethal)

Question 5

Class 1.a

Answer 5

blocks fast sodium channels which depressed myocardial excitability.

• moderate Na channel blocker
• good for SVT, atrial flutter, atrial fibrillation, sustained ventricular tachycardia
• ex quinidine

Question 6

Class 1.b

Answer 6

decrease in ventricular myocardial excitability

- good for ventricular arrhythmias

Question 7

Lidocaine - class, use and therapeutic index

Answer 7

Class 1.b
used for ventricular arrhythmias
wide therapeutic index

Question 8

Class 1.c

Answer 8

used to treat refractory ventricular arrhythmias

Question 9

Drugs that end in “olol”

Answer 9

beta blockers

Question 10

Amiodarone class and function

Answer 10

class 3 
treats SVT and VTS

Question 11

Wolff-Parkinson-White Syndrome

Answer 11

an extra electrical pathway between your heart’s upper and lower chambers causes a rapid heartbeat