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Pharmacology: Class Ia Anti-arrhythmics

Total questions: 11

Worksheet time: 7mins

Name
Class
Date
1.

Class I anti-arrhythmic drugs are what type of channel blockers?

a)

Na+ Channel Blockers

b)

K+ Channel Blockers

c)

Ca++ Channel Blockers

d)

β\beta Blockers

2.

MOA for Class I antiarrhythmics?

a)

Inhibit Ventricular Contractility and Slow conduction velocity

b)

Increase Ventricular Contractility and Speed up conduction velocity

3.

What is the Class Ia antiarrhythmic final effect?

a)

Increased QRS, QT

b)

Action potential and Ventricular Refractory Period are Prolonged

c)

Decreased QRS, QT

d)

Action potential and ventricular refractory period are shortened

4.

Class Ia Mnemonic?

a)

Para Qada Desorden

b)

Procainamide, Quinidine, Disopyramide

5.

Clinical use of Ia Antiarrhythmics?

a)

Broad Spectrum

b)

Works on supraventricular and ventricular disorders

c)

Narrow Spectrum

d)

Strictly used for ventricular disorders

6.

When is Procainamide used?

a)

Recent A-Fib Onset

b)

Afib Maintenence

c)

Myocardial Infarction

d)

Cardiac Arrest

7.

When is quinidine used?

a)

Maintenence of NSR post A-Fib Conversion

b)

Converting Afib to NSR

8.

Effects of Class Ia antiarrhythmics on warfarin and digoxin?

a)

Increased Effect

b)

Decreased Effect

c)

No Effect

9.

What can cause increased effect of class Ia drugs?

a)

Anything that prevents their excretion

b)

XX

10.

What should be checked every 2 weeks when using procainamide?

a)

CBC

b)

Signs of SLE-Like Reaction

11.

Drawbacks to Class Ia antiarrhythmics?

Mad as a Hatter

Hot as a Hare

Blind as a Bat

Red as a Beet

Dry as a Bone

a)

Proarrhythmic

b)

Seizures can occur with Procainamide

c)

Quinidine = BAD GI Side Efffects

d)

Disopyramide = Ach SE, CI in Glaucoma