ORGANOTROPIC AGENTS - Antiarrhythmic agents

Question 1

This drug is a Class IA antiarrhythmic drug

Answer 1

Quinidine

Question 2

This drug is a Class IC antiarrhythmic drug

Answer 2

• Lidocaine

- Flecainide

Question 3

This drug is a Class II antiarrhythmic drug

Answer 3

Propranolol

Question 4

This drug is a Class III antiarrhythmic drug

Answer 4

Sotalol

Question 5

This drug prolongs repolarization

Answer 5

Sotalol

Question 6

This drug is a Class IV antiarrhythmic drug

Answer 6

Verapamil

Question 7

This drug is used in treating supraventricular tachycardias

Answer 7

Digoxin

Question 8

This drug is associated with Torsades de pointes

Answer 8

Sotalol

Question 9

This drug has beta-adrenergic blocking activity

Answer 9

Sotalol

Question 10

This drug is useful in terminating atrial but not ventricular tachycardias

Answer 10

Verapamil

Question 11

This is a drug of choice for acute treatment of ventricular tachycardias

Answer 11

Lidocaine

Question 12

True or False. The calcium channel blockers have direct negative inotropic effects because they reduce the inward movement of calcium during the action potential.

Answer 12

TRUE

Question 13

True or False. Common unwanted effects of the dihydropyridines are due to vasodilation.

Answer 13

TRUE

Question 14

True or False. Verapamil is a more potent vasodilator than nifedipine.

Answer 14

FALSE

Question 15

This drug is contraindicated in patients with moderate to severe heart failure

Answer 15

Verapamil

Question 16

This drug is used intravenously to terminate supraventricular tachycardias

Answer 16

Verapamil

Question 17

This drug has a little or no direct effect on chronotropy and dromotropy at normal doses

Answer 17

Nifedipine

Question 18

True or False. Verapamil has a significant effect on automaticity in the SA node.

Answer 18

TRUE

Question 19

This drug acts by inhibiting slow calcium channels in the SA and AV nodes

Answer 19

Diltiazem

Question 20

True or False about verapamil. It blocks L-type calcium channels

Answer 20

TRUE

Question 21

True or False about verapamil. It increases heart rate

Answer 21

FALSE

Question 22

True or False about verapamil. It relaxes coronary artery smooth muscle

Answer 22

TRUE

Question 23

True or False about verapamil. It depresses cardiac contractility

Answer 23

TRUE

Question 24

The following calcium channel blockers are useful in the treatment of cardiac arrhythmias

Answer 24

• Bepridil
• Diltiazem
• Verapamil

Question 25

The following calcium channel blockers are not useful in the treatment of cardiac arrhythmias

Answer 25

Nifedipine

Question 26

The following are common adverse effects of calcium channel blockers

Answer 26

• Dizziness
• Headache
• Flushing

Question 27

The following are not common adverse effects of calcium channel blockers

Answer 27

Skeletal muscle weakness

Question 28

The adverse reactions characteristic for lidocaine

Answer 28

Hypotension, paresthesias, convulsions