Table 4 - Anti-Arrhythmics

Question 1

Naturally occurring nucleoside

Answer 1

Adenosine

Question 2

Decreases myocardial excitability and conduction velocity; may depress contractility (by increasing electrical threshold)

Answer 2

Procainamide

Question 3

For life-threatening ventricular arrhythmias

Answer 3

Procainamide

Question 4

Electrolyte

Answer 4

MgSO4 (IV)

Question 6

Inhibits adrenergic alpha and beta stimulation affecting Na, K, and Ca channels; prolongs AP and refractory period; decreases AV conduction and sinus node function

Answer 6

Amiodarone

Question 7

Class 3 repolarization delay via K channels

Answer 7

Amiodarone

Question 8

Slows conduction in cardiac tissue (by altering transport of ions across cell membranes), causes slightly prolonged refractory periods, increases threshold

Answer 8

Flecainide

Question 9

Adrenergic B1 and B2 receptor inhibitor; reduces O2 demand, HR, contractility, BP

Answer 9

Propranolol

Question 10

Class 1C Na channel blocker

Answer 10

Flecainide

Question 11

Class 4 calcium channel: CCB NDHP

Answer 11

Verapamil, Cardizem

Question 12

Dilates coronary arteries and decreases O2 demands

Answer 12

Verapamil, Cardizem

Question 13

PSVT: Slows conduction time through AV node by interrupting reentry pathways in AV node and restoring NSR

Stress testing: Causes coronary vasodilation and increases blood flow in normal coronary arteries with little to no increase in stenotic coronary arteries

Answer 13

Adenosine

Question 14

Inhibits Na/K pump causing increased Ca influx causing increased contractility; decreases ventricular rate (by suppressing AV node)

Answer 14

Digoxin

Question 15

Selective B1 adrenergic receptor inhibitor

Answer 15

Metoprolol and Atenolol

Question 17

Class 1A Na channel blocker

Answer 17

Procainamide

Question 17

Class 2 beta blockers - nonselective

Answer 17

Propranolol

Question 18

ONLY life-threatening recurrent VF, unstable VT, off-label for A-fib, PSVT, adjunct to ICD to suppress ventricular tachyarrhythmias in HF

Answer 18

Amiodarone

Question 19

Digitalis-induced arrhythmias with low Mg, low Mg-induced arrhythmias (VF, VT)

OFF LABEL: Torsades de pointes, severe asthma in children

Answer 19

Mg SO4 (IV)

Question 20

Class 1B Na channel blocker

Answer 20

Lidocaine

Question 21

Suppressing existing ventricular arrhythmias

Answer 21

Lidocaine

Question 22

Prevention of ventricular arrhythmias; PSVT; Paroxysmal Afib/Aflutter

Answer 22

Flecainide

Question 23

PSVT, Pharmacologic stress testing

Answer 23

Adenosine

Question 24

Mild to moderate HF, Afib

Answer 24

Digoxin

Question 25

Blocks initiation and conduction of nerve impulses (by decrease permeability of Na), suppresses automaticity of conduction tissue (by increasing threshold during diastole)

Answer 25

Lidocaine

Question 26

Class 2 Beta blockers: Cardioselective B1

Answer 26

Metoprolol tartrate/succinate and atenolol

Question 26

Cardiac glycoside

Answer 26

Digoxin