Table 4 - Anti-Arrhythmics Flashcards Preview

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Flashcards in Table 4 - Anti-Arrhythmics Deck (26)
1

Naturally occurring nucleoside

Adenosine

2

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

Procainamide

3

For *life-threatening* ventricular arrhythmias

Procainamide

4

Electrolyte

MgSO4 (IV)

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

Amiodarone

7

Class 3 repolarization delay via K channels

Amiodarone

8

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

Flecainide

9

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

Propranolol

10

Class 1C Na channel blocker

Flecainide

11

Class 4 calcium channel: CCB NDHP

Verapamil, Cardizem

12

Dilates coronary arteries and decreases O2 demands

Verapamil, Cardizem

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

Adenosine

14

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

Digoxin

15

Selective B1 adrenergic receptor inhibitor

Metoprolol and Atenolol

17

Class 1A Na channel blocker

Procainamide

17

Class 2 beta blockers - nonselective

Propranolol

18

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

Amiodarone

19

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

OFF LABEL: Torsades de pointes, severe asthma in children

Mg SO4 (IV)

20

Class 1B Na channel blocker

Lidocaine

21

Suppressing *existing* ventricular arrhythmias

Lidocaine

22

*Prevention* of ventricular arrhythmias; PSVT; Paroxysmal Afib/Aflutter

Flecainide

23

PSVT, Pharmacologic stress testing

Adenosine

24

Mild to moderate HF, Afib

Digoxin

25

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

Lidocaine

26

Class 2 Beta blockers: Cardioselective B1

Metoprolol tartrate/succinate and atenolol

26

Cardiac glycoside

Digoxin