Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
18 Cards in this Set
- Front
- Back
|
DOC for Supraventricular Tachycardia? (steady)
|
propranolol and Na+ channel blocker or K+ channel blocker
|
|
|
DOC for Paroxysmal Supraventricular Tachycardia? (PSVT)
|
Verapamil
|
|
|
DOC for Ventricular Fibrillation?
|
IV lidocaine (into the heart!) or defibrillator STAT or your pt's gonna croak
Epinephrine |
|
|
DOC for AV Block?
|
goal: reduce parasympathetic tone.
--> use IV Atropine |
|
|
DOC for Sinus Bradycardia?
|
goal: reduce parasympathetic tone
--> IV Atropine (block vagal cardiac tone) Pacemaker Isoproterenol in emergencies |
|
|
DOC for Sinus Tachycardia?
|
adenosine, Beta-blockers
goal: reduce sympathetic tone |
|
|
DOC for Atrial Tachycardia?
|
beta-blocker & Na+ chl. blocker
beta-blocker & K+ chl blocker verapamil & digitalis |
|
|
DOC for Ventricular Tachycardia?
|
Class I drugs: procainamide, quinidine, flecainide--increase ERP
Amiodarone, Dronaderone Beta Blockers (prevent xs sympathetic stim. of ventricles) Implanted Defibrillator |
|
|
MOA of adenosine?
|
Causes temporary heart block at AV node --> good for PSVT
|
|
|
K+ Channel Blockers
End effect? Examples? |
Delay repolarization, Prolong ERP
Dofetilide, Ibutilide |
|
|
Class IA Na+ Channel blockers
End effect? Examples? |
decrease Vmax, increase ERP and AP threshold
procainamide, quinidine (also antimuscarinic and K+ channel blockade) |
|
|
Class IB Na+ Channel blockers
End effect? Examples? |
decreases automaticity in His-Purkinje Fibers. decrease ERP and AP duration.
Lidocaine, Mexitetine, Tocainide |
|
|
Class IC Na+ Channel blockers
End effect? Examples? |
lesser increase in AP duration and ERP than class IA; greater reduction in Vmax
Flecainide (also propafenone, moricizine) |
|
|
Amiodarone, Dronaderone
MOA? End effect? |
high affinity Na+ and K+ Channel blockade
low affinity Ca+ channel and Beta blockade Amiodarone's Iodine --> pulmonary fibrosis, DDI's, etc. :( |
|
|
Sotalol
MOA? End effect? |
combo beta blocker and K+ blocker. Prolongs APD and ERP, Decreases SA nodal automaticity and conduction
l-sotalol is better B-blocker low dose --> B-blockade high dose --> B-blockade and K+ blockade |
|
|
Class II antiarrhythmic drugs
Examples? MOA? End effect? |
Propranolol, Metoprolol, Esmolol
Beta-adrenergic Receptor blockade Decreased sympathetic tone --> reduce automaticity, etc. |
|
|
Adenosine
MOA? End Effect? |
Activates Kir in atria --> hyperpolarization of cell, can't reach threshold
Prevents sympathetic Ca++ chl opening --> good for preventing AV nodal re-entry |
|
|
Class IV Antiarrhythmic drugs
MOA? End effect? Examples? |
block phase 2 Ca++ current --> lengthen duration of AP.
decrease SA node automaticity only phenylalkylamines (verapamil) and benzothiazepines (diltiazem). |
