CV Drugs - Arrythmia Flashcards
main pacemaker of the heart
sinoatrial node
p wave
atrial contraction
qrs wave
ventricular contraction
t wave
ventricular relaxation
DOC for digoxin-induced arrhythmia
lidocaine, phenytoin
DOC for supraventricular tachycardia (SVT)
adenosine
DOC for ventricular tachycardia (VT)
amiodarone
alt: lidocaine/shock
DOC for ventricular fibrillation (VF)
amiodarone
alt: shock
DOC for chronic atrial fibrillation (rate control)
digoxin
DOC for acute atrial fibrillation (rhythm control)
Class III, Ia, Ic
quinidine
Class IA
Na channel blocker (Phase 0)
s/e: cinchonism
procainamide
Class IA
Na channel blocker (Phase 0)
s/e:
lupus like effect (same as hydralazine & isoniazid)
disopyramide
Class IA
Na channel blocker (Phase 0)
phenytoin
Class IB
Na channel blocker (Phase 0)
lidocaine
Class IB
Na channel blocker (Phase 0)
mexiletine
Class IB
Na channel blocker (Phase 0)
tocainide
Class IB
Na channel blocker (Phase 0)
flecainide
Class IC
Na channel blocker (Phase 0)
propafenone
Class IC
Na channel blocker (Phase 0)
moricizine
Class IC
Na channel blocker (Phase 0)
propranolol
Class II
beta blocker (damage control only)
dec HR
esmolol
Class II
beta blocker (damage control only)
dec HR
acebutalol
Class II
beta blocker (damage control only)
dec HR
bretylium
Class III
K channel blocker (prolong refractory period)
amiodarone
Class III
K channel blocker (prolong refractory period)
s/e: hepatotoxic, thyroid probs, corneal deposits
sotalol
non selective Bblocker
prolongs phase 3 action potential
Class III
K channel blocker (prolong refractory period)
dofetilide
Class III
K channel blocker (prolong refractory period)
verapamil
Class IV
Ca channel blocker (dec HR)
diltiazem
Class IV
Ca channel blocker (dec HR)
restore rhythm
class I and III
dec HR
class II and IV
adenosine
slow down firing of SA node
other drugs
atropine
other drugs
digoxin
other drugs
magnesium sulfate
s/e: proarrhythmia
other drugs
DOC for sustained ventricular arrhythmia with acute MI
lidocaine