Antiarrhythmic drugs Flashcards
Which antiarrhythmic class blocks calcium channels?
class IV
Which class of antiarrhythmics blocks beta receptors?
class II
Which class of antiarrhythmics prolongs APD?
class III
Name a class 1A drug?
procainamide
Which drugs have class 1A effects in diseased myocardium?
lidocaine mexiletine (class 1B in normal myocardium)
What are the member of the class that most slows AV conduction?
flecainamide
propafenone
Which class II antiarrhythmic is not cardioselective?
propranolol
What is the DOC for acute suppression of V arrhythmias?
amiodarone (class III)
What drug has class III and class I actions?
dronedarone
Which class IV drug cannot be used with digoxin?
verapamil
Which drugs are used to treat bradycardia?
isopreterenol
atropine
Which antiarrhythmic causes the greatest increase in QRS duration?
flecainamide
Which drugs cause the greatest increase in QT interval?
procainamide
amiodarone
Which antiarrhythmic drug can cause hypersensitivity
lidocaine
Which antiarrhythmic can cause lupus like syndrome?
procainamide
Which antiarrhythmic class blocks sodium channels?
Class 1
Which antiarrhythmic is similar to lidocaine but orally available?
mexiletine
Which antiarrhythmic should be avoided in patients with organic heart disease?
flecainide
propafenone similar
Which cardioselective beta blocker should nly be used short term?
esmolol
Which class of antiarrhythmics is used for supraventricular arrhythmias?
beta blockers
Which antiarrhythmic can cause pulmonary fibrosis?
amiodarone
Which antiarrhythmic increases mortality risk in CHF?
dronedarone
Which antiarrhythmics can cause torsades de pointes?
procainamide all class IIIs (amiodarone, dronedarone, sotolol, ibutilide, dofetilide)
