Class 1 Antiarrhythmic

Class IA

Class I Antiarrythmic

Class 1A

depresses SA and AV nodes

Class I Antiarrhythmia

Class IA

inhibits muscarinic receptors

atropine-like effects

Class I Antiarrhythmic

Class IB

Low toxicity and high degree of effectiveness in arrhythmias associated with MI

Class I Antiarrythmic

Class IB

oral version of lidocaine

Class I Antiarrythmic

Class IC

 treat a.fib

suppressing PVCs

Class I Antiarrythmic

Class IC

treat a.fib

Class II Antiarrhythmic - Beta Blockers

Class II Antiarrhythmic - Beta Blockers

Selective B1

IV use only - Ultra short acting (short half life)

severe arrhythmia

Class III antiarrhythmic 

blocks sodium and potassium channels

Class III Antiarrhythmic

Class III Antiarrhythmic

non selective beta antagonist

blocks potassium channels

Class III Antiarrhythmic

Blocks slow Na channels

Class III Antiarrhythmic

Selective blocker of potassium channel

Class IV Antiarrhythmic

Calcium Channel Blocker

Class III Antiarrythmic

Calcium Channel Blocker

Class IV Antiarrhythmic

Calcium channel blocker

also inhibits fast Na channels

Adenosine (Adenocard)

No Category

Inhibit calcium current by decreasing cAMP

Mechanims not well understood

works with low and normal serum magnesium levels

used with dig-induced arrhythmias, torsades, and acute MI