Least likely to cause cardiac failure:

Major adverse effects of verapamil (Isoptin, Calan) or diltiazem (Cardiazem) IV administration:

Same antiarrhythmic classification: disopyramide (Norpace) and

Most likely effective in treating supraventricular tachyarrhythmias:

A reversible lupus erythematous-like syndrome is most likely associated with this antiarrhythmic drug.

Antiarrhythmic drug most likely to cause seizures (at high concentrations) by direct CNS actions:

Antiarrhythmic drug, acting at potassium channels:

Cinchonism: adverse effect associated with this antiarrhythmic drug.

Antiarrhythmic drug, administered IV, typically used to suppress ventricular arrhythmias associated with acute myocardial infarction:

Despite being a myocardial depressant, this antiarrhythmic drug's anticholinergic properties facilitate AV nodal transmission:

Changes in cardiac automaticity is most directly associated with changes in which slope of the myocardial action potential?

Contraindicated in asthmatic patients, this antiarrhythmic drug blocks beta-1 receptors.

Class II antiarrhythmic drug

Muscarinic receptor antagonist, this antiarrhythmic drug may be effective in managing bradycardia.

Calcium channel blocker -- effective in treating supraventricular arrhythmias:

Class III antiarrhythmic drug may be effective in treating ventricular arrhythmias; prolongs phase 3 (repolarization); potassium channel blocker

Naturally occurring metabolites, given by IV administration, this antiarrhythmic agent slows conduction through the AV node

Digoxin (Lanoxin, Lanoxicaps) is useful in treating high ventricular rates in patients with atrial fibrillation because:

Antiarrhythmic drug likely to increase heart rate:

Always administered by IV because of significant first-pass effect, this anti-rhythmic drug suppresses ventricular arrhythmias associated with acute myocardial infarction; CNS side effects are prominent in overdosage.