Verapamil (Isoptin) (Calan)

Used to treat narrow-complex PSVT; Second-line drug to Adenosine

A calcium channel blocker; Slows Av conduction and prolongs refractories in the AV node; Is effective in treating SVT; Decreases the rapid ventricular response in Atrial Tachydysrhythmias such as A-Fib and A-Flutter; Decreases myocardial oxygen demand and causes coronary and peripheral vasodilation

PSVT refractory to Adenosine; Atrial Flutter with rapid ventricular response; Atrial Fibrillation with rapid ventricular response

Severe hypotension or cardiogenic shock; ventricular tachycardia; Wolff-Parkinson-White (WPW) Syndrome; a disorder of the heart where early depolarization of the heart muscle occurs

can cause systemic hypotension; monitor BP continuously

• For PSVT, 2.5-5mg IV over 2 minutes
• A second dose of 5-10mg after 10-15 minutes
• Total dose should not exceed 20mg in 30 minutes
• No pediatric Dosing