Verapamil

Question 1

Verapamil Class

Answer 1

Calcium channel blocker

Question 2

Verapamil Mechanism of Action

Answer 2

• Slows AV node conduction
• Shortens the refractory period of accessory pathways
• Acts as a negative inotrope and vasodilator

Question 3

Verapamil Indications

Answer 3

• Stable narrow QRS tachycardia if the rhythm persists despite vagal maneuvers or adenosine or if the tachycardia is recurrent
• To control ventricular rate in patients with AD or atrial flutter without preexcitation

Question 4

Verapamil Contraindications

Answer 4

• Wolf Parkinson White syndrome, Lown-Ganong Levine syndrome
• Hypotension
• Cardiogenic shock

Question 5

Verapamil Dosage and Administration

Answer 5

• 2.5 mg - 5 mg IV bolus over 2 min (3 min in older patients)
• Repeat dose of 5 - 10 mg may be given every 15 - 30 min to a max dose of 20 mg