Verapamil Hydrocloride (Isoptin®, Calan®) Flashcards
0
Q
Verapamil - Actions
A
- Slows conduction and prolongs refractoriness in AV node
- Coronary & peripheral vasodilation
- Decreased contractility
- Decreases myocardial oxygen consumption
1
Q
Verapamil - Class
A
Calcium channel blocker
2
Q
Verapamil - Indications
A
Uncompensated SVT/A-fib/A-flutter
3
Q
Verapamil - Dosage/Route
A
- 5 mg slow IVP
* May repeat to maximum 15 mg in 30 minutes
4
Q
Verapamil - Side Effects
A
- HoTN (transient)
- Asytole
- Bradycardias, including heart blocks
- May increase ventricular rate in some cases of bypass tract
5
Q
Verapamil - Contraindications
A
- Congestive heart failure
- WPW syndrome
- Heart blocks
- Wide complex tachycardias
6
Q
Verapamil - Special Information
A
- Prior to admin, consider pretreatment with 5 ml Calcium Chloride 10% to prevent HoTN
- Adenosine is first med of choice for SVT per AHA ACLS guidelines
- Can slow rate in rapid A-fib
- Elderly pts on calcium channel blockers may require lower dosage
- Discontinue admin at first sign of slowing heart rate
- Can induce VF resistant to treatment in the pt with WPW syndrome. The ECG may show WPW as a shortened PRI (0.12 sec) - consider lidocaine to treat these pts
- Admin of verapamil to pt with wide complex tachycardia can be a LETHAL ERROR!!!
- Monitor pulse rate,ECG, and BP closely
7
Q
Verapamil - Pediatric Note
A
Not indicated
