SVT Flashcards
1
Q
Treatment of SVT?
A
manoeuvres that enhance vagal tone:
- the Valsalva manoeuvre
- carotid sinus massage
If these are ineffective, monitor blood pressure carefully and use:
- adenosine 6 mg IV bolus, over 5 to 10 seconds. If this is unsuccessful, then 2 minutes later give a second bolus of 12 mg. If this is ineffective but well tolerated, a further dose of 18 mg may be given
- verapamil 1 mg/minute IV, up to 15 mg.
2
Q
Medications for prophylaxis of SVT?
A
- atenolol
- metoprolol
- sotalol
- flecainide
- verapamil
if all of these drugs fail use amiodarone
Patients who experience only occasional episodes of PSVT generally do not require prophylaxis. Frequent episodes should prompt referral to a cardiac electrophysiologist for consideration of electrophysiological study and radiofrequency ablation
3
Q
What are the types of SVT?
A
ATRIAL
REGULAR
- Sinus tachycardia
- Atrial tachycardia
- Atrial flutter
- Inappropriate sinus tachycardia
- Sinus node re-entrant tachycardia
IRREGULAR
- Atrial fibrillation
- Atrial flutter with variable block
- Multifocal atrial tachycardia
ATRIOVENTRICULAR
- Atrioventricular re-entry tachycardia (AVRT)
- AV nodal re-entry tachycardia (AVNRT)
- Automatic junctional tachycardia
