Monday, November 5, 2012

Treating SVT

SVT: Supraventricular Tachycardia. SVT is when there are no P waves, no PRI, QRS is less than 0.12 seconds. SVT has a heart rate of greater than 150.

Causes of SVT: Underlying heart disease, stress, overexertion, smoking, ingestion of caffeine, atherosclerotic cardiovascular disease, rheumatic heart disease

In order to treat a patient who is suffering from SVT, you would give the patient oxygen via NC @ 2-4 LPM, gain IV access to the most central site, preferbly 18 gage to either the right or left AC, and push Adenosine. In some cases, you may have to synchronize cardioversion on the patient (which we will cover in a later post).


Adenosine Portfolio

Name: Adenosine (Adenocard)
Class: Antiarrhythmic
MOA: Works by interrupting re-entry pathways through the AV node. This will slow the AV
                 conduction causing the refractory period to be prolong.
Indications: SVT
Contraindication: Allergy, Use caution in patient's with WPW
Side Effects: Bradycardia, Asystole, Facial Flushing, CP, Light-headedness
Onset/Duration: Immediate / Around 12 Seconds
Route: IV
       - ADULT: 6mg, if ineffective after 2 minutes give, 12 mg
       - PEDS: 0.1 mg/kg (max 6mg), if ineffective then 0.2 mg/kg (max 12mg)
Supplied: 6mg / 1mL Ampules
Contraindications: Elevate arm, with rapid IVP of 20mL NS

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