Atrial
Supraventricular Tachycardia
Narrow-complex regular tachycardia originating above the ventricles.
LEAD II · 25 mm/sSVT
Characteristics
- Rate
- 150–220 bpm
- Rhythm
- Regular
- P wave
- Absent or buried in T
- QRS
- Narrow
Common causes
- AV nodal re-entry (AVNRT)
- Accessory pathway (AVRT / WPW)
ACLS treatment
- 1Stable: vagal maneuvers → adenosine 6 mg rapid IV push, then 12 mg if needed.
- 2Unstable: synchronized cardioversion (50–100 J biphasic).