ECG library
Supraventricular tachycardia (AVNRT)
coreA 29-year-old with abrupt-onset palpitations and lightheadedness.
25 mm/s · 10 mm/mV · synthetic tracing
100%
Calipers:2000 ms50.0 small boxes30 bpm if R-RDrag the orange markers. One small box = 40 ms.
Key findings
- Regular, narrow, fast
- Abrupt onset and offset
- Hidden or retrograde P waves
Learning points
- Abruptness separates SVT from sinus tachycardia; sinus speeds up and slows down gradually.
- Vagal maneuvers and adenosine are both diagnosis and treatment at the AV node.
Connected