CardiologyEmergency Medicine
Paroxysmal SVT (AVNRT / AVRT)
Acute termination with vagal manoeuvres + adenosine, identification of AVNRT vs AVRT, definitive ablation pathway.
Source: ESC 2019 SVT; AHA/ACC/HRS 2015
Step 1 of ~6
info
Confirm Narrow-Complex Tachycardia
Sudden-onset palpitations, regular narrow-complex tachycardia (HR usually 150–220). Rule out adverse features (shock, syncope, ischaemia, severe HF) — see peri-arrest tachy pathway. 12-lead ECG ideally captured during episode.
Related
Curated clinical cross-links plus same-class fallbacks.
Drugs
- Adenosine (IV — SVT Termination) · Antiarrhythmic (Adenosine Receptor Agonist)
- Dipyridamole · Antiplatelet (phosphodiesterase inhibitor + adenosine reuptake inhibitor)
- Dipyridamole (Secondary Stroke Prevention) · Antiplatelet — Phosphodiesterase Inhibitor / Adenosine Uptake Inhibitor
- Neostigmine · Anticholinesterase (Reversal Agent)
- Prilocaine · Local Anaesthetic (Amide)
- Methylene Blue · Guanylate Cyclase / Nitric Oxide Pathway Inhibitor
Pathways
- Acute Heart Failure · ESC 2021 Heart Failure Guidelines; NICE NG106
- NSTEMI / Unstable Angina · ESC 2020 NSTEMI Guidelines; NICE NG185
- New-Onset Atrial Fibrillation · ESC 2020 AF Guidelines; NICE NG196
- Hypertensive Emergency · ESC/ESH 2018 Hypertension Guidelines; NICE NG136
- Bradycardia Management · Resuscitation Council UK ABCDE; ESC 2021 Pacing Guidelines
- Ventricular Tachycardia / Fibrillation · Resuscitation Council UK ACLS; ESC 2022 Ventricular Arrhythmia Guidelines
Decision support only. Always apply local guidelines and clinical judgement.