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Atrioventricular Nodal Reentry
Aka: Atrioventricular Nodal Reentry, AVNRT
- See Also
- Supraventricular Tachycardia
- Definition
- Form of Supraventricular Tachycardia (60% of cases) in which reentry occurs with the AV Node
- Epidemiology
- Most common in young women
- Typically there is no underlying heart disease
- Findings: General
- Heart Rate typically 160 to 190 (up to 260) with no P Waves seen
- Types: Typical (slow/fast): 90% of AVNRT
- Course
- Starts with PAC passed down slow accesory path
- Signal travels retrograde up fast path
- Signal cycles back down slow accesory pathway
- EKG findings
- PR interval > RP Interval
- Negative P Waves in III and avF
- Types: Atypical (fast/slow): 10% of AVNRT
- Course: Reverse of typical pathway
- EKG findings
- PR interval < RP Interval
- Pseudo-S Wave in leads I, II, aVF
- References
- Colucci (2010) Am Fam Physician 82(8): 942-52
- Delacretaz (2006) N Engl J Med 354(10): 1039-51
- Kumar (2006) Cardiol Clin 24(3): 427-37