Key result
Single atrial extrastimulation demonstrated that the excitable gap of slow-fast AVNRT is relatively wide, measuring 121±56 ms and 123±47 ms from the slow and fast pathway areas, respectively.
Why the study?
What are the electrophysiological manifestations and duration of the excitable gap in patients with slow-fast AVNRT when assessed by single atrial extrastimulation near the AV junction?
Population
16 patients with inducible slow-fast AVNRT
Design
Case_series
Authors
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Case report data do not change AVNRT practice; supports reentry with wide gap and extends remote-site observations but remains hypothesis-generating.
Observational (n=16)
What are the electrophysiological manifestations and duration of the excitable gap in patients with slow-fast AVNRT when assessed by single atrial extrastimulation near the AV junction?
The excitable gap of slow-fast AVNRT is relatively wide, supporting the concept that AVNRT involves a reentrant mechanism similar to AV reciprocating tachycardia with an accessory connection.
Lai et al. (1995) conducted an observational in Slow-fast AV nodal reentrant tachycardia (AVNRT) (n=16). Single atrial extrastimulation was evaluated on Duration of the excitable gap (EG) of AVNRT. Single atrial extrastimulation demonstrated that the excitable gap of slow-fast AVNRT is relatively wide, measuring 121±56 ms and 123±47 ms from the slow and fast pathway areas, respectively.
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