Key result
The difference in local VA interval (DVA) during ventricular entrainment pacing and tachycardia was significantly longer in patients with AVNRT (120 ± 20 ms) compared to those with ORT (5.7 ± 9 ms, P < 0.001).
Why the study?
Does the DVA measurement differentiate atrioventricular node reentrant tachycardia from orthodromic reciprocating tachycardia in patients undergoing electrophysiological study?
Population
Patients with atrioventricular node reentry tachycardia or orthodromic reciprocating tachycardia undergoing…
Comparison
Measurement of DVA. vs Comparison between patients with AVNRT and…
Design
Cohort
Authors
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May support DVA as a potential EP discriminator; leaves open prospective validation before clinical adoption.
Observational (n=168)
No
Does the DVA measurement differentiate atrioventricular node reentrant tachycardia from orthodromic reciprocating tachycardia in patients undergoing electrophysiological study?
Absolute Event Rate: 120% vs 5.7%
p-value: p=<0.001
The DVA measurement provides a rapid and useful electrophysiological criterion to distinguish AVNRT (DVA > 48 ms) from ORT (DVA < 20 ms).
He et al. (2017) conducted an observational in Paroxysmal regular narrow QRS tachycardia (n=168). Difference in local VA interval (DVA) during ventricular entrainment pacing and tachycardia vs. ORT vs AVNRT was evaluated on Difference in local VA interval (DVA) (p=<0.001). The difference in local VA interval (DVA) during ventricular entrainment pacing and tachycardia was significantly longer in patients with AVNRT (120 ± 20 ms) compared to those with ORT (5.7 ± 9 ms, P < 0.001).
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