Key result
Differential entrainment from the right ventricular apex versus base yielded an [SA-VA] difference of -9.4 ± 6.6 ms in AVNRT and 10 ± 11.3 ms in AVRT (P<0.001), distinguishing the arrhythmias.
Why the study?
Does the difference in entrainment response from the RV apex versus base distinguish AVNRT from AVRT in patients with SVT?
Population
59 consecutive patients referred for ablation of supraventricular tachycardia, including 36 with AVNRT and…
Design
Cohort
Authors
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May aid SVT differentiation via differential RV entrainment; supports diagnostic utility but leaves open prospective validation.
Observational (n=59)
Does the difference in entrainment response from the RV apex versus base distinguish AVNRT from AVRT in patients with SVT?
Absolute Event Rate: -9.4% vs 10%
p-value: p=<0.001
The difference in SA-VA intervals during entrainment from the RV apex versus the RV base accurately distinguishes AVNRT from AVRT with septal accessory pathways.
Khan et al. (2010) conducted an observational in Supraventricular tachycardia (AVNRT and AVRT) (n=59). Differential entrainment from right ventricular apex and base vs. AVNRT vs AVRT was evaluated on [SA-VA]apex - [SA-VA]base interval difference (p=<0.001). Differential entrainment from the right ventricular apex versus base yielded an [SA-VA] difference of -9.4 ± 6.6 ms in AVNRT and 10 ± 11.3 ms in AVRT (P<0.001), distinguishing the arrhythmias.
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