Abstract：ObjectiveTo discuss the value of the difference of pacing entrained stimulusauricle(SA) interval and tachycardia ventriculoatrial(VA) interval, that is, SAVA interval, on differentiating between atrioventricular reentrant tachycardia(AVRT) and atrioventricular nodal reentrant tachycardia(AVNRT), during the tachycardia entrainment through trains of the basal segment of right ventricle. MethodsWe selected 67 patients with tachycardia and narrow QRS without obvious preexcitation wave on surface ECG. Tachycardia entrainment was attempted through trains of the basal segment of right ventricle. The electrophysiological parameters including SAVA interval and the corrected regression cycle (the difference of corrected postpacing interval and tachycardia circle length) after the entrainment were measured, and their efficacy of distinguishing between different mechanisms of paroxysmal supraventricular tachycardia was compared. ResultsThere were 19 patients with accessory pathway mediated AVRT, using freewall or septal accessory pathways (n=13, 6), respectively. There were 48 AVNRT patients in whom 35 were typical and 13 were atypical. The sensitivity, specificity, and positive and negative predictive values of the corrected regression cycle >95 ms were separately 90%, 90%, 96% and 78% in differentiating between AVNRT and AVRT; however, these values were separately 94%, 84%, 94% and 85% for SAVA interval＞80 ms. And in the differential diagnosis of septal accessory pathway mediated AVRT and atypical AVNRT, the sensitivity and specificity of SAVA interval≤50 ms could both reach as high as 100%. ConclusionSAVA interval serves as an easy, simple and effective method for differentiating AVRT from AVNRT during the entrainmentthrough trains of the basal segment of right ventricle.
朱春瑜, 林春艺, 叶子聪, 郑桂安, 林珊婴, 翁兰. SA-VA间期对阵发性室上性心动过速的鉴别价值[J]. 实用心电学杂志, 2019, 28(1): 27-34.
ZHU Chun-Yu, LIN Chun-Yi, YE Zi-Cong, ZHENG Gui-An, LIN Shan-Ying, WENG Lan. The value of SA-VA interval in making differential diagnosis of paroxysmal supraventricular tachycardia. JOURNAL OF PRACTICAL ELECTROCARDIOLOGY, 2019, 28(1): 27-34.
2019, Vol. 28 
