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| Clinical value of “ventricle-atrium fusion during atrial S1S1 stimulating” in patients with atrioventricular nodal reentrant tachycardia |
| FANG Yuqiang, WEN Chunlan, YANG Lili, YANG Li, ZOU Xue, LIU Yukai |
| Cardiovascular Department, Army Medical Center, Chongqing 400042, China |
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Abstract Objective To explore the clinical significance of “ventricle-atrium(VA) fusion during atrial S1S1 stimulating” in patients with atrioventricular nodal reentrant tachycardia(AVNRT). Methods The electrophysiological data of 2 057 patients were analyzed, among whom 896 patients were diagnosed with ANVRT (including 874 cases with a definite history of tachycardia), and performed improvement of slow path. We analyzed the electrophysiological characteristics of all the patients, especially the clinical features of “S2R jump during atrial S1S2 stimulating” and “VA fusion during atrial S1S1 stimulating”, and their values for predicting the onset and postoperative recurrence of tachycardia. Results The detection rate of “VA fusion during atrial S1S1 stimulating” and “S2R jump during atrial S1S2 stimulating” are 92.9% and 79.8%, respectively (separately 95.3% and 79.3% in those with definite tachycardia); the former is significantly higher than the latter (P＜0.05). In the diagnosis of AVNRT, the positive and negative predictive value are separately 96.9% and 84.5%, the specificity and sensitivity are separately 97.8% and 79.3%, and the positive and negative likelihood ratio are separately 36.400 and 0.211. The above indexes of “VA fusion during atrial S1S1 stimulating” are 100.0%, 96.0%, 100.0%, 95.3%, 941.600, 0.047, respectively. After the ablation for AVNRT, the phenomenon of “S2R jump during atrial S1S2 stimulating” still exists in 10.9%(95/874) of patients, significantly higher than the proportion of “VA fusion during atrial S1S1 stimulating” (1.3%, 11/874, P=0.017). “VA fusion during atrial S1S1 stimulating” is found in all the 9 recurrent patients, among whom only 6 (66.7%) patients are detected “S2R jump during atrial S1S2 stimulating”. Conclusion “VA fusion during atrial S1S1 stimulating” is superior to “S2R jump during atrial S1S2 stimulating” in predicting the onset and postoperative recurrence of tachycardia in patients with AVNRT, which makes the former more valuable in practice as an electrophysiological characteristic.
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| [1] |
. [J]. JOURNAL OF PRACTICAL ELECTROCARDIOLOGY, 2023, 32(1): 67-71. |
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