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The predictive value of intra‐left atrial mechanical delay for 1‐year recurrence of atrial fibrillation after catheter ablation: A clinical follow‐up study using dual Doppler echocardiography
Author(s) -
Zhou Yanxiang,
Chen Jinling,
Hu Bo,
Cao Sheng,
Zhou Qing,
Guo Ruiqiang
Publication year - 2018
Publication title -
journal of clinical ultrasound
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.272
H-Index - 61
eISSN - 1097-0096
pISSN - 0091-2751
DOI - 10.1002/jcu.22629
Subject(s) - medicine , atrial fibrillation , sinus rhythm , cardiology , catheter ablation , ablation , doppler echocardiography , reproducibility , doppler effect , receiver operating characteristic , doppler imaging , diastole , statistics , mathematics , blood pressure , physics , astronomy
Purpose The availability of dual Doppler echocardiography (DDE), which facilitates the simultaneous recording of Doppler waveforms at two different sites, has enhanced ability to assess single‐beat atrial mechanical delay. We sought to investigate the predictive value of intra‐left atrial mechanical delay for atrial fibrillation (AF) recurrence after radiofrequency catheter ablation (RFCA) with DDE. Methods Eighty‐six patients with paroxysmal AF scheduled to undergo RFCA were prospectively enrolled. Intra‐atrial and interatrial mechanical delays were evaluated by DDE and traditional tissue Doppler imaging (tTDI), respectively. The time of whole analysis process with each method was recorded. After RFCA, patients were followed for 1 year. Results Thirty (34.88%) patients had AF recurrence, and 56 (65.12%) patients maintained sinus rhythm. Cut‐off values of 39.38 ms for intra‐left atrial mechanical delay obtained by DDE and 32.70 ms by tTDI predicted AF recurrence. Areas under curves were comparable in receiver operator characteristic analysis ( P > .05). The whole analysis time of DDE was less than tTDI. Parameters obtained by DDE had better reproducibility. Conclusion Intra‐left atrial mechanical delay best predicted 1‐year AF recurrence after RFCA. Compared with tTDI, DDE can noninvasively assess single‐beat atrial mechanical delay with high predictive power, less analysis time, and better reproducibility.