Development of simple intraoperative electrophysiological study for chronic atrial fibrillation

目的：明确和分析心房颤动（Ar）时的心房激活及其传播模式并不容易。本研究的目的是开发一种简单的绘图系统，用于手术Af过程中的术中决策。方法：对8例合并其他心脏手术的持续性房颤患者进行心房电图分析。通过可变圆形测图导管从腔房交界处获得aeg。通过实时快速傅立叶变换（FFT）分析检查的优势峰（DPs）的外观和从DPs估计的局部周期长度进行了评估。结果：左上肺静脉（2例）、右上肺静脉（1例）、下腔静脉（1例）4例均出现聚类性dp。2例术后仍有Af的患者，所有映射部位的aeg振幅都很低，因此无法进行分析。结论：利用该系统可以对aeg和DPs进行实时观察。需要进一步的研究和更多的临床数据来建立术中决策的标准。

Objective : It is not easy to clarify or analyze atrial activation and its propagation pattern during atrial fibrillation (Ar). The aim of this study was to develop a simple mapping system for intraoperative decision-making during surgical Af procedure.Methods : Atrial electrograms (AEGs) were analyzed in 8 patients with persistent Af, who underwent hybrid procedure associated with other cardiac surgery. The AEGs were acquired with variable circular mapping catheter from the cavo-atrial jubctions. The appearance of dominant peaks (DPs) examined by means of real-time fast Fourier transform (FFT) analysis and the local cycle length estimated from DPs were assessed.Results : Clustering of DPs were observed in four cases which were collected from left superior pulmonary vein (2 cases), right superior pulmonary vain (1 case) and inferior vena cava (1 case). In two cases with remaining Af postoperatively, the amplitude of AEGs was very low in all mapped portions, so that analysis was not feasible.Conclusion : By using this new mapping system, the AEGs and DPs could be successfully observed at real time. Further investigations with more clinical data are needed to establish the criteria for intraoperative decision-making.