Time-frequency characterization of simultaneous intra-atrial and electrocardiographic recordings during atrial fibrillation

Computers in Cardiology, 2005 Pub Date : 1900-01-01 DOI:10.1109/CIC.2005.1588108

M. Stridh, A. Bollmann, D. Husser, A. Bhandari, D. Cannom, L. Sornmo

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引用次数: 4

Abstract

A new method for characterization of simultaneous intra-atrial and ECG recordings during atrial fibrillation (AF) is presented. With different preprocessing, both types of signals are characterized using a logarithmic time-frequency distribution from which trends of frequency, regularity, morphology (only ECG) and signal quality are extracted. The objective of the study is to relate ECG measures of rate and morphology to measures of intra-atrial organisation. The algorithm has been tested on a database with simultaneous ECG and right atrial recordings from 34 patients with drug-refractory AF. The average frequency in lead V1 was 5.91 Hz (std=0.94) and the average exponential decay of harmonic magnitudes (reflecting the morphology) in V1 was 1.31 (std=0.38); their correlation coefficient was 0.53 (p<0.001). The correlation coefficient between spatial frequency dispersion in the right atrium and harmonic decay was 0.53 (p<0.005). More organized AF, observed in patients treated with amiodarone, was reflected by a lower frequency, smaller right atrial frequency dispersion and lower exponential decay

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房颤期间同时房内和心电图记录的时频特征

提出了一种表征心房颤动(AF)期间同时进行心房和心电图记录的新方法。通过不同的预处理，两种类型的信号都使用对数时频分布来表征，从中提取频率、规律性、形态(仅ECG)和信号质量的趋势。该研究的目的是将心率和形态学的心电图测量与房内组织的测量联系起来。该算法在34例药物难治房颤患者的心电图和右心房同时记录的数据库中进行了测试。V1导联的平均频率为5.91 Hz (std=0.94)， V1导联的谐波幅度(反映形态)的平均指数衰减为1.31 (std=0.38);相关系数为0.53 (p<0.001)。右心房空间频散与谐波衰减的相关系数为0.53 (p<0.005)。在胺碘酮治疗的患者中观察到更有组织的房颤，反映在更低的频率，更小的右心房频散和更低的指数衰减

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Computers in Cardiology, 2005

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