A new non-invasive technique is presented for the characterization of time-dependent spectral properties of atrial fibrillation in the surface ECG. The method uses the Wigner-Ville distribution for time-frequency analysis and the cross Wigner-Ville is used to compute trends which describe the instantaneous frequency of the atrial activity. Preliminary results indicate that short-term variations exist in the fibrillation cycle lengths and that the variations can exhibit similar behavior in the leads V/sub 1/-V/sub 3/.
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机译：提出了一种新的非侵入性技术，用于表征表面心电图中心房纤颤随时间变化的光谱特性。该方法使用Wigner-Ville分布进行时频分析，而交叉Wigner-Ville用于计算描述心房活动瞬时频率的趋势。初步结果表明，在原纤化周期长度中存在短期变化，并且该变化在导线V / sub 1 / -V / sub 3 /中表现出相似的行为。
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