Time-frequency analysis of the QRST-cancelled signal revealed that a high fibrillation frequency is often associated with a sinusoidal shape, whereas a low frequency is associated with a sawtooth shape.
Cross-Sectional (n=182)
A novel time-frequency analysis of surface ECGs demonstrates that atrial fibrillation waveform shape correlates with fibrillation frequency.
A new method for characterization of atrial fibrillation in the surface ECG is presented which is based on a time-frequency distribution of the QRST-cancelled signal. With the present method, information regarding temporal variations in fibrillation frequency and waveform shape is extracted and investigated. The method is evaluated on a database including 182 recordings (obtained during resting conditions) from patients diagnosed with atrial fibrillation. The results show that a high fibrillation frequency is often associated with a sinusoidal shape whereas a low frequency is more associated with a sawtooth-like shape.
Stridh et al. (Wed,) conducted a cross-sectional in Atrial fibrillation (n=182). Time-frequency analysis of the QRST-cancelled signal was evaluated on Temporal variations in fibrillation frequency and waveform shape. Time-frequency analysis of the QRST-cancelled signal revealed that a high fibrillation frequency is often associated with a sinusoidal shape, whereas a low frequency is associated with a sawtooth shape.
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