Improved frequency resolution for characterization of complex fractionated atrial electrograms

Table 1 Resolution to discern closely-spaced frequency components

Freq. (Hz)	Res-theor (Hz)	Res-NT (Hz)	Res-FT (Hz)	Significance
9.37 ± 0.47	0.19	0.21 ± 0.05	0.25 ± 0.08	P = 0.307
8.49 ± 0.24	0.15	0.23 ± 0.09	0.28 ± 0.08	P = 0.105
7.51 ± 0.32	0.11	0.18 ± 0.07	0.29 ± 0.18	P = 0.081
6.47 ± 0.27	0.09	0.14 ± 0.04	0.32 ± 0.20	P = 0.003
5.45 ± 0.32	0.06	0.13 ± 0.09	0.27 ± 0.18	P < 0.001
4.37 ± 0.27	0.04	0.08 ± 0.03	0.22 ± 0.07	P < 0.001
3.51 ± 0.29	0.03	0.07 ± 0.04	0.19 ± 0.06	P < 0.001
6.41 ± 2.01 (MN)	0.10	0.16 ± 0.10 (MN)	0.29 ± 0.22 (MN)	P < 0.001

Freq.: the mean frequency used for the test, Res-theor – the theoretical resolving power of the new method, Res – NT: the resolving power of the new method, Res – FT: the resolving power of Fourier analysis, Significance – the significance of the difference between the resolving power of the techniques based on the unpaired t-test. MN – mean value.

ISSN: 1475-925X