Biomedical Engineering Reference
In-Depth Information
Endocardial signal
a
0.1
0
− 0.1
ECG recording (lead V1)
0.5
b
0
−0.5
STC
0.2
c
0.1
0
− 0.1
PCA
0.2
d
0.1
0
−0.1
ICA
0.2
e
0.1
0
−0.1
ICA−SOBI
0.2
f
0.1
0
−0.1
RobustICA−f
0.2
g
0.1
0
−0.1
MaxViT
0.2
h
0.1
0
−0.1
0
1
2
3
4
5
time (s)
Fig. 3.5
Estimation of the atrial activity signal in the surface ECG during AF. (
a
) Endocardial
signal recorded from the atrial wall (
left atrial appendage
) of a persistent AF patient. (
b
) Surface
ECG signal recorded simultaneously in lead V1 from the same patient. (
c
) Atrial activity signal
estimated in lead V1 by the spatio-temporal QRST cancellation (STC) method of [
17
,
27
]. (
d
)-(
h
)
Atrial activity signal estimated in lead V1 by the BSS-based methods described in Sects.
3.3.3
-
3.3.4
. For reference,
light grey lines
show the signal recorded in lead V1. Signal amplitudes are in
mV. The corresponding frequency spectra are shown in Fig.
3.6
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