Abstract：
:Impedance cardiography is a low-cost noninvasive technique, based on monitoring of the thoracic impedance, for estimation of stroke volume (SV). Impedance cardiogram (ICG) is the negative of the first derivative of the impedance signal. A technique for beat-to-beat SV estimation using impedance cardiography and artificial neural network (ANN) is proposed. A three-layer feed-forward ANN with error back-propagation algorithm is optimized by examining the effects of number of neurons in the hidden layer, activation function, training algorithm, and set of input parameters. The input parameters are obtained by automatic detection of the ICG characteristic points, and the target values are obtained by beat-to-beat SV measurements from time-aligned Doppler echocardiogram. The technique is evaluated using an ICG-echocardiography database with recordings from subjects with normal health in the under-rest and post-exercise conditions and from subjects with cardiovascular disorders in the under-rest condition. The proposed technique performed much better than the earlier established equation-based estimations, and it resulted in correlation coefficient of 0.93 for recordings from subjects with cardiovascular disorders. It may be helpful in improving the acceptability of impedance cardiography in clinical practice. Graphical abstract ᅟ.
journal_name
Med Biol Eng Computjournal_title
Medical & biological engineering & computingauthors
Naidu SMM,Pandey PC,Bagal UR,Hardas SPdoi
10.1007/s11517-017-1752-5subject
Has Abstractpub_date
2018-06-01 00:00:00pages
1077-1089issue
6eissn
0140-0118issn
1741-0444pii
10.1007/s11517-017-1752-5journal_volume
56pub_type
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