Patent ID: 8750973
Filing Date: 2014-06-10
Classification: A61B

Abstract:
1. A system for noninvasive measuring ECG signals produced by the heart of a human subject, and for detecting P-wave in said signals, comprising i) measuring means consisting of at least 9 electrodes, capable of detecting a potential difference at a plurality of points on the skin of said subject during a predetermined time interval (lead signal), providing at least 8 lead signals; ii) electronic circuitry for amplifying said lead signals, reducing noise, converting the lead signals to data and transferring the data to storage means; iii) storage means consisting of an electronic memory for storing all data obtained in measuring said lead signals, for storing software used in processing said signals, and for storing all data resulting from said processing; iv) processing means for calculating linear combinations of said at least eight lead signals and for segmenting said linear combination into time segments one of which is a predetermined marked time segment, followed by applying SUMER technique (Separation Using Maximum Energy Ratio) to calculate a cost function of the energy ratio between said predetermined segment and other segments within said time interval, to maximize said energy ratio and to provide an ECG construct with emphasized P-wave; and v) presenting means for graphical representation of said lead signals and said ECG constructs in a printed form or on display.