Patent ID: 8571645

Claim:
A system for evaluating cardiovascular performance in real time and characterized by conversion of a surface potential into multi-channels, the system comprising: an electrocardiographic signal measuring unit comprising at least one channel located at different spatial positions, the electrocardiographic signal measuring unit recording electrocardiographic signals (ECG signals) measured with the channels, the ECG signals each comprising a P wave, a Q wave, a R wave, a S wave, and a T wave; a reconstruction unit electrically connected to the electrocardiographic signal measuring unit, the reconstruction unit having a reconstruction algorithm for calculating eigenvectors of the ECG signals and using the eigenvectors as a base for calculating an eigenvalue matrix, the reconstruction unit calculating at least one reconstructed ECG signal at other different spatial positions with the eigenvalue matrix and the ECG signals of the channels, the at least one reconstructed ECG signal comprising a reconstructed P wave, a reconstructed Q wave, a reconstructed R wave, a reconstructed S wave, and a reconstructed T wave; and a parameter computation and assessment unit electrically connected to the reconstruction unit and having a parameter computation and assessment algorithm, wherein the parameter computation and assessment unit receives the ECG signals and the at least one reconstructed ECG signal, calculates an interval from a starting point of the Q wave to an ending point of the T wave of the ECG signals, calculates variation in a reconstruction interval from a starting point of the reconstructed Q wave to an ending point of the reconstructed T wave of the at least one reconstructed ECG signal against time at different spatial positions, and evaluates the degree of discreteness of the ECG signals and the at least one reconstructed ECG signal with the parameter computation and assessment algorithm; wherein the parameter computation and assessment algorithm is: SI QTc =(1/S) SI QTc = ( 1 / S ) ⁢ ∑ S ⁢ ⁢ { ( 1 / n ) ⁢ ∑ n ⁢ ⁢  ( QT c ) k - ( QT c ) n  } , wherein SI QTc denotes the degree of discreteness of the ECG signals and the at least one reconstructed ECG signal, S denotes a total number of points of measurement of the ECG signals and the at least one reconstructed ECG signal, k denotes a fixed spatial position, n denotes a number of points of measurement most proximate to the fixed spatial position, and QT c denotes a multi-dimension space defined by the interval of the ECG signals and the reconstruction interval of the at least one reconstructed ECG signal.