Patent ID: 8036733

Claim:
A computer-implemented diagnostic parameter calculation method for performing diagnosis, comprising the steps of: collecting digital electrocardiogram data during a predetermined time interval; detecting R-R intervals of the electrocardiogram data to generate a time-series data; generating a series of partial sets B(j)'s, each of which contains n successive elements starting from the j-th element of said time-series data, wherein n is a constant integer smaller than the total number of elements in said time-series data; calculating, using a computer, a set of characteristic quantities (y j , x j ) for each partial set B(j) wherein y j is the mean value of all elements in the set B(j) and x j is the mean value of each difference of the first element from each element in the partial set B(j); and calculating, using a computer, an isolation number v and an overlap number u as parameters for diagnosis after splitting (y, x)-plane into lattices, wherein said isolation number v is the number of said characteristic quantity sets each of which is included in a lattice on (y, x)-plane that does not include any other characteristic quantity set, and said overlap number u is the difference subtracted said isolation number v from the total number of said characteristic quantity sets; wherein calculated isolation number v and overlap number u are used as parameters for diagnosis of a condition of a heart of a patient.