公开(公告)号：IT1193588B

公开(公告)日：1988-07-08

申请号：IT2059881

申请日：1981-03-19

Applicant: DATAMEDIX INC

Inventor： JUDELL NEIL H K

IPC: A61B5/361 ,  A61B

Abstract: A method for declaring the presence of ventricular fibrillation from an incoming electrocardiograph signal includes sampling the signal at a first frequency and filtering the same to produce a secondary frequency lower than the first frequency. This filtered signal is passed to a linear predictor which fits a model signal spectrum to the actual signal spectrum and computes coefficients representative of bandwith and mean frequency of the signal over a short time interval. The method then includes comparing the coefficient of bandwith with a preselected threshold value to determine whether it exceeds same, and, if so, comparing the coefficient of mean frequency with a range of values to determine whether it falls within that range whereby ventricular fibrillation is then declared to be present. An apparatus to carry out the method substantially as described above, is included in this invention.

公开(公告)号：IT8120598D0

公开(公告)日：1981-03-19

申请号：IT2059881

申请日：1981-03-19

Applicant: DATAMEDIX INC

Inventor： JUDELL NEIL H K

IPC: A61B5/361 ,  A61B

Abstract: A method for declaring the presence of ventricular fibrillation from an incoming electrocardiograph signal includes sampling the signal at a first frequency and filtering the same to produce a secondary frequency lower than the first frequency. This filtered signal is passed to a linear predictor which fits a model signal spectrum to the actual signal spectrum and computes coefficients representative of bandwith and mean frequency of the signal over a short time interval. The method then includes comparing the coefficient of bandwith with a preselected threshold value to determine whether it exceeds same, and, if so, comparing the coefficient of mean frequency with a range of values to determine whether it falls within that range whereby ventricular fibrillation is then declared to be present. An apparatus to carry out the method substantially as described above, is included in this invention.

公开(公告)号：EP0047789A4

公开(公告)日：1982-11-08

申请号：EP81901052

申请日：1981-03-19

Applicant: DATAMEDIX INC

Inventor： JUDELL NEIL H K

IPC: A61B5/0432 ,  A61B5/046 ,  A61B5/04

CPC classification number: A61B5/046

Abstract: A method and apparatus for declaring the presence of ventricular fibrillation from an incoming electrocardiographic signal (12) includes sampling (14, 16) at a first frequency and filtering (18) the same to produce a second frequency lower than the first frequency. This filtered signal is passed to a linear predictor (20) which fits a model signal spectrum to the actual signal spectrum and computes (60 d-e, 62 a-c, 64 a-b) coefficients representative of bandwidth and mean frequency of the signal over a short time interval. Then the coefficient of bandwidth (A2) is compared (68, 69) with a threshold value to determine whether or not it exceeds same, and if so the mean frequency coefficient (A1) is compared (71-76) with a range of values to determine whether it falls within a range corresponding to ventricular fibrillation; if it does, ventricular fibrillation is then declared (70) to be present.