Measurement of the approximate elapsed time of ventricular fibri

Details Measurement of the approximate elapsed time of ventricular fibri Measurement of the approximate elapsed time of ventricular fibri

1990-06-13

1991-12-31

Smith, Jerry

Boots, shoes, and leggings

128705, G06F 1542, A61B 5046

Patent

active

050776673

ABSTRACT:
The approximate elapsed time since the onset of ventricular fibrillation is detected from an analog electrocardiogram signal. The signal is digitized for a time interval of four seconds to obtain a data set of time domain samples. These time domain samples are Fourier transformed to a frequency domain spectrum and the median frequency which bisects the energy of the power spectrum is detected. That median frequency is then compared to a pattern of experimentally obtained median frequency data as represented by a mathematical algorithm to calculate the estimated time from the onset of ventricular fibrillation. This frequency parameter can also be used to evaluate the response to therapy during ventricular fibrillation and CPR, as well as estimate the most appropriate time to defibrillate a subject following various pharmacologic and mechanical intervention.

REFERENCES:
patent: 4296755 (1981-10-01), Judell
patent: 4680708 (1987-07-01), Ambos
patent: 4924875 (1990-05-01), Chamoun
patent: 4974162 (1990-11-01), Siegel et al.
Nygards et al., "Recognition of ventricular fibrillation utilizing the power spectrum of the ECG", Conference: Computers in Cardiology, Rotterdam, Netherlands, Sep. 29 to Oct. 1, 1977, pp. 393-397 (abstract only).
Kuo et al., "Computer Detection of ventricular fibrillation", Conference: Computers in Cardiology 1978, Sep. 12-14, 1978, Stanford, CA, pp. 347-349 (abstract only).
Herbschleb et al., "Frequency analysis of the ECG before and during ventricular fibrillation", Conference: Computers in Cardiology, Williamsburg, VA, Oct. 22-24, 1980, pp. 365-368 (abstract only).
Nolle et al., "Power spectrum analysis of ventricular fibrillation and imitative artifacts", Conference: Computers in Cardiology, Williamsburg, VA, Oct. 22-24, 1980, pp. 209-212 (abstract only).
Forster et al., "Recognition of ventricular fibrillation, other rhythms and noise in patients developing the sudden cardiac death syndrome", Conference: Computers in Cardiology, Ninth Meeting of Computers in Cardiology, Seattle, WA, Oct. 12-15, 1982, pp. 245-248 (abstract only).
Martin et al., "Effects of calcium antagonists on the time course of ECG power spectrum during ventricular fibrillation", Computers in Cardiology, 1983, pp. 213-216.
Martin et al., "Differences in the time course of the power spectrum during ventricular fibrillation", The Application of Computers in Cardiology, 1984, pp. 179-183.
Martin et al., "Relation between power spectrum time course during ventricular fibrillation and electromechanical dissociation: Effects of coronary perfusion and nifedipine" European Heart Journal, No. 7, 1986, pp. 560-569.

Affiliated with

Also associated with

Rating

Measurement of the approximate elapsed time of ventricular fibri does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Measurement of the approximate elapsed time of ventricular fibri, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Measurement of the approximate elapsed time of ventricular fibri will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1514337