Method of quantifying cardiac fibrillation using wavelet transfo

Details Method of quantifying cardiac fibrillation using wavelet transfo Method of quantifying cardiac fibrillation using wavelet transfo

1993-10-21

1995-08-08

Kamm, William E.

Surgery: light, thermal, and electrical application

Light, thermal, and electrical application

Electrical therapeutic systems

128705, A61B 5046, A61N 136

Patent

active

054394830

ABSTRACT:
The present invention provides a system and method for characterizing cardiac fibrillation using wavelet transforms. By characterizing the seriousness of a fibrillation episode, a defibrillation shock may be delivered to the heart with less excess energy than conventional ICDs. A wavelet transform is performed on a digitized ECG using a second derivative weight function and the results are analyzed for missing "peaks" in the data. The more serious the fibrillation, the more peaks will be missing from the data. This information may then used to modify the voltage of the defibrillation shocks as a function of the seriousness of the fibrillation.

REFERENCES:
patent: 5077667 (1991-12-01), Brown et al.
patent: 5262958 (1993-11-01), Chui et al.
Wavelets "Signal Representations with Important Advantages", Freeman, Optics & Photonics News Aug. 1993 pp. 8-14.

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