The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 02, 1999
Filed:
Aug. 08, 1997
Jyh-Yun J Wang, Newton, MA (US);
Michael Nakagawa, Cambridge, MA (US);
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
Provided are a method and apparatus for assessing the chaotic nature of a waveform representation of heart function. The method and apparatus accomplish their objects via the following. An indicator of triangular-like components within a waveform representation of heart function is calculated. An indicator of an area encompassed by the waveform representation indicative of heart function is calculated. A ratio is calculated utilizing the calculated indicator of an area and calculated indicator of triangular-like components to assess the chaotic nature of the waveform representation of heart function. Additionally, a ventricular fibrillation index is calculated. The calculated ventricular fibrillation index is utilized, in two dimensional space, with the ratio that is calculated utilizing the calculated indicator of an area and the calculated indicator of triangular-like components to assess the likelihood of ventricular fibrillation based upon waveform representation of heart function. Further additionally, a minimum ventricular fibrillation index is calculated. The calculated minimum ventricular fibrillation index is utilized, in two dimensional space, with the ratio that is calculated utilizing the calculated indicator of an area and the calculated indicator of triangular-like components to assess the likelihood of ventricular fibrillation based upon waveform representation of heart function. The minimum calculated ventricular fibrillation is also utilized in one dimensional space to assess the likelihood of ventricular fibrillation based upon waveform representation of heart function.