Method for measuring the myocardial electrical impedance spectrum
First Claim
1. A method for measuring a complex impedance spectrum of a portion of myocardium between two electrodes, the method comprising:
- (a) applying a current pulse to the electrodes to generate a voltage response between the electrodes;
(b) sampling and digitizing both the applied current pulse and the voltage response;
(c) performing a fast Fourier transform upon both the digitized current pulse and the digitized voltage response to obtain a complex current pulse spectrum and a complex voltage response spectrum;
(d) dividing the complex voltage response component for each frequency in the voltage response spectrum by the complex current pulse component for each corresponding frequency in the current pulse spectrum to obtain the complex impedance spectrum; and
(e) displaying complex impedance spectrum data for analysis for a physician.
2 Assignments
0 Petitions
Accused Products
Abstract
A method for measuring the complex impedance spectrum of a portion of the myocardium by placing two electrodes on a portion of the myocardium and applying a current pulse to the electrodes to generate a voltage response between the electrodes. Both the current pulse and voltage response are sampled and digitized and then a Fast fourier transform is taken of both the current pulse and the voltage response to obtain a complex current pulse spectrum and a complex voltage response spectrum. Next, the complex voltage response spectrum is divided by the complex current pulse spectrum to obtain the complex impedance spectrum.
145 Citations
6 Claims
-
1. A method for measuring a complex impedance spectrum of a portion of myocardium between two electrodes, the method comprising:
-
(a) applying a current pulse to the electrodes to generate a voltage response between the electrodes; (b) sampling and digitizing both the applied current pulse and the voltage response; (c) performing a fast Fourier transform upon both the digitized current pulse and the digitized voltage response to obtain a complex current pulse spectrum and a complex voltage response spectrum; (d) dividing the complex voltage response component for each frequency in the voltage response spectrum by the complex current pulse component for each corresponding frequency in the current pulse spectrum to obtain the complex impedance spectrum; and (e) displaying complex impedance spectrum data for analysis for a physician. - View Dependent Claims (2, 3, 4, 5, 6)
-
Specification