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:
Apr. 02, 2002
Filed:
Dec. 29, 1999
Claudio P. Mejia, Stafford, TX (US);
GE Medical Systems Information Technologies, Inc., Waukesha, MI (US);
Abstract
A method and apparatus for determining A, C, and V waves in an atrial pressure waveform. The method includes the acts of establishing a time reference based on R waves in an ECG. A first interval in the an atrial pressure waveform between a first point offset ahead of a first R wave and a second point offset behind the first R wave is determined. The highest peak within the first interval is then identified. This peak is the A wave. Once the A wave is identified, a second R wave in the ECG, ahead of the first R wave, is identified. A second interval in the atrial pressure waveform that extends from the second point to a third point is established. The third point is positioned at a distance ahead of the second point equal to a percentage of the interval from the second point to a location behind the second R wave. The highest peak in the second interval is the V wave. After identifying the V wave, a third interval in the atrial pressure waveform is established. The third interval extends from the highest peak in the first interval to a fourth point. The fourth point is positioned at a distance ahead of the highest peak in the first interval (the A wave) equal to a second percentage of the distance between the highest peak in the first interval and the highest peak in the second interval (the V wave). The C wave is the highest peak in the third interval.