Method and apparatus for blanking T-waves from combipolar...

Details Method and apparatus for blanking T-waves from combipolar... Method and apparatus for blanking T-waves from combipolar...

2005-03-01

2005-03-01

Schaetzle, Kennedy (Department: 3762)

Surgery

Diagnostic testing

Cardiovascular

C607S009000

Reexamination Certificate

active

06862471

ABSTRACT:
The stimulation device blanks T-waves from the atrial channel of an electrical cardiac signal by employing a T-wave blanking interval localized to the expected location and duration of the T-wave. To this end, the stimulation device determines the average interval between an R-wave and a T-wave in the patient in which the device is implanted and also determines the average duration of a T-waves within the patient. A T-wave blanking interval is initiated following the average R-T interval subsequent to detection of an R-wave and lasts for a period of time equal to the average T-wave duration. In this manner, highly localized T-wave blanking is achieved permitting P-waves or other atrial signals to be detected during remaining non-blanked portions of the atrial channel of the cardiac signal at least for the purposes of atrial rate detection. The relatively short T-wave blanking interval of the invention is particularly well suited for use in combipolar sensing systems. Method and apparatus implementations are described.

REFERENCES:
patent: 5148812 (1992-09-01), Verrier et al.
patent: 5466254 (1995-11-01), Helland
patent: 5522855 (1996-06-01), Hoegnelid
patent: 5685315 (1997-11-01), McClure et al.
patent: 6539259 (2003-03-01), Weinberg et al.
patent: 6711438 (2004-03-01), McClure et al.

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