Determining heart rate

Details Determining heart rate Determining heart rate

2006-11-14

2006-11-14

Pezzuto, Robert E. (Department: 3766)

Surgery

Diagnostic testing

Cardiovascular

Reexamination Certificate

active

07135002

ABSTRACT:
This invention concerns a method and system for automatically determining heart rate. The invention can be applied to determining the heart of any animal including humans. The method involves sensing body sounds and transducing them to electrical signals. Digitizing the electrical signals. Emphasizing the heart sound maxima (S1and S2signals) relative to noise by filtering, decompression and squaring. Detecting local maxima in the signals as likely S1signals and generating a threshold amplitude. Selecting maxima that exceed the threshold as surviving likely candidate S1signals. Screening the surviving candidate S1against physiologically derived criteria. And, calculating the heart rate from the screened S1.

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Eric W. Weisstein. “First Derivative Test.” From MathWorld—A Wolfram Web Resource. http://mathworld.wolfram.com/FirstDerivativeTest.html.
Eric W. Weisstein. “Finite Difference.” From MathWorld—A Wolfram Web Resource. http://mathworld.wolfram.com/FiniteDifference.html.

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