Detection of heart failure using a photoplethysmograph
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United States of America Patent
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Sep 28, 2010
Grant Date -
Sep 13, 2007
app pub date -
May 17, 2007
filing date -
Nov 22, 2004
priority date (Note) -
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Abstract
A method for diagnosis includes receiving a signal associated with blood oxygen saturation of a patient during sleep. The signal is filtered so as to eliminate signal components at frequencies equal to and greater than a respiratory frequency of the patient. The filtered signal is processed to detect a pattern corresponding to multiple cycles of periodic breathing.
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