Method and apparatus for more precisely determined mean left atrial pressure
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United States of America Patent
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Aug 13, 2002
Grant Date -
Jan 17, 2002
app pub date -
May 15, 2001
filing date -
Jun 12, 1997
priority date (Note) -
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status (Latency Note)
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Abstract
A method and apparatus for more precisely determining mean left atrial pressure. A catheter including a balloon is inserted into an esophagus with the balloon positioned adjacent the left atrium and inflated to provide a signal of balloon pressure oscillations effected by the left atrium. By use of the fast Fourier transform, the amplitude of each of simple harmonic wave forms (or a corresponding portion thereof) making up the balloon pressure oscillation signal is corrected for characteristics of the catheter and the corrected wave forms combined into a corrected signal of balloon pressure oscillations. The balloon pressure is measured when the amplitude of the corrected balloon pressure oscillation signal is at a peak, wherein the measured balloon pressure is determined to be mean left atrial pressure.
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