Apparatus for measuring cardiac signals, using acoustic and ecg signals
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United States of America Patent
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Nov 11, 1997
Grant Date -
N/A
app pub date -
Mar 5, 1996
filing date -
Jun 2, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An apparatus for measuring the cardiac valve function of a person by analyzing an acoustic signal from the heart. The acoustic signal is synchronized with the electrocardiographic signal obtained from the heart. In order to improve the signal-to-noise ratio of the input electrocardiographic signal, the mains-synchronous noise is subtracted from the input electrocardiographic signal. Before analysis of the acoustic signal, a weighting is performed, compensating for individual differences in, in particular, the layer of body fat.
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