Heart sound detector and synchronization for diagnostics
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United States of America Patent
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Oct 15, 1985
Issued Date -
N/A
app pub date -
Feb 23, 1984
filing date -
Mar 6, 1981
priority date (Note) -
Expired
status (Latency Note)
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Abstract
From a heart sound signal input the occurrence of a first occurring heart sound is detected. Thereupon a predetermined heart sound enable window time is established, which for a first detection cycle is set to approximately the diastolic interval for the maximum heart rate to be detected. If a second heart sound occurs within this heart sound enable window time, this second heart sound is detected as a systole heart sound. The first heart sound may be detected as a diastole heart sound. If a second heart sound does not occur within the heart sound enable window time the procedure is repeated with increasing heart sound enable time as long as a second heart sound occurs within an increased heart sound enable window time. For diagnostics synchronization signals developed exclusively from the heart sound signals are used to validate data from diagnostic equipment such as a gamma camera.
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