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Path length entropy analysis of diastolic heart sounds

Benjamin Griffel1, Mohammad K Zia, Vladamir Fridman

  • 1Department of Surgery, University of Medicine and Dentistry of New Jersey, Clinical Academic Building, 125 Patterson Street, New Brunswick, NJ 08901, USA. benjamin.griffel@gmail.com

Computers in Biology and Medicine
|August 13, 2013
PubMed

Keywords:
1/f noiseBioacousticsCoronary artery diseaseDiastolic murmursEntropyNoninvasive measurementsNonlinear signal processing

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Heart Sounds01:15

Heart Sounds

Heart sounds are generated by the turbulence in blood flow due to the closing of heart valves. These sounds are best perceived slightly away from the valves, where the blood flow disseminates the sound.
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Cardiovascular System Abnormal Findings II: Auscultation

Auscultation, an essential part of a heart examination, is done using a stethoscope. It provides crucial information about heart function and possible heart problems. Due to heart problems, abnormal sounds can be heard during systole or diastole. These sounds include S3 and S4 gallops, opening snaps, systolic clicks, and murmurs.
Abnormal Heart Sounds
Gallops:
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Assessment of the Cardiovascular System IV: Auscultation

Cardiac auscultation is a clinical skill used to assess heart function and detect abnormalities. It involves listening to heart sounds at specific anatomical locations through a stethoscope.
Normal Heart Sounds
S1 (First Heart Sound)-
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Pulse

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Korotkoff Sounds

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Interference: Path Lengths

Consider two sources of sound, that may or may not be in phase, emitting waves at a single frequency, and consider the frequencies to be the same.
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