1 / 10

Institute of Biomedical Engineering Department of Engineering Science University of Oxford

Institute of Biomedical Engineering Department of Engineering Science University of Oxford. Heart Sounds in Biosignal Processing Module Centre for Doctoral Training in Healthcare Innovation 11/18 May 2012. S1 – Atrial contraction S2 – Ventricular contraction

gaetan
Download Presentation

Institute of Biomedical Engineering Department of Engineering Science University of Oxford

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Institute of Biomedical Engineering Department of Engineering Science University of Oxford Heart Soundsin Biosignal Processing ModuleCentre for Doctoral Training in Healthcare Innovation11/18 May 2012

  2. S1 – Atrial contraction S2 – Ventricular contraction S3 – Blood returning to the ventricle S4 – Ventricle is too full to contain the blood How a heart sounds Animation of heart valves opening and closing with sound “LUB” “DUB” Normal Abnormal S1 + S2 Lub - Dub S1 + S2 + S3 Ken – Tuck – Y S4 + S1 + S2 Ten – Nes - See

  3. Heart sounds http://commons.wikimedia.org/wiki/File:Phonocardiograms_from_normal_and_abnormal_heart_sounds_with_pressure_diagrams.png How heart sounds change during illness

  4. Heart sounds Chest piece transmits sound to the listener via air-filled hollow tubes • How to record heart sounds? • Acoustic Stethoscope

  5. Heart sounds Place a microphone in the chestpiece Moving magnetic coil  electrical signal • How to record heart sounds? • Electronic Stethoscope - microphone

  6. Heart sounds Connect one end of the crystal with the diaphragm Plates squeezed  electric signal • How to record heart sounds? • Electronic Stethoscope - piezoelectric

  7. Heart sounds Distance between plates Body Electromagnetic diaphragm with conductive inner surface Vibrations  electric signal Conductive plates • How to record heart sounds? • Electronic Stethoscope - capacitor

  8. Heart sounds Ascultation – library of heart sounds Plug-in stethoscope iStethoscope – turn your iPhone into a stethoscope Phone apps

  9. Heart sounds Other uses of stethoscopes:

  10. Heart sounds Any Questions?

More Related