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Group 2: Heart Sounds Project

Group 2: Heart Sounds Project. Alvaro Franco Tuan Nguyen Menline Lu Edgar Umpierrez Rudy Martinez. HEART SOUNDS OVERVIEW. Clinical Aspects and Physiology Mechanical Interface Design

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Group 2: Heart Sounds Project

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  1. Group 2: Heart Sounds Project Alvaro Franco Tuan Nguyen Menline Lu Edgar Umpierrez Rudy Martinez

  2. HEART SOUNDS OVERVIEW • Clinical Aspects and Physiology • Mechanical Interface Design • Electronic Module Design • Video Demonstration • Long Term Data & Results • Future Directions / Improvements • Live Demonstration

  3. Pulmonary Circuit Pulmonary Veins Pulmonary Arteries Oxygen-poor CO2 rich blood Oxygen-rich CO2 poor blood L. Atrium L. Ventricle R. Atrium R. Ventricle Systemic Arteries Systemic Veins Systemic Circuit

  4. Pathway of Depolarization SA node Internodal Pathway AV node AV bundle Bundle Branches Purkinje fibers

  5. The cardiac cycle have three phases: Phase 1 Ventricular filling Phase 2 Ventricular systole Phase 3 Isovolumetric relaxation

  6. Blood Flow is Controlled by Pressure Changes • Pressure changes reflects the contraction and relaxation of the heart • Blood moves from higher pressure to lower pressure • Changes in the pressure is the reason why the heart valves open and close and keeps the blood flow moving in forward direction

  7. Heart Sound S3 Heart Sound S4

  8. Schematic

  9. Band Pass Filter Specifications First order filter Low pass (fc= 120Hz) Gain= 1 Filter output Specifications High pass (fc= 20 Hz) Gain= 10 First order filter

  10. Inverting Amplifier Specifications Gain = 100 Amplifier output

  11. Envelop detector Specifications C= 1uF R= 1MΩ T= 1s Envelop output

  12. Long Term Data Running Standing Resting

  13. Observations About Results • Reliable Signals • Subject must be still and relaxed. • Subject and his/her surroundings must be quiet. • Unreliable signals • Subject Moves or talk/laughs. • Environment is loud and full of activity. • Interfering noises coming from surrounding environment.

  14. Heartbeat Motor of Today • A wrist watch or a mobile phone • A chest strap • Microprocessor • EKG • Other Parameter

  15. Today’s Heartbeat Monitor • The Berkeley Tricorder

  16. Future Direction Cont’ • Heartbeat Sensor • University of Sussex • Military personnel usage • Civilian Usage

  17. Lessons Learned • Amplifier gain equal to 1000 • A band pass Filter between 20-120 Hz • This prototype can detect S3 and S4 sound

  18. Thank you !!! Questions?

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