group 2: heart sounds project

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

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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 - PowerPoint PPT Presentation

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HEART SOUNDS

Group 2: Heart Sounds Project

Alvaro Franco Tuan Nguyen Menline Lu Edgar Umpierrez Rudy Martinez

HEART SOUNDS OVERVIEWClinical Aspects and Physiology Mechanical Interface DesignElectronic Module DesignVideo DemonstrationLong Term Data & ResultsFuture Directions / ImprovementsLive Demonstration

R. Atrium

R. VentriclePulmonary VeinsSystemic VeinsPulmonary ArteriesL. Atrium

L. Ventricle

Systemic ArteriesPulmonary Circuit Oxygen-poor CO2 rich blood

Oxygen-rich CO2 poor blood

Systemic Circuit

AV nodeInternodal PathwayAV bundlePurkinje fibersBundle BranchesSA nodePathway of Depolarization

The cardiac cycle have three phases:

Phase 1 Ventricular filling

Phase 2 Ventricular systole

Phase 3 Isovolumetric relaxation

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

Blood Flow is Controlled by Pressure Changes

Heart Sound S3

Heart Sound S4

Schematic

Specifications

High pass (fc= 20 Hz)Gain= 10First order filterBand Pass FilterFilter outputSpecifications

First order filterLow pass(fc= 120Hz)Gain= 1

Inverting AmplifierAmplifier outputSpecifications

Gain = 100

Envelop detector

Specifications

C= 1uFR= 1MT= 1sEnvelop output

Long Term DataRestingStandingRunningObservations About ResultsReliable SignalsSubject must be still and relaxed.Subject and his/her surroundings must be quiet.Unreliable signalsSubject Moves or talk/laughs.Environment is loud and full of activity.Interfering noises coming from surrounding environment.

Heartbeat Motor of Today A wrist watch or a mobile phoneA chest strapMicroprocessorEKG Other Parameter

Todays Heartbeat MonitorThe Berkeley Tricorder

Future Direction ContHeartbeat Sensor University of SussexMilitary personnel usageCivilian UsageLessons LearnedAmplifier gain equal to 1000 A band pass Filter between 20-120 HzThis prototype can detect S3 and S4 sound

Thank you !!!

Questions?

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