group 2: heart sounds project
DESCRIPTION
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 PresentationTRANSCRIPT
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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