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Related Concept Videos

Heart Sounds01:15

Heart Sounds

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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.
Auscultation is the process of listening to these internal body sounds using a stethoscope. The heart produces four types of sounds, but only two—S1 and S2—can usually be heard with a stethoscope.
S1, also known as the "lub" sound, is caused by the closure of atrioventricular (A-V)...
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Pulse rhythm01:30

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Pulse rhythm refers to the pattern of pulsations within specific intervals, offering valuable insights into the regularity or irregularity of the heart's beats as observed through the pattern of pulsation within specific intervals. A regular pulse exhibits a consistent heart rate with uniform waveforms and pulsation force, variations of which can be classified as normal, weak, or bounding.
Conversely, an irregular pulse pattern is termed dysrhythmia, stemming from disruptions in cardiac...
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Pulse Oximetry01:24

Pulse Oximetry

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Pulse oximetry, or SpO2, is a non-invasive method for continuously monitoring arterial oxygen saturation (SaO2). This procedure involves attaching a probe or sensor to the patient's fingertip, forehead, earlobe, or nose bridge. The sensor works by detecting changes in oxygen saturation levels through light signals generated by the oximeter and reflected by the pulsing blood under the probe.
Purpose
Average SpO2 values are greater than 95%. If the readings fall below 90%, it indicates that...
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Development of the Heart01:27

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The development of the human heart, a crucial organ, commences from the mesoderm on the 18th or 19th day after fertilization. This process initiates in the cardiogenic area, a group of mesodermal cells at the embryo's head end, which evolves into elongated strands known as cardiogenic cords. These cords undergo a transformation to form hollow-centered endocardial tubes.
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Assessing Blood pressure using a doppler ultrasound01:19

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To obtain accurate blood pressure measurements in clinical settings, especially when traditional methods are insufficient, healthcare professionals utilize the Doppler ultrasound technique. This method uses high-frequency sound waves to detect blood flow within the arteries, which is crucial for patients with conditions that complicate circulatory system assessment.
Pre-Procedural Guidelines for Doppler Ultrasound Blood Pressure Assessment:
Preparation of Equipment:
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Assessment of the Cardiovascular System IV: Auscultation01:25

Assessment of the Cardiovascular System IV: Auscultation

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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)-
S1 is made by the closure of the mitral and tricuspid valves (atrioventricular valves), marking the beginning of systole.
S2 (Second Heart Sound)-
S2 is made by the closure of the aortic and pulmonic valves (semilunar valves), marking the end of the systole.
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Development of a Multi-Channel Wearable Heart Sound Visualization System.

Binbin Guo1, Hong Tang1,2, Shufeng Xia3

  • 1School of Biomedical Engineering, Dalian University of Technology, Dalian 116024, China.

Journal of Personalized Medicine
|December 23, 2022
PubMed
Summary
This summary is machine-generated.

A novel wearable system visualizes heart sounds using 72 sensors, creating cardiac acoustic maps to detect vibrations and sound propagation. This technology aids in identifying optimal auscultation positions and understanding heart sound transmission.

Keywords:
acoustic mappingacoustic sensormultichannel measurement systemphonocardiogramsensor arrays

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Area of Science:

  • Biomedical Engineering
  • Cardiology
  • Signal Processing

Background:

  • Traditional auscultation relies on subjective interpretation and limited spatial information.
  • Understanding heart sound propagation is crucial for accurate cardiac diagnosis.

Purpose of the Study:

  • To develop and design a multi-channel wearable system for visualizing heart sounds.
  • To create cardiac acoustic maps for detecting cardiac vibration and heart sound propagation.
  • To assess the system's ability to visualize heart sound variations and guide auscultation.

Main Methods:

  • Acquisition of 72 heart sound signals and 1 ECG signal using novel, high-sensitivity sensors.
  • Application of Butterworth filtering and wavelet transform for signal noise reduction.
  • Generation of cardiac acoustic maps via cubic spline interpolation of processed heart sound data.

Main Results:

  • Successful detection and visualization of heart sound signals on the chest surface.
  • Clear display of variations in heart sounds, enabling detailed analysis.
  • Demonstration of the system's capability to image cardiac acoustic maps.

Conclusions:

  • The developed visualization system effectively detects and displays heart sounds.
  • Cardiac acoustic mapping offers a novel approach to understanding heart sound propagation.
  • This technology can guide optimal auscultation site selection and enhance cardiac diagnostics.