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Related Concept Videos

Imaging Studies for Cardiovascular System I:Echocardiography01:17

Imaging Studies for Cardiovascular System I:Echocardiography

Cardiac imaging studies encompass a wide range of noninvasive and minimally invasive techniques designed to visualize the heart's structure and function in detail. One such technique is echocardiography, which uses high-frequency ultrasound waves to produce detailed images of the heart, known as echocardiograms.
Indications: Echocardiography is utilized to diagnose heart failure, valve disorders, and myocardial infarction. It also assesses cardiac structures' size, shape, and motion, evaluates...

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Related Experiment Video

Updated: May 14, 2026

Ultrasonic Assessment of Myocardial Microstructure
10:53

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Published on: January 14, 2014

Myocardial contractility: a seismocardiography approach.

Kouhyar Tavakolian1, Gonzalo Portacio, Niloufar R Tamddondoust

  • 1Department of Electrical and Computer Engineering, University of British Columbia, Vancouver, BC, Canada. kouhyart@ece.ubc.ca

Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
|February 1, 2013
PubMed
Summary

Seismocardiogram (SCG) R-AO period effectively predicts myocardial contractility. This non-invasive method shows strong correlation with left ventricular pressure and stroke volume, offering a promising tool for cardiac assessment.

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Measurement of Heart Contractility in Isolated Adult Human Primary Cardiomyocytes
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Area of Science:

  • Cardiology
  • Biomedical Engineering
  • Physiology

Background:

  • Myocardial contractility is crucial for cardiac function.
  • Accurate assessment of contractility is vital for diagnosing and managing heart conditions.
  • Current methods for assessing contractility can be invasive or complex.

Purpose of the Study:

  • To investigate the correlation between seismocardiogram (SCG) features and myocardial contractility indexes.
  • To determine if SCG can non-invasively predict left ventricular pressure derivative (dP/dt(max)) and stroke volume.

Main Methods:

  • Feature extraction from seismocardiogram (SCG) data.
  • Correlation analysis between SCG features and myocardial contractility indexes (dP/dt(max), stroke volume).
  • Studies conducted on pigs and human subjects under controlled conditions (lower body negative pressure).

Main Results:

  • The R-AO period (pre-ejection period) of the SCG showed a strong negative correlation with dP/dt(max) in pigs (r = -0.86).
  • The R-AO period also demonstrated the highest correlation with stroke volume in human subjects (r = -0.90).

Conclusions:

  • The R-AO period derived from SCG is a reliable non-invasive indicator of myocardial contractility.
  • SCG analysis offers a promising, accessible method for assessing cardiac function and stroke volume.