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Hemodynamic correlates of the third heart sound and systolic time intervals

Sanjiv J Shah1, Andrew D Michaels

  • 1Department of Medicine, Division of Cardiology, University of California, San Francisco, San Francisco, CA, USA.

Congestive Heart Failure (Greenwich, Conn.)
|August 9, 2006
PubMed

Insights

New technology enables noninvasive bedside measurement of heart sounds (S3) and systolic time intervals, aiding heart failure diagnosis. This system helps improve patient care by providing objective data previously requiring invasive methods.

Area of Science:

  • Cardiology
  • Biomedical Engineering
  • Medical Diagnostics

Background:

  • Cardiac auscultation and phonocardiography are vital for understanding heart failure pathophysiology.
  • Traditional methods for assessing diastolic heart sounds (S3, S4) and systolic time intervals have limitations, including declining auscultation skills and the need for carotid pulse tracings.
  • A decline in auscultation skills necessitates improved, objective bedside diagnostic tools for heart failure.

Purpose of the Study:

  • To introduce a novel, inexpensive, noninvasive system for automated heart sound detection and systolic time interval measurement.
  • To present data on the hemodynamic correlates of the S3 sound and abnormal systolic time intervals using this new technology.
  • To establish a foundation for utilizing this system to enhance the understanding and clinical application of S3 and systolic time intervals in heart failure diagnosis and management.

Main Methods:

  • Development of a new system for automated, noninvasive detection of heart sounds and measurement of systolic time intervals.
  • Utilizing the system to collect data on hemodynamic correlates of the S3 sound and systolic time intervals.
  • Analysis of the collected data to establish foundational understanding and test characteristics.

Main Results:

  • The new system successfully automates the detection of heart sounds and measurement of systolic time intervals.
  • Data were presented on the hemodynamic correlates of the S3 sound and abnormal systolic time intervals.
  • The findings support the system's utility in providing objective diagnostic information.

Conclusions:

  • The developed system offers a simple, inexpensive, and noninvasive approach to bedside assessment in heart failure.
  • This technology can help overcome limitations of traditional auscultation and carotid pulse tracings.
  • Further research using this system can refine the understanding of S3 and systolic time intervals, improving heart failure diagnosis and management.

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