Hybrid Computation of Left Ventricular Performance Using Noninvasive Technics.

Abstract

An automated method for a beat-to-beat analysis of Systolic Time Intervals (STI) has been developed using a unilateral hybrid computer system. Beat number, time of occurrence of beat, heart rate preejection period (PEP), preejection period index (PEPI), left ventricular ejection time (LVEF), left ventricular ejection time index (ETI), total electromechanical systole (Q-S2), total electromechanical systole index (Q-S2I), isovolumic contraction time (IVCT), and ratio of PEP to LVET were calculated from simultaneous recordings of electrocardiogram, carotid pulse, and phonocardiogram. The ability of automated analysis to provide beat-to-beat values extends the usefulness of this noninvasive method to evaluate left ventricular performance. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1978
Accession Number
ADA063749

Entities

People

  • Edward L. Fitzpatrick
  • F. Wesley Baumgardner
  • Joel A. Strom
  • John W. Slaughter
  • Paul J. Zalesky

Organizations

  • United States Air Force School of Aerospace Medicine

Tags

Communities of Interest

  • Advanced Electronics
  • Biomedical
  • Engineered Resilient Systems
  • Space

DTIC Thesaurus Topics

  • Aerospace Medicine
  • Analog Computers
  • Cardiovascular Physiological Phenomena
  • Cardiovascular Physiological Processes
  • Cardiovascular System
  • Computer Programs
  • Computers
  • Detection
  • Digital Computers
  • Electrocardiography
  • Frequency
  • Health Services
  • Heart Rate
  • Hybrid Computers
  • Magnetic Tape
  • Pattern Recognition
  • Time Intervals

Readers

  • Cardiovascular Physiology
  • Computational Modeling and Simulation

Technology Areas

  • Microelectronics
  • Microelectronics - Microelectromechanical Systems