A Single-Beat Estimation Method for Emax Directly Based on Linearity of Ventricular Elastance

Abstract

This paper has derived a new method for estimating the maximum ventricular elastance Emax by assuming that the following two assumptions are simultaneously established in a certain part of the ejection period: the ventricular elastance E(t) changes linearly with time and the dead volume does not change. The method can estimate Emax in a single beat without any change in the cardiac load by measuring the ventricular pressure and either the ventricular volume or outflow. The method does not need to previously assign the approximation range of Emax(t) and does not include the recursive procedure to search for the peak time tmax that gives Emax. In an experiment in vivo, it could be ascertained that the method can derive the estimate of EMAX roughly close to the true value.

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Document Details

Document Type
Technical Report
Publication Date
Oct 25, 2001
Accession Number
ADA409675

Entities

People

  • Akira Tanaka
  • Hiroshi Takeda
  • Ken-ichi Abe
  • Makoto Yoshizawa
  • Megumi Yokogawa

Organizations

  • Tohoku University

Tags

DTIC Thesaurus Topics

  • Abstracts
  • Accuracy
  • Arteries
  • Catheters
  • Classification
  • Curve Fitting
  • Data Processing
  • Ejection
  • Electronic Mail
  • Flow Rate
  • Language
  • Measurement
  • Military Research
  • Peak Values
  • Pressure Transducers
  • Steady State
  • Universities

Readers

  • Battery Technology and Engineering
  • Regression Analysis.
  • Trauma Surgery or Emergency Medicine.