Cardiac assist by intrathoracic and abdominal pressure variations: A mathematical study

R. Beyar, S. Sideman, U. Dinnar

Research output: Contribution to journalArticle

Abstract

A lumped parameter mathematical model of the complete cardiovascular system simulating cardiac assist by external pressure variations is presented. The various vascular compartments are assumed to have appropriate resistance, capacitance and inductance values. The right and left ventricles are represented by time varying capacitances reciprocal to the time varying elastances. The effects of external pressure variations on the circulation are evaluated for different modes of operation. Systolic thoracic pressure waves, diastolic abdominal pressure waves and a combination of both waves are shown to have a favourable effect on the circulation in cardiogenic shock. The different mechanism of cardiocirculatory assist involved are presented and discussed below

Original languageEnglish (US)
Pages (from-to)507-515
Number of pages9
JournalMedical & Biological Engineering & Computing
Volume22
Issue number6
DOIs
StatePublished - Nov 1984
Externally publishedYes

Fingerprint

Heart Ventricles
Blood Pressure
Pressure
Cardiogenic Shock
Cardiovascular System
Blood Vessels
Theoretical Models
Capacitance
Thorax
Cardiovascular system
Inductance
Mathematical models

Keywords

  • Cardiac assist
  • Intrathoracic pressure variations
  • Mathematical model

ASJC Scopus subject areas

  • Health Information Management
  • Health Informatics
  • Biomedical Engineering
  • Computer Science Applications
  • Computational Theory and Mathematics

Cite this

Cardiac assist by intrathoracic and abdominal pressure variations : A mathematical study. / Beyar, R.; Sideman, S.; Dinnar, U.

In: Medical & Biological Engineering & Computing, Vol. 22, No. 6, 11.1984, p. 507-515.

Research output: Contribution to journalArticle

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