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

R. Beyar, S. Sideman, U. Dinnar

Research output: Contribution to journalArticlepeer-review


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
Issue number6
StatePublished - Nov 1984
Externally publishedYes


  • 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


Dive into the research topics of 'Cardiac assist by intrathoracic and abdominal pressure variations: A mathematical study'. Together they form a unique fingerprint.

Cite this