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Static and Dynamic Determinants of Left Ventricular Chamber Stiffness and Filling

  • W. H. Gaasch
  • Y. Arial
  • A. S. Blaustein
Part of the Ettore Majorana International Science Series book series (volume 21)

Abstract

Ventricular filling occurs as a consequence of a left atrial to left ventricular pressure gradient which has generally been though to be primarily due to passive mechanisms influencing both chambers. Left atral pressure is determined by the compliance of the left atrium and pulmonary venous system, the central blood volume, and to some extent by the contractile strength of the atrial myocardium. Left ventricular diastolic pressure is determined by all of the static and dynamic factors which influence chamber stiffness. In this article we will outline the factors which influence the diastolic properties of the left ventricular chamber[1–6]. The discussion will be divided into a review of static factors (i.e. chamber volume, wall mass, and stiffness of the wall) and dynamic factors (i.e. pericardial and right ventricular effects, a hydraulic effect of the coronary vasculature, and the process of myocardial relaxation). This distinction is based on the notion that change in the static factors evolve very slowly, while dynamic factors may change from moment to moment. It should be emphasized, however, that these factors are interdependent and the effect of any single mechanisms is difficult to isolate and evaluate.

Keywords

Dynamic Factor Coronary Perfusion Pressure Left Ventricular Relaxation Diastolic Property Myocardial Relaxation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Plenum Press, New York 1985

Authors and Affiliations

  • W. H. Gaasch
    • 1
  • Y. Arial
    • 1
  • A. S. Blaustein
    • 1
  1. 1.Dept. of MedicineTufts University School of Medicine and the Veterans Adm. Medical CenterBostonUSA

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