English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

For a better understanding of the functional roles of the heart as a pump system, an analogy with an industrial fluid-pump system is beneficial. In this paper, the use of the ventricular pressure-volume relationship was shown to provide one of the most useful descriptions of the heart as a pump system. This description included the pump function of the ventricle as well as the interrelation between cardiac mechanics and energetics. In describing the heart only as a pump, Thévenin's network model consisting of a source of pressure with a series source resistance (or impedance) is useful in analysing the complex interactions of the equilibrium mechanism for determining cardiac output and arterial pressure, and the matching conditions under the ventriculo-arterial coupling during the ejection period for a given set of ventricular and arterial system parameters. The analytical results using this model explained previous experimental results by other investigators. It was also suggested that the ventriculo-arterial-coupled system appears to be matched. From the engineering point of view, it is desirable also for the ventricle as a pump to behave under such an optimum matching condition for delivering a maximum power to the arterial load.

Interaction between heart as a pump and artery as a load.