Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2016 Sep 10;20(1):270. doi: 10.1186/s13054-016-1439-6

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© Walley. 2016

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

PMC Copyright notice

Fig. 4 — Three differently loaded cardiac cycles. The end-systolic pressure–volume points all lie on a line termed the end-systolic pressure–volume relationship (ESPVR). The slope of the ESPVR is Emax, maximum elastance. At any time during systolic contraction (e.g., 50-ms time points are shown as filled circles) a line can be drawn connecting pressure–volume points from each of the differently loaded contractions defining elastance (ΔP/ΔV) at that time point. Ventricular systolic contraction can therefore be regarded as a time-varying elastance