page_title: Pressure–volume loop analysis in cardiology
section_title: Physiologic relevance
hierarchical_section_title: Pressure–volume loop analysis in cardiology / PV loop analysis / Preload recruitable stroke work / Physiologic relevance
caption_attribution_description: English: Preload Recruitable Stroke Work
context_page_description: A plot of a system's pressure versus volume has long been used to measure the work done by the system and its efficiency. This analysis can be applied to heat engines and pumps, including the heart. A considerable amount of information on cardiac performance can be determined from the pressure vs. volume plot. A number of methods have been determined for measuring PV-loop values experimentally.
context_section_description: During heart failure, myocardial contractility is reduced, which decreases the slope of the PRSW relationship. Recent studies also indicate that the volume axis intercept of the PRSW relationship (not the slope) may be a better indicator of the severity of contractile dysfunction.
caption: Preload recruitable stroke work.
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