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Vascular function curve: confusion, clarification and new insights

Michael Y Ko1, Xiaoqi Yang2, Suzan Kamel-ElSayed1

  • 1Department of Foundational Medical Studies, Oakland University William Beaumont School of Medicine MI, USA.

American Journal of Cardiovascular Disease
|September 23, 2022
PubMed

Insights

This study clarifies confusion surrounding the vascular function curve (VFC) in cardiovascular physiology. It differentiates VFC types and right atrial pressure (RAP) roles to improve interpretations when combined with cardiac function curves (CFC).

Area of Science:

  • Cardiovascular Physiology
  • Hemodynamics
  • Systems Biology

Background:

  • The vascular function curve (VFC) illustrates the relationship between venous return (VR) and right atrial pressure (RAP).
  • Inconsistent definitions exist regarding whether RAP or VR is the independent or dependent variable in VFC.
  • This ambiguity complicates interpretations when VFC is integrated with the cardiac function curve (CFC).

Discussion:

  • This article traces the origin of inconsistencies in VFC definitions.
  • It differentiates VFC into two types based on their construction.
  • It clarifies the roles of RAP as both an independent and dependent variable.

Key Insights:

  • Distinguishing between different VFC constructions resolves definitional conflicts.
  • Understanding RAP's dual role (IV/DV) is crucial for accurate VFC analysis.
  • Consistent VFC and CFC integration enhances understanding of cardiovascular dynamics.

Outlook:

  • Resolving VFC inconsistencies will lead to more accurate hemodynamic modeling.
  • This work provides a foundation for novel insights into cardiovascular control mechanisms.
  • Further research can explore the clinical implications of standardized VFC and CFC integration.

Keywords:
Vascular function curveafterloadcardiac cyclecardiac function curvepreloadright atrial pressure

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