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Fall 2019 – Novel Algebraic Formulas for Guyton’s Classical Cardiac Output Venous Return Curves

Affiliations:
Project Leader: Camille Brown
camillebrown21@tamu.edu
Biomedical Sciences
Faculty Mentor: Dr. Christopher Quick, M.D.
Meeting Times:
Tuesday afternoons, time TBD
Team Size:
5 (Team Full)
Open Spots: 0
Special Opportunities:
Potential to earn co-authorship in a research publication
Team Needs:
We need people that are good at reading and analyzing research papers. Someone that is good at writing scientific research papers. Someone that is good at analyzing and understanding mathematical equations.
Description:
Guyton’s cardiac output-venous return curves have become a common tool for students, clinical investigators, and physiologists to conceptualize the complex interaction of cardiac output (CO) and venous return (VR). An algebraic formula predicting Guyton’s venous return has provided critical insights into the role of mechanical properties of the systemic vasculature. However, attempts to provide insights into Guyton’s cardiac output curve has been limited, because conventional model equations include nonlinearities that must be solved numerically. In a different approach, investigators reported that general algebraic formulas for hemodynamic variables can be derived from linearizing the equations characterizing the standard minimal closed-loop model. Therefore, the purpose of the present work is to use the linearized minimal closed-loop model to derive a general algebraic formula for the slopes and intercepts of Guyton’s CO-VR in terms of mechanical properties of the cardiovascular system. This novel tool already provides a surprising insight that, contrary to conventional belief, the slope of Guyton’s CO curve is not influenced by contractility of the left ventricle. This project will provide a novel tool for medical students and physiologists that can be used in textbooks and clinical settings.

Written by:
Jennie Lamb
Published on:
February 12, 2020

Categories: FullTags: Fall 2019

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