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October 17, 2006Annals of Biomedical EngineeringOpen Access

Dependence of Intramyocardial Pressure and Coronary Flow on Ventricular Loading and Contractility: A Model Study

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Population

Mathematical model of coronary blood flow and intramyocardial pressure

Design

Other

Authors

PBPeter H. M. BovendeerdEindhoven University of TechnologyPBPetra BorsjeNational Patient Safety FoundationTATheo ArtsElectrophysiology

Discussion

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Implication

Contractility-driven coronary inflow modeling is hypothesis-generating; should not change clinical practice without in vivo validation.

Key Points

  • To examine the fundamental relationships between ventricular pressure, volume, wall stress, intramyocardial pressure, and coronary blood flow using a parameter-efficient mathematical model.
  • Formulated a simplified mathematical model integrating ventricular mechanics, three-dimensional wall stress, and coronary hemodynamics with a reduced parameter set.
  • Performed a parameter sensitivity analysis to evaluate how variations in contractility, coronary resistance, compliance, and sarcomere shortening kinetics influence coronary flow amplitude.
  • The model reproduced observed physiological phenomena, showing that the phasic pattern of coronary inflow remains largely independent of peak ventricular pressure, flow amplitude scales proportionally with contractility, and local wall pressure can surpass ventricular pressure.
  • Sensitivity analysis established that normalized coronary inflow amplitude is driven primarily by myocardial contractility and radial wall stress at low volumes, while remaining relatively insensitive to coronary compliance, resistance, and active fiber shortening velocity.

Structured PICO

P
Population
Mathematical model of coronary blood flow and intramyocardial pressure
I
Intervention
Parameter sensitivity analysis of a mathematical model with a limited number of parameters
O
Outcome
Relations between ventricular pressure and volume, wall stress, intramyocardial pressure, and coronary blood flow

This mathematical model demonstrates that the phasic character of coronary inflow is primarily driven by cardiac contractility rather than maximum ventricular pressure.

Cite This Study

Bovendeerd et al. (2006) studied this question.

synapsesocial.com/papers/6a70f1df35aa2c282ce2460fhttps://doi.org/10.1007/s10439-006-9189-2
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Varying elastance concept may explain coronary systolic flow impediment1989 · 137 citations
  2. 2Retrograde coronary flow is limited by time-varying elastance1992 · 45 citations
  3. 3Porous medium finite element model of the beating left ventricle1992 · 136 citations
  4. 4Effect of ventricular contraction, pressure, and wall stretch on vessels at different locations in the wall1997 · 29 citations
  5. 5Distribution of the Coronary Blood Flow across the Canine Heart Wall during Systole1974 · 144 citations