Characterization of coherent structures in the cardiovascular system

Area of Science:

• Fluid mechanics
• Biomedical engineering
• Computational modeling

Background:

• Recent advances provide high-resolution, four-dimensional blood flow data in large vessels.
• Understanding blood flow mechanics is crucial for health, disease, and intervention evaluation.
• Complex flow patterns arise from vessel geometry and pulsatile pumping, posing characterization challenges.

Purpose of the Study:

• To present a computational method for improved characterization of blood flow kinematics in large vessels.
• To utilize Lagrangian Coherent Structures (LCS) for detailed flow analysis.
• To demonstrate the utility of LCS in understanding vascular fluid dynamics.

Main Methods:

• Computation of Lagrangian Coherent Structures (LCS).
• Application of LCS to analyze four-dimensional blood flow data in large vessels.
• Comparison with traditional flow characterization methods.

Main Results:

• LCS effectively characterize flow stagnation and separation in vascular models.
• LCS reveal mechanisms of fluid partitioning to downstream vasculature.
• LCS provide insights into stirring and mixing dynamics within blood vessels.

Conclusions:

• Lagrangian Coherent Structures offer a powerful perspective for understanding complex flow features in large vessels.
• This computational method enhances traditional approaches to blood flow analysis.
• LCS application aids in the study of vascular health, disease, and treatment efficacy.