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Wave intensity analysis in the human coronary circulation in health and disease
Sayan Sen, Ricardo Petraco, Jamil Mayet
1International Centre of Circulatory Health, National Heart and Lung Institute, 59-61 North Wharf Road, London, W2 1LA, UK. sayan.sen@imperial.ac.uk.
Insights
Coronary artery hemodynamics differ from systemic circulation due to myocardial effects. Wave intensity analysis uniquely studies coronary blood flow by distinguishing proximal and distal influences.
Area of Science:
- Cardiovascular Physiology
- Biomedical Engineering
- Hemodynamics
Background:
- Systemic arterial hemodynamics do not accurately model coronary circulation.
- Coronary pressure is influenced by both proximal and distal factors due to myocardial activity.
- Existing models fail to capture the unique pressure-flow relationship in coronary arteries.
Purpose of the Study:
- To review the principles of wave intensity analysis.
- To evaluate its application in understanding coronary hemodynamics.
- To highlight new insights gained in health and disease.
Main Methods:
- Wave intensity analysis as an investigative tool.
- Distinguishing simultaneous proximal and distal influences on coronary blood flow.
- Review of studies utilizing wave intensity analysis in coronary circulation.
Main Results:
- Wave intensity analysis effectively differentiates proximal and distal pressure-flow dynamics.
- It provides a suitable framework for studying coronary hemodynamics.
- Application reveals novel insights into coronary function in various physiological and pathological states.
Conclusions:
- Wave intensity analysis is essential for accurate coronary hemodynamic assessment.
- It offers a unique perspective compared to systemic models.
- This method advances the understanding of coronary artery function and disease.
Abstract:
Coronary artery hemodynamics are very different to that of the systemic arteries; unlike the systemic circulation, in the coronary circulation pressure is generated from both the proximal and distal end of the artery - due to the effect of contraction and relaxation of the myocardium on the microvasculature. As a result, the systemic artery hemodynamic model cannot be used to explain the pressure-flow relationship in the coronaries. Wave intensity analysis is an investigative tool that is able to distinguish simultaneous proximal and distal influences on coronary blood flow and is therefore uniquely suitable for the study of coronary haemodynamics. This review discusses the concept behind wave intensity analysis and evaluates how it has been used to characterise and provide new insights on coronary haemodynamics in health and disease.
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