Abstract
Wave intensity analysis is a unique approach to examining coronary flow. Using principles from gas dynamics it allows the quantification and separation of forces acting to cause changes in coronary pressure and flow. This allows the individual forces acting from both the aortic and myocardial ends of the coronary artery to be measured independently even when they occur simultaneously.
A repeating pattern of six waves has been consistently identified within the coronary arteries, three originating proximally and three distally. Of these, the most clinically relevant is the backward decompression wave. This wave is formed by the re-expansion of the intramyocardial vessels that occurs in early diastole with the reversal of systolic compression.
The wave intensity profile, and in particular the backward decompression wave, has been shown to be affected by a number of pathological processes including aortic stenosis, left ventricular hypertrophy, chronic desynchronous heart failure, warm-up angina, and myocardial infarction. Interestingly, the proposed mechanisms through which they cause this impact do differ but all reflect myocardial disease/dysfunction that is appreciable and quantifiable in this unique way.
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Broyd, C.J., Parker, K., Davies, J. (2017). Wave Intensity Patterns in Coronary Flow in Health and Disease. In: Escaned, J., Davies, J. (eds) Physiological Assessment of Coronary Stenoses and the Microcirculation. Springer, London. https://doi.org/10.1007/978-1-4471-5245-3_19
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DOI: https://doi.org/10.1007/978-1-4471-5245-3_19
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