大動脈乱流の特性周波数と血圧

概要

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Turbulent velocity fluctuations were measured and analyzed in the canine ascending aorta using a hot-film anemometer. Blood flow rate and temperature were stabilizid using a special bypass technique. Blood pressure was elevated by Methoxamine infusion in some cases. When whole pooled data were grouped with peak aortic velocity, spectral bandwidth of turbulence, in terms of first and second order characteristic wavenumbers, was found to correlate with systolic aortic pressure in each of these subclassess. In a word, turbulence in the aorta developed when blood pressure was high. These phenomena were thought to be ascribed to stiffening of the aortic wall due to the elevation of systolic blood pressure. Possible relationships between the development of turbulence induced by hypertension and pathophysiological alterations of aorta were discussed.
特定非営利活動法人日本バイオレオロジー学会の論文