<原著>2方向左室映画造影法による各種心疾患の左室長径短径比の心周期性変化

概要

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Biplane left ventricular cineangiograms (90 frames/sec) were obtained in 15 patients with various heart diseases. Long diameter (L) and short diameter (D) of the left ventricle were analyzed by using an Angioanalyzer System HP 5693A. The ratio of the long diameter to the short diameter (L/D ratio) increased from 1.55±0.19 (mean±SD) at end-diastole to 1.91±0.31 at end-systole. This increase was curvilinear during systole. During early diastole, there was a further progressive increase in L/D ratio, reaching the maximum value of 2.03±0.31 at 57±36 msec after end-systole. There was a statistically significant difference (P<0.001) between the L/D ratios at end-systole and the maximum ones in the 15 cases. L/D ratio decreased rapidly after its maximum value was obtained. The progressive increase in L/D ratio during the early diastole was created by a progressive extension of the long diameter. It is suggested that the elastic recoil is playing an important role in the increase of L/D ratio at this cardiac cycle.
近畿大学の論文
1979-03-25