MR tagging法を用いた疾患心における心収縮性の力学的評価

概要

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The myocardial wall motion of the human left ventricles during the systole was investigated using the magnetic resonance tagging technique. Subjects were ten normal volunteers, eight patients with hypertrophic cardiomyopathy (HCM) and seven patients with hypertensive heart disease (HHD). The cardiac contractility was evaluated by the minimum principal strain in the cardiac short-axis plane, which is one of the eigenvalues of the strain tensor and which describes the maximum contraction. The results showed that the magnitudes of the minimum principal strains in local regions of the patients with HCM significantly decreased compared with those of the normal volunteers, and that the difference of the cardiac contractility between the patients with HCM and the patients with HHD was reflected on the minimum principal strains. This study may suggest that the minimum principal strain could be an alternative effective index for the quantitative evaluation of the cardiac contractility.
社団法人日本機械学会の論文
1999-10-25