渡辺 賢一, 相沢 義房, 細川 修, 林 千治, 矢沢 良光, 朱 敏秀, 柴田 昭

Kenichi WATANABE, Yoshifusa AIZAWA, Osamu HOSOKAWA, Senji HAYASHI, Yoshimitsu YAZAWA, Toshihide SHU, Akira SHIBATA

新潟大学医学部第一内科

The First Department of Internal Medicine, Niigata University School of Medicine

キーワード : right ventricular pressure, interventricular septum, pulmonary hypertension, non-invasive method, two-dimensional echocardiography

In order to estimate the right ventricular systolic pressure, we examined the curvature-index (Δγ) was obtained from the short axis LV two-dimensional echocardiograms in 26 patients with post-operative tetralogy of Fallot (T/F group) and 32 patients with pre-operative atrial septal defect (ASD group). 20 normal persons were used as controls. 　
The curvature-index (Δγ) was correlated well with the ratio of right to left ventricular systolic pressure (PRV/LV). The correlative coefficient between Δγ and PRV/LV was 0.94 in ASD and 0.77 in T/F groups, respectively. Δγ correlated well with Qp/Qs x PRV/LV (γ= 0.84) in ASD group. 　
We conclude that two dimensional echocardiography provides a useful index (the curature-index) to estimate the right ventricular systolic pressure non-invasively.