Yoshida Y, Tomoe A, Fukuda M, Yamaki S
Tohoku J Exp Med. 1979 Feb;127(2):199-200. doi: 10.1620/tjem.127.199.
The ratio of the right ventricular preejection period to the right ventricular ejection time was calculated from the echocardiogram of the pulmonic valve before and after inhalation of a high concentration of oxygen in pulmonary hypertensive patients. The results showed that this non-invasive method could differentiate pulmonary vascular disease from non-pulmonary vascular disease and hence useful for evaluating the change of the pulmonary vascular bed in the pulmonary hypertensive patients.
在肺动脉高压患者吸入高浓度氧气前后，通过肺动脉瓣超声心动图计算右心室射血前期与右心室射血时间的比值。结果表明，这种非侵入性方法可区分肺血管疾病与非肺血管疾病，因此有助于评估肺动脉高压患者肺血管床的变化。
