Lang-Jensen T
Acta Anaesthesiol Scand. 1981 Dec;25(6):461-2. doi: 10.1111/j.1399-6576.1981.tb01687.x.
A new method for measuring systolic time intervals (STI) is presented. By using a pulsed ultrasound Doppler-velocity-meter, which is able to differentiate the velocity signals, it is possible to pick up signals just above the aortic valve. Combining the velocity signals and an ECG, the STI can be measured. The STI measured by this method were compared with STI measured by using a phonocardiograph. The results showed no significant difference.
提出了一种测量收缩期时间间期（STI）的新方法。通过使用能够区分速度信号的脉冲超声多普勒速度计，可以获取刚好在主动脉瓣上方的信号。将速度信号与心电图相结合，就可以测量STI。将用这种方法测量的STI与使用心音图测量的STI进行了比较。结果显示无显著差异。
