佐藤 宏明¹, 金井 浩¹, 中鉢 憲賢¹, 小岩 喜郎²

Hiroaki SATOH¹, Hiroshi KANAI¹, Noriyoshi CHUBACHI¹, Yoshiro KOIWA²

¹東北大学工学部, ²東北大学医学部

¹Faculty of Engineering Tohoku University, ²Tohoku University School of Medicine

キーワード : Cardiomyopathy, Small Vibration of the Heart Wall, Ultrasonic Doppler system

To diagnose ventricular dysfunction based on acoustic characteristics of the heart muscle, it is necessary to measure small vibration signals from various parts of the ventricular walls noninvasively. We previously proposed a noninvasive method for measuring these vibrations using Doppler ultrasonography. Here we present the spectra of the small vibration signals from the heart wall that we obtained using this method. Clear differences between the resultant power spectra of the small vibration signals measured on the interventricular septum in normal individuals and those of patients who had been receiving carcinostatic medication for a long time were observed. This study thus confirms the potential usefulness of the new method proposed for measuring small vibration signals on the heart wall.