小村 寛¹, 川添 康郎², 田原 稔³, 鳥居 博行³, 米満 幸一郎¹, 盛本 真司¹, 田中 弘允⁴

Hiroshi KOMURA¹, Yasuro KAWAZOE², Minoru TAHARA³, Hiroyuki TORII³, Koichiro YONEMITSU¹, Shinji MORIMOTO¹, Hiromitsu TANAKA⁴

¹鹿児島市医師会病院生理検査室, ²鹿児島市医師会病院循環器科, ³中央病院循環器科, ⁴鹿児島大学第1内科

¹Section of Physiological Examination, Kagoshima Municipal Medical Association Hospital, ²Department of Cardiology, Kagoshima Municipal Medical Association Hospital, ³Department of Cardiology, Chuou Hospital, ⁴The First Department of Internal Medicine, Kagoshima Univercity

キーワード : Brachiocephalic arterial flow, Doppler echocardiography, On-line computer analysis, Exercise capacity

In the previous paper, we reported that exercise tests were performed on the basis of the brachiocephalic arterial flow with continuous wave Doppler echocardiography and changes in the peak flow velocity of blood were correlated with changes in the ejection fraction of the left ventricle. Since our approach is the continuous observation of changes in the arterial flow, the application of a personal computer is indispensable in order to analyze the vast data obtained. Therefore, by indicating on the display screen the signals of the brachiocephalic arterial flow continuously put out by the continuous wave Doppler flowmetry, during exercise, we have devoloped the software which automatically calculates the peak flow velocity. We also report having devised an evaluating system for exercise capacity which has the combined data of changes in the peak flow velocity, ST changes on the electrocardiogram and changes in heart rate, during exercise and in a recovery period.