桐谷 博巳¹, 羽田 勝征², 伊藤 敦彦², 田宮 栄治², 清水 達也², 戸兵 雄子²

Hiromi KIRITANI¹, Yoshiyuki HADA², Nobuhiko ITOH², Eiji TAMIYA², Tatsuya SHIMIZU², Yuko TOHYO²

¹JR東京総合病院臨床検査科, ²JR東京総合病院循環器内科

¹Clinical Laboratory, JR Tokyo General Hospital, ²Department of Cardiology, JR Tokyo General Hospital

キーワード : Apical approach, Doppler tissue imaging, Echocardiography, Left ventricular wall motion, Mitral inflow

To investigate the longitudinal motion of the left ventricle, we performed Doppler tissue imaging and intramyocardial pulsed Doppler echocardiography in 32 normal subjects aged 39±14 (SD) years. Intramyocardial velocities were recorded at the lower or papillary, middle or chordal, and upper or mitral levels of the interventricular septum and the posterior wall in the apical long-axis view. The entire left ventricle moved toward the transducer (coded in red) during systole and moved away (coded in blue) during diastole, except for part of the apex that moved in the opposite direction. The systolic (S), early diastolic (E), and presystolic (A) waves were recorded using ultrasonography. All three waves of the septum and the posterior wall were significantly higher toward the mitral annulus. S and E waves were lower in the septum than in the posterior wall. A/E values of the left ventricular walls correlated closely with A/E values of mitral inflow as well as with age.
This new method may provide insight into assessment of global or localized left ventricular myocardial function.