三浦 拓也¹, 広瀬 一¹, 松田 暉¹, 中埜 粛¹, 黒田 修¹, 加藤 寛¹, 川島 康生¹, 有沢 淳², 佐野 哲也³

Takuya MIURA¹, Hajime HIROSE¹, Hikaru MATSUDA¹, Susumu NAKANO¹, Osamu KURODA¹, Hiroshi KATO¹, Yasunaru KAWASHIMA¹, Jun ARISAWA², Tetsuya SANO³

¹大阪大学医学部第一外科, ²大阪大学医学部放射線科, ³大阪大学医学部小児科

¹First Department of Surgery, Osaka University Medical School, ²Department of Radiology, Osaka University Medical School, ³Department of Pediatrics, Osaka University Medical School

キーワード : Single ventricle, Total cavopulmonary shunt operation, Pulsed Doppler echocardiography

Pulsed Doppler technique was utilized to determine the characteristics of blood flow pattern in two patients with single ventricle after total cavopulmonary shunt (TCPS) operation. Pulmonary arterial (PA) blood flow pattern was biphasic forward flow, similar to pulmonary venous one. In the azygos or hemiazygos vein, blood flow pattern was nearly continuous steady flow. In one patient, the ventricular inflow pattern consisted of two phasic patterns, namely rapid filling and atrial augmentation, as observed in normal subjects.
PA blood now pattern was biphasic in the patients with no pumping chamber in the right heart circulation after TCPS operation. This may be partly due to the contraction and relaxation of the left atrium and ventricle.