森 一博¹, 土肥 嗣明¹, 上田 稔², 山本 裕子³

Kazuhiro MORI¹, Tsuguaki DOHI¹, Minoru UEDA², Yuko YAMAMOTO³

¹岡山大学医学部小児科, ²心臓病センター榊原病院, ³水島三菱病院

¹The Department of Pediatrics, Okayama University School of Medicine, ²Center for Cardiovascular Disease, Sakakibara Hospital, ³Mizushima Mitubishi Hospital

キーワード : Cor triatriatum, Color flow mapping, Fluttering of mitral valve

A case of cor triatriatum detected by an electrocardiographic abnormality in the heart disease screening for school children was examined by two-dimensional echocardiography and color flow mapping.
Two-dimensional echocardiography demonstrated an abnormal membrane between the left atrium and the accessory chamber. Color flow mapping revealed the forward flow coming from the accessory chamber to the left ventricular inflow tract via the opening of the abnormal membrane. The peak velocity of this flow was higher in diastole than in systole. Pulsed Doppler echocardiography showed an abnormal forward flow during the slow filling phase in the left ventricular inflow tract, which was accompanied by the fluttering of the mitral valve in M-mode echocardiography.
In conclusion, color flow mapping combined with pulsed Doppler echocardiography thus proved useful in the recognition of cor triatriatum.