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对７例房间隔膨出瘤（ＡＳＡ）进行超声心动图研究．结果发现，①Ｍ型：ＡＳＡ膜随心动周期呈规律性摆动，但不直观；②二维超声心动图（２－ＤＥ）：房间隔中间变薄（多位于卵圆窝），呈袋状膨向左或右房、或摆动于两房间，其幅度为７～１９．５ｍｍ（１１．５±４．０ｍｍ），基底径为２１．６～３４．０ｍｍ（２７．２±３．８ｍｍ），胸骨旁四腔、剑下四腔、心尖四腔和心底短轴主动脉瓣水平面可探查到，以前两切面最好；③彩色多普勒：血流于右房内绕过膨出袋进入房室口，左房在ＡＳＡ内呈回旋状，色彩暗淡。提示：２－ＤＥ是活体诊断ＡＳＡ的最佳手段，其敏感性和特异性高，应为诊断ＡＳＡ的金标准．
Echocardiographic studies of 7 cases of atrial septal alveolar tumor (ASA) were performed. The results showed that: ①M type: ASA membrane wobble regularly with the cardiac cycle, but not intuitive; ② 2-dimensional echocardiography (2-DE): thinning of the middle of the septum (mostly located in the oval fossa) Left or right room, or swing in two rooms, the range of 7 ~ 19.5mm (11.5 ± 4.0mm), the basal diameter of 21.6 ~ 34.0mm (27.2 ± 3.8mm), the sternum Next to the four cavities, four under the sword, apical four-chamber and the bottom of the heart aortic valve can be found in the horizontal plane, the best before the two sections; ③ color Doppler: blood flow in the right atrium around the bulging bag into the atrioventricular Mouth, left atrium in the ASA was convoluted, dark color. Tip: 2-DE is the best way to diagnose ASA in vivo. Its high sensitivity and specificity should be the gold standard for diagnosing ASA.