Abstract:M-mode and two-dimensional echocardiographic studies, with and without contrast injection, were performed in 14 adult patients with clinical and radiological signs of atrial septal defects. Two-dimensional contrast echocardiography was found to be the most sensitive technique, allowing a definitive diagnosis to be made noninvasively in 12 patients (86%) of those patients studied. M-mode contrast echocardiography demonstrated an atrial shunt in 6 patients (43%). Regular two-dimensional echocardiography produced… Show more
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