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Figure 1 Bar graph showing the number of patients with atrial right to left shunt detected by the three different imaging modalities (FI, SHI, TEE) using venous contrast injections. ALL positives (obliquely hatched bar) = all patients with atrial right to left shunt detected with either imaging modality; FI (black bar) = fundamental imaging mode; SHI (vertically hatched bar) = second harmonic imaging mode; TEE (white bar) = transesophageal echocardiography.
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