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Dobutamine versus dipyridamole for inducing reversible perfusion defects in chronic multivessel coronary artery stenosis

^* Cardiovascular Imaging Center, the Cardiovascular Division, University of Virginia, Charlottesville, Virginia, USA

View larger version (17K): [in a new window]   Figure 1 Relationship of the ratio of myocardial blood flow (MBF) between abnormal and normal beds (those with transmural MBF reserve of <3 and 3, respectively, x-axis) during dipyridamole (filled circles) and dobutamine (open circles) versus ratio myocardial blood volume (A) from the two beds (y-axis).

View larger version (15K): [in a new window]   Figure 2 Relationship between radiolabeled microsphere-derived myocardial blood flow (MBF) reserve (x-axis) and myocardial contrast echocardiography-derived A reserve (y-axis) in the presence of dipyridamole (filled circles) and dobutamine (open circles).

View larger version (15K): [in a new window]   Figure 3 Relationship between radiolabeled microsphere-derived myocardial blood flow (MBF) reserve (x-axis) and myocardial contrast echocardiography-derived ß reserve (y-axis) in the presence of dipyridamole (filled circles) and dobutamine (open circles).

View larger version (17K): [in a new window]   Figure 4 Relationship of the ratio of myocardial blood flow (MBF) between abnormal and normal beds (those with transmural MBF reserve if <3 and 3, respectively, x-axis) during dipyridamole (filled circles) and dobutamine (open circles) versus ratio of ß from the two beds (y-axis).

View larger version (17K): [in a new window]   Figure 5 Relationship of the ratio of myocardial blood flow (MBF) between abnormal and normal beds (those with transmural MBF reserve if <3 and 3, respectively, x-axis) during dipyridamole (filled circles) and dobutamine (open circles) versus ratio of the product A·ß from the two beds (y-axis).

View larger version (15K): [in a new window]   Figure 6 Relationship between radiolabeled microsphere-derived myocardial blood flow (MBF) reserve (x-axis) and myocardial contrast echocardiography-derived A·ß reserve (y-axis) in the presence of dipyridamole (filled circles) and dobutamine (open circles).