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Figure 1 The 12-segment model used for echocardiographic assessment of resting function and function during DE. Segments 1, 2, 6, 7 and 11 belong to the left anterior descending artery vascular territory. Segments 3 and 8 belong to the left circumflex artery territory. Segments 4, 5, 9 and 10 belong to the right coronary artery territory. Segment 12 belongs to the left anterior descending artery territory, unless it is abnormal in conjunction with other segments of the right coronary artery and not the left anterior descending artery territory, in which case it belongs to the right coronary artery territory.
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