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Figure 1 Changes in coronary blood flow caused by administration of angiotensin II (Ang II) at perfusion pressures of 40, 50 and 60 mm Hg (mean values ± SEM). See text for details. a, Baseline (n = 11). b, After rapid pacing for three weeks (3W, n = 11). c, After rapid pacing for five weeks (5W, n = 5). Control indicates before administration of angiotensin II; Ang II indicates after administration of angiotensin II; LV = left ventricular mass.