Changes in wall thickening from baseline to low-dose dobutamine (left panel) or from baseline to follow-up (right panel) for patients treated with β-blockers (upper panel) or undergoing revascularization (lower panel). Note the similarity in regional distribution when comparing dobutamine-baseline measurements of both patient groups. In addition, note that the regional distribution is similar in response to dobutamine or β-blocker therapy. Moreover, in patients treated with β-blockers, the remote tissue contributed predominantly to overall wall thickening, whereas after revascularization the dysfunctional segments contributed most to the observed changes in systolic wall thickening. *: P ≤ 0.05 for β-blocker therapy and revascularization.