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Figure 1 Parasternal long-axis echocardiogram recorded at rest (left) and immediately after exercise (right) in a patient with stenosis of the left anterior descending coronary artery. Diastolic frames are on the top, and systolic frames are on the bottom. At rest, notice the normal contraction of the septum and posterior wall. Immediately after exercise, the proximal septum has normal contractility (downward pointing arrow), and there is dyskinesia of the distal ventricular septum (upward pointing arrows).