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(A,B) Late gadolinium enhancement images by cardiac magnetic resonance imaging demonstrating dense posterolateral scar in the left ventricle. Reprinted, with permission, from Bax JJ, Gorcsan J III. Echocardiography and noninvasive imaging in cardiac resynchronization therapy: results of the PROSPECT (Predictors of Response to Cardiac Resynchronization Therapy) study in perspective. J Am Coll Cardiol 2009;53:1933-43.
