Effect of metoprolol on myocardial function and energetics in patients with nonischemic dilated cardiomyopathy: A randomized, double-blind, placebo-controlled study

Eric J. Eichhorn, Christian M. Heesch, James H. Barnett, Luis G. Alvarez, Steven M. Fass, Paul A. Grayburn, Barbara A. Hatfield, Lucille G. Marcoux, Craig R. Malloy