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Video stills. Representative two-dimensional right parasternal four-chamber long-axis view of a control dog (a) and affected treated dog (b) at 15 months of age. The affected treated dog has a much larger left ventricular end-systolic diameter and reduced ejection fraction when compared with the control. LA, left atrium; LV, left ventricle; RA, right atrium; RV, right ventricle.
