<prompt> Contractile Dysfunction is the dominant feature of which of the following types of cardiomyopathiesDilated cardiomyopathyRestrictive cardiomyopathyHyperophic cardiomyopathyInfiltrative cardiomyopathy  <response>: Ref Harrison 19 th ed pg 1556 An enlarged left ventricle with decreased systolic function as mea- sured by left ventricular ejection fraction characterizes dilated car- diomyopathy . Systolic failure is more marked than diastolic dysfunction. Although the syndrome of dilated cardiomyopathy has multiple etiologies, there appear to be common pathways of secondary response and disease progression. 