This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'Contractile Dysfunction is the dominant feature of which of the following types of cardiomyopathies \nSelect and explain. \nA. Dilated cardiomyopathy, B. Restrictive cardiomyopathy, C. Hyperophic cardiomyopathy, D. Infiltrative cardiomyopathy', 'role': 'user'}, {'content': 'Answer: A \nExplanation: 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.', 'role': 'assistant'}]