A 46-year-old man presents with progressive dyspnea and fatigue. Echocardiography shows a dilated left ventricle, EF 28%, global hypokinesia, and functional mitral regurgitation. Coronary angiography is normal. What is the most likely diagnosis?
A
Ischemic cardiomyopathy
C
Restrictive cardiomyopathy
D
Hypertrophic cardiomyopathy