A 40 year old man is seen because of a long history of slowly developing congestive heart failure. His blood pressure is normal. Coronary artery angiography reveals no vascular disease. The white blood cell count, differential and ESR are normal. The most likely diagnosis is
A Carcinoid heart disease
B Coarctation of the aorta
C Myocardial infarction
D Constrictive pericarditits
E Cardiomyopathy