The cause should be identified and, where possible, the treatment should be directed to that cause. A last resort form of treatment is heart transplant.
Endocardial fibroelastosis
Acrokeratoelastoidosis of Costa
Amyloid cardiomyopathy
Arteriosclerosis obliterans
Idiopathic giant-cell myocarditis
Coronary artery aneurysm
Eosinophilic myocarditis
Cardiac fibroma