<prompt> Restrictive and constrictive cardiomyopathy occurs together inRadiationAdriamycinPost cardiotomyAmyloidosis  <response>: The etiologies of RCM may be grouped into broad categories as follows: Primaryidiopathic: Endomyocardial fibrosis EMF, loeffler eosinophilic endomyocardial disease Secondary: Infiltrative, amyloidosis the most common cause of RCM in the United States, sarcoidosis , progressive systemic sclerosis scleroderma , hemochromatosis, , carcinoid hea disease, glycogen storage disease of the hea, radiationtreatment induced, metastatic malignancy, anthracycline toxicity Ref Davidson 23rd edition pg 467 