Restrictive cardiomyopathy is seen in ?

Micrograph of cardiac amyloidosis, a cause of restrictive cardiomyopathy. Restrictive cardiomyopathy (RCM) is a form of cardiomyopathy in which the walls of the hea are rigid (but not thickened). Thus the hea is restricted from stretching and filling with blood properly . Ref Harrison 20th edition pg 1576