FAS and familial dilated cardiomyopathy: A similar inflammatory response was found in PCM, except that Fas/Apo-1 was also elevated;64 this marker also predicted mortality in PCM patients.65 Additionally, class G3 immunoglobulins were uniquely elevated in PCM versus DCM, implying different effects of PCM on humoral immunity.66 Although precise mechanisms are still elusive, these data have begun to influence the pharmacotherapy of DCM and PCM.67