Ventricularization of right atrial wave form in amyloid restrictive cardiomyopathy

Two patients with biopsy-proven amyloid restrictive cardiomyopathy were presented. Both cases showed ventricularization of an elevated right atrial pressure wave form in absence of tricuspid regurgitation. Possible explanations for this finding as well as its clinical implications are discussed. This observation indicates that ventricularization of right atrial pressure wave form could be a useful hemodynamic sign in amyloid restrictive cardiomyopathy in absence of tricuspid regurgitation. Furthermore, such a finding does not seem to be specific for tricuspid regurgitation.