Advanced Cardiac Amyloidosis Associated with Normal Interventricular Septal Thickness: An Uncommon Presentation of Infiltrative Cardiomyopathy

Cardiac amyloidosis can uncommonly present with normal IVS thickness despite significant myocardial dysfunction. The prognosis of these patients is as poor as those with increased IVS thickness. Amyloidosis should be considered in the differential diagnosis of patients with cardiomyopathy and reduced LVEFs despite normal IVS thickness.