Hypertrophic cardiomyopathy complicated by cardiac sarcoidosis diagnosed by both the morphological abnormalities and the time course of the disease

Abstract

The definite diagnosis of cardiac sarcoidosis (CS) can be difficult because it mimics other cardiomyopa-thies and morphological abnormalities during its time course. Distinguishing CS isolated cardiac sarcoidosis from other cardiomyopathies is very important for the introduction of immunosuppressive therapy. In this study, we report a patient who had initially been diagnosed with hypertrophic obstructive cardio-myopathy (HOCM). The patient developed complete atrioventricular block (CAVB) and morphological abnor-malities, which led to his primary diagnosis being re-conducted. Moreover, we made a definite diagnose of isolated CS (ICS) based on the guideline for the diagnosis and treatment using18F-fluorodeoxyglucose positron emission tomography/computed tomography (18F-FDG-PET/CT)1) and performed tailor-made treatment including immunosuppressive therapy.