Multimodality imaging of cor triatriatum dexter complicated with hypertrophic cardiomyopathy of restrictive phenotype.

Cor triatriatum dexter (CTD) is an extremely rare congenital cardiac malformation in which a membrane divides the right atrium into 2 chambers. Hypertrophic cardiomyopathy (HCM) with restrictive phenotype is also a rare cardiomyopathy. We report a case with an 18-year history of chest discomfort, fatigue and syncope following intense physical activity was finally diagnosed with CTD complicated with HCM, and the HCM is a special type, restrictive phenotype. Multimodal imaging was used to diagnose this complex disease and analyzed the main cause of her heart failure, which provided accurate evidence for clinical treatment and prognosis.