Right Ventricular Outflow Tract Obstruction Caused By A Foreign Body Granuloma Originating From A Dacron (R) Graft 30 Years After Transannular Patching

A 43-year-old man with a surgical history of atrial septal defect (ASD) patch closure and transannular right ventricular outflow tract (RVOT) reconstruction using a Dacron ® patch 30 years ago visited our hospital due to dyspnea on exertion (NYHA class II), which started 4 months prior to presentation.