Inclusion Criteria:  Adult (≥ 18 years) Patients with a probable (50-90% likelihood) or highly probable (>90% likelihood) diagnosis of cardiac sarcoidosis (CS) by a multidisciplinary team meeting in a CS-specialist centre as per the WASOG criteria Patients attending outpatient clinics in a CS-specialist centre  Exclusion Criteria:  Unable or unwilling to give informed consent Unable or unwilling to give and/or complete the study questionnaires • Inability to understand written and/or verbal English