Diagnosis of isolated cardiac sarcoidosis based on new guidelines.

Diagnostic yield with the new JCS guidelines was higher, with approximately 1.5-fold of the patients diagnosed with CS compared with the previous international criteria and definitive iCS accounting for approximately 20% of the whole CS cohort. In addition to 75% of the patients with sCS or definitive iCS in the updated guidelines, 10% in whom CS was not documented were also started on corticosteroids for clinical indications such as reduced cardiac function or arrhythmia.