심장 사르코이드증 환자에서 바리시티닙 임상시험

The goal of this clinical trial is to learn if baricitinib in combination with a background steroid-sparing medication can treat active cardiac sarcoidosis in adults. The main question it aims to answer is: \- In patients with active cardiac sarcoidosis, does treatment with baricitinib improve cardiac sarcoidosis disease activity as assessed by changes on cardiac FDG-PET/CT? Participants will: * Take baricitinib in combination with a steroid-sparing therapy for up to 16 weeks * Visit the clinic every two to four weeks for checkups and tests * Be asked to complete questionnaires to see how they feel on baricitinib and medication diaries to record when they take baricitinib