Successfully treated complete atrioventricular block with corticosteroid in a patient with cardiac sarcoidosis: usefulness of gallium-67 and thallium-201 scintigraphy. 
A 71-year-old male with sarcoidosis was followed for 6 years without steroid therapy.  He was admitted because of complete atrioventricular block.  Chest X-ray showed hilar lymphadenopathy.  Echocardiogram showed mild left ventricular hypertrophy without local wall thinning.  Cardiac sarcoidosis was diagnosed by a defect of Thallium-201 (Tl-201) imaging and abnormal uptake of Gallium-67 (Ga-67).  After the start of corticosteroid therapy, complete atrioventricular block was recovered.  Abnormal uptake of Ga-67 was improved.  Tl-201 and Ga-67 are useful to diagnose cardiac sarcoidosis, to evaluate the lesion of cardiac involvement and to estimate the efficacy of corticosteroid therapy.