title: Cardiac involvement in mixed connective tissue disease. Pathomorphologic changes.
mesh_terms: D001145:Arrhythmias, Cardiac / Q000209:etiology* / Q000473:pathology; D006801:Humans; D008947:Mixed Connective Tissue Disease / Q000150:complications* / Q000473:pathology; D012849:Sinoatrial Node / Q000473:pathology*