Classification of connective tissue diseases with cardiovascular involvement, <i>n</i> (%).

DM/PM: polymyositis and dermatomyositis; MCTD: mixed connective tissue disease; PSS: primary Sjogren’s syndrome; RA: rheumatoid arthritis; SLE: systemic lupus erythematous; SSC: systemic sclerosis; UCTD: undifferentiated connective tissue disease. Classification of connective tissue diseases with cardiovascular involvement, n (%).