Cardiac involvements in autoimmune diseases (AD) is common but underestimated and an early detection remains a clinical challenge for lacking of efficient imaging methods. The objective of the study was to investigate LV myocardial abnormalities in AD patients by multimodal cardiac imaging, including speckle-tracking echocardiology (STE), cardiac magnetic resonance imaging (CMRI) and positron emission tomography (PET).

Inclusion Criteria:

• Patient is diagnosed with autoimmune diseases, including systemic lupus erythematosus (SLE), vasculitis, dermatomyositis, sjogren's syndrome, scleroderma, rheumatoid arthritis and IgG4 associated disease.
• Patient is capable of complying with study procedures

Exclusion Criteria:

• Patient is pregnant or nursing
• Patient is complicated with congenital heart disease
• Patient had cardiac surgery before
• Patient is complicated with serious infections
• Patient is complicated with organ failure
• Patient is complicated with tumors
• Patient is diagnosed indefinitely
• Patient has been involved in other clinical trial

Patient is diagnosed with autoimmune diseases, including systemic lupus erythematosus (SLE), vasculitis, dermatomyositis, sjogren's syndrome, scleroderma, rheumatoid arthritis and IgG4 associated disease.

Patient is capable of complying with study procedures.