We applied CMR-FT technique to evaluate LV and LA performance in IIM patients. The main findings were as follow: (1) compared with controls, the damaged LV strain in IIM patients mainly involved global and regional LV PS in longitudinal direction; (2) LA reservoir function and conduit function were impaired in IIM patients; (3) LA volumetric parameters and function parameters showed significant difference between IIM patients and the controls. (4) Combination of global LV longitudinal PS, LAVpre-ac index and Apical LV circumferential PS can improve diagnostic accuracy. Therefore, CMR-FT can help early diagnosis of cardiac involvement of IIM patients.
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