Figure 4.

Comparisons between patients of IIM with positive and negative AMA-M2 antibodies in heart-associated indicators (independent sample t-test and χ² test). (A,B,C) shows higher systolic pulmonary arterial pressure, larger LV dimension, lower LVEF, higher percentages of patients with enlarged LA, RV, RA, and decreased RV systolic function were presented in the patients with positive AMA-M2 antibody compared with patients with negative AMA-M2 antibody; (D) shows more events of hepatomegaly, abnormal Q wave, LAFB and AF, cTnI elevation (>0.5 µg/L) and NT-proBNP elevation (>1,000 pg/L) were found in patients with positive AMA-M2 antibody. IIM, idiopathic inflammatory myopathy; AMA-M2, anti-mitochondrial antibody M2; LVEF, left ventricular ejection fraction; LV, left ventricular; LAFB, left anterior fascicular block.