IFIH1 and dermatomyositis: Regarding all four techniques of RV-LAS (Figure 5), anti-MDA5 Ab+ DM patients had higher RV-LAS compared with HC (RV-LASIns/peri, −24.8 ± 7.8% vs. −26.8 ± 5.6%, P = 0.026; RV-LASIns/mid, −24.2 ± 7.8% vs. −27.1 ± 5.5%, P = 0.019; RV-LASLVapex/peri, −17.1 ± 4.9% vs. −20.4 ± 5.6%, P = 0.016; RV-LASLVapex/mid, −16.9 ± 4.3% vs. −19.3 ± 5.1%, P = 0.006).