MMP1 and aortic stenosis: Importantly, we discovered a trend for a negative association between the level of histological MF and serum CITP:MMP1 ratios in the cohort as a whole (r = −0.18; p = 0.08), which could predominantly be attributed to the highly significant association in the classical LF‐LG AS group (r = −0.62; p = 0.002) (Figure 1C,D).