MMP1 and Pulmonic stenosis: And the association between MMP1 and FWS also persisted when adjusting for pulmonary stenosis, In contrast, other previously observed associations with FWS and FWSR were not sustained (the relationship between MMP1 and FWS was no longer significant after adjusting for RV dilation, and NT-proBNP was not associated with FWSR after adjusting for either RV dilation or pulmonary stenosis).