GLP1R and hydrops fetalis: The magnitude of the association between higher heart rate (>70 b.p.m.)and GLP-1 RA use was greater in HFrEF vs. HFmrEF, with the association not being statistically significant in HFpEF (P-value for interaction: 0.019); anticoagulant use was associated with a higher use of GLP-1 RA only in HFpEF (P-value for interaction: 0.035); registration after the release of the 2019 guidelines was associated with a higher use of GLP-1 RA in all HF classes, although significantly more in HFmrEF and HFpEF than in HFrEF (P-value for interaction <0.001).