NPPB and chronic kidney disease: Using unsupervised clustering on all extractable ECG features from FinnGen, patients with an indication of HFpEF (filtered by left ventricular ejection fraction [LVEF] values ≥50% and N-terminal pro B-type natriuretic peptide [NT-proBNP] values >450 pg/mL) were categorized into different phenogroups and analyzed for CKD risk.