NPPB and chronic obstructive pulmonary disease: Participants with HFpEF who died from CV causes were older, were more likely to have RCA, and COPD prior to HF, had longer QRS duration, higher troponin and NT-proBNP levels, and lower total LA EF, compared to those who were alive at the end of follow-up (Table 1 and Supplementary Table 1).