Deprescribing Beta-Blockers in Elders With Heart Failure With Preserved Ejection Fraction (DEPRESCRIBE-HFpEF)

The goal of this study is to learn whether stopping beta-blockers can help older adults with heart failure with preserved ejection fraction (HFpEF) feel better and function better. This study will test whether "deprescribing" or stopping these medications in a careful, guided way can improve symptoms and quality of life. Participants will be randomly assigned to one of two groups: Deprescribing group: Beta-blockers are gradually reduced using capsules that contain decreasing doses. Usual care group: Beta-blockers are continued at the usual dose in look-alike capsules. All participants will: * Take study medicine for about 4 months * Have their blood pressure and heart rate monitored * Complete regular phone calls and questionnaires about how they are feeling This study does not involve any experimental medication. Participants active involvement in the study will last approximately 4 months. During these 4 months they will have 8 scheduled telephone visits.