CGM Use in Heart Failure

Freestyle Libre 2 consists of a sensor applied to the back of the upper arm. The sensor is a penny-sized flexible filament placed beneath the skin's surface to measure interstitial fluid. This sensor is applied utilizing a sensor applicator provided in the packaging. The sensor continuously reads interstitial glucose readings every minute and syncs with the Freestyle View app. The hypoglycemia alarm will be set to \< 80 mg/dl (for prevention of low blood glucose levels). Participants will be instructed to provide 15 grams of carbohydrates in response to a hypoglycemia alarm. The hyperglycemia alarm will be set at 300 mg/dl. Participants will call the research team if they experience repeated episodes \> 300 mg/dl (more than 2 episodes in a single day or 2 or more episodes in consecutive days). The research team will instruct the participant to check with their physician for a possible new insulin regimen, but they will be allowed to remain in the study.

Standard of care point-of-care (POC) capillary blood glucose (BG) monitoring will be done before meals and bedtime daily during the study participation for up to 3 months.