Acute Heart Failure With Preserved Ejection Fraction - COngestion Discharge Evaluation

This study is evaluating the best way to assess fluid buildup (congestion) in patients with heart failure and a relatively preserved pumping function, just before they are discharged from hospital. The goal is to prevent readmission by ensuring patients are truly ready to go home. **You may be eligible if:** - You were hospitalized for acute (sudden) heart failure - Your heart's pumping function (ejection fraction) is 50% or higher — this is called "preserved" ejection fraction - Your doctors consider you ready to be discharged - You are 18 years or older - You are enrolled in a French social security scheme **You may NOT be eligible if:** - You have a serious illness with a life expectancy of 3 months or less - You are on dialysis or have very poor kidney function - You have had lung surgery (removal of part or all of a lung) - You have severe lung or chest conditions that make ultrasound imaging unreliable (such as severe emphysema or pulmonary fibrosis) - You are pregnant, just gave birth, or are breastfeeding - You are under legal guardianship Talk to your doctor to see if this trial is right for you.