Chronic Heart Failure - COngestion eValuation

This study is evaluating whether lung ultrasound (a non-invasive bedside scan) can accurately measure fluid buildup (congestion) in people with chronic heart failure. It aims to see if this easy imaging tool can help doctors better monitor and manage heart failure. **You may be eligible if...** - You have been diagnosed with chronic heart failure - You are being seen in hospital for a scheduled visit or consultation (not an emergency) - You are 18 or older - You have signed the informed consent form **You may NOT be eligible if...** - You are expected to live fewer than 3 months due to another serious illness - You are on dialysis or have very poor kidney function - You have had lung surgery to remove a lobe or an entire lung - You have severe lung disease that would make ultrasound imaging unreliable (such as severe emphysema or pulmonary fibrosis) - You are pregnant, breastfeeding, or under legal protection measures Talk to your doctor to see if this trial is right for you.