Responders and Non-responders in the Management of Heart Failure - Significance of Genetic Influence and Identification of Novel Informative Biomarkers

This study looks at why some heart failure patients respond well to treatment while others do not. Researchers are exploring whether genetic factors and specific proteins in the blood (biomarkers) can help predict who will benefit most from heart failure treatments. **You may be eligible if...** - You have been diagnosed with heart failure based on your symptoms and signs - You are registered in SwedeHF (a Swedish heart failure registry) - You are able to provide written informed consent **You may NOT be eligible if...** - You have donated plasma in the last month or lost more than 500 mL of blood in the past 3 months - You have had a previous bone marrow transplant from a donor (as it would affect genetic analysis) - Your doctor believes participation would put you at risk or affect the study results Talk to your doctor to see if this trial is right for you.