Bing found the following results
Heart failure - Symptoms and causes - Mayo Clinic
What is Heart Failure? | American Heart Association
Congestive Heart Failure: Symptoms, Stages & Treatment
Heart Failure Signs and Symptoms | American Heart Association
Heart failure - Diagnosis and treatment - Mayo Clinic
Heart Failure - What Is Heart Failure? | NHLBI, NIH
Congestive Heart Failure: Causes, Symptoms, and Treatment …
Heart Failure | cdc.gov - Centers for Disease Control and Prevention
Heart Failure (HF) - Cardiovascular Disorders - Merck Manual ...
Heart Failure | Johns Hopkins Medicine