Patients with heart failure can eat fish, as fish contains a large amount of high-quality protein, vitamin B, trace elements, and minerals. Consuming fish can increase the high-quality protein the body needs, enhance the body's immunity and disease resistance. Especially for patients with heart failure, who suffer from chronic myocardial ischemia, need nutritional support. When preparing fish, it should not be made too salty, as patients with heart failure should follow a low-salt diet. If the fish is too salty, consuming it in excess could exacerbate heart failure. Preparing fish in a lighter way, such as making fish soup, can not only supplement the body's high-quality protein but also be easier to digest.