Being Grateful Is Good for Your Heart In a study of nearly 200 heart failure patients, those with higher levels of gratitude had better mood, better sleep, less fatigue, and less inflammation, which can worsen heart failure, than those with lower levels. This is important, as the patients in the study were in stage B heart failure, which occurs before symptoms such as shortness of breath and fatigue develop. If the disease progresses to stage C, there is a five times higher risk of death, so it's possible that a positive mindset could be life-saving in this case. Do you agree with this?