Congestive Heart Failure is a chronic condition in which the heart partially or completely loses the ability to pump blood to the body. It can occur gradually in life or happen spontaneously, even in healthy people. This site has a lot of information on the condition, its diagnosis, treatments, prognosis and how it effects other major organ systems.
Prognostic implications of diastolic dysfunction in patients with acute pulmonary embolism A history of congestive heart failure has been used to determine the prognosis in patients with acute pulmonary embolism. Diastolic dysfunction is responsible for the half of congestive heart failure but has not been understood well. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4167149