The author points out that health care systems must respond to the changing health needs of an aging population. It emphasizes the growing importance of non-communicable chronic diseases in old age. He states that until now, medicine has mainly focused on "adding years to life". According to the article, it is now necessary to focus on "adding life to years", that is, on quality of life. The text calls for a reassessment of the functioning of health systems in this new context. It proposes a transition to a "two-dimensional" health system that takes into account both length and quality of life. The purpose of this approach is to better adapt health care to the needs of older people with chronic diseases.