Adults who feel lonely have a significantly higher risk of developing degenerative heart valve disease, even after accounting for traditional cardiovascular risk factors and genetic predisposition. This is the central finding of a new population-based study published in the Journal of the American Heart Association.
The analysis, based on data from nearly 463,000 participants in the UK Biobank, shows that people reporting high levels of loneliness had a 19 percent increased overall risk of degenerative valvular heart disease. The risk was 21 percent higher for aortic valve stenosis and 23 percent higher for mitral valve regurgitation. In contrast, objective social isolation – defined as living alone, infrequent contact with friends or family, and lack of social or leisure activities – showed no significant association with increased disease risk.
Unhealthy lifestyle factors such as smoking, excessive alcohol consumption, physical inactivity and poor sleep patterns explained a substantial part of the link between loneliness and valve disease. Researchers emphasise that loneliness appears to be an independent and potentially modifiable risk factor.
Degenerative valvular heart disease occurs when the heart valves gradually stiffen or become leaky due to aging or other processes, impairing blood flow. According to American Heart Association statistics, valvular heart disease contributed to more than 440,000 deaths in the United States between 1999 and 2020. As populations age, the condition is becoming increasingly common.
Study author Zhaowei Zhu from Central South University in Changsha, China, noted that the findings highlight loneliness as a relevant factor in heart valve degeneration. The research is one of the first large-scale investigations to examine the relationship between perceived social disconnection and valvular heart disease in such detail.
The study followed participants for a median of almost 14 years. Loneliness was assessed at baseline through self-reported questionnaires. More than 11,000 new cases of degenerative valvular heart disease were recorded during follow-up. Individuals with both high genetic risk and high loneliness scores showed the greatest risk.
The authors point out that loneliness is not merely an emotional state but a chronic stressor that can damage cardiovascular health. They suggest that addressing loneliness could help delay disease progression, reduce the need for valve replacement surgery and lower the long-term clinical and economic burden of valvular heart disease.
Critical evaluation
The study is observational and therefore cannot prove direct causation. Loneliness was measured only at one point in time, so changes over the years were not captured. The UK Biobank cohort consists predominantly of white adults of European ancestry, which limits the generalisability of the results to more diverse populations.
Nevertheless, the findings align with previous American Heart Association research showing that perceived social isolation is linked to higher risks of heart attack, stroke and overall mortality. Experts stress that loneliness should be taken seriously as a modifiable cardiovascular risk factor, similar to smoking or physical inactivity.
The study adds to a growing body of evidence that emotional and social well-being have measurable physiological consequences. In an ageing society, where degenerative valve disease is on the rise, addressing loneliness could become an important element of preventive cardiovascular care.
Additional information
Valvular heart disease is often diagnosed late because symptoms develop gradually. Early detection through regular check-ups and greater awareness of psychosocial risk factors could improve outcomes. The authors call for further research in more diverse populations and for clinical trials testing whether interventions to reduce loneliness can actually lower the incidence of heart valve disease.
The research was published online on 15 April 2026 in the Journal of the American Heart Association.
