Breast Cancer and Atrial Fibrillation Share Common Risk Factors

A new international study published in the *Journal of the American Heart Association* has identified a significant association between alcohol consumption, smoking, and two major health conditions—breast cancer and atrial fibrillation/flutter—in women aged 55 and older. The research, which analyzed data from multiple regions across the globe, found that women in this age group who reported regular alcohol use or current smoking had higher rates of both breast cancer diagnoses and episodes of atrial arrhythmias compared with non‑users.

The investigators examined health records and lifestyle surveys from a diverse cohort encompassing North America, Europe, Asia, and Oceania, adjusting for known confounders such as body mass index, physical activity, and comorbidities. Results indicated that alcohol intake was linked to a 12‑15 % increase in breast cancer risk and a 9‑11 % rise in atrial fibrillation/flutter incidence, while smoking was associated with a 20‑25 % elevation in breast cancer risk and a 14‑18 % increase in arrhythmia occurrence. The authors suggest that these findings underscore the importance of targeted preventive strategies and lifestyle counseling for older women to mitigate the dual burden of cancer and cardiovascular disease.