A recent study has revealed that frequent mobile phone usage is linked to an increased likelihood of developing cardiovascular diseases, particularly among active smokers and individuals diagnosed with diabetes. The research, highlighted in an article from the Canadian Journal of Cardiology published by Elsevier, was conducted as a comprehensive prospective cohort study.
Dr Yanjun Zhang, from the Division of Nephrology at Nanfang Hospital, Southern Medical University in Guangzhou, China, noted the pervasive nature of mobile phone usage in contemporary life, underscoring the importance of understanding its effects on health. The study suggests that mobile phone radio-frequency electromagnetic fields (RF-EMF) might disrupt the hypothalamic-pituitary-adrenal axis, trigger inflammatory responses, and promote oxidative stress, potentially impacting various organs, including the heart and blood vessels. Despite these indications, the direct link between mobile phone use and cardiovascular disease risk remains to be fully established.
Dr Ziliang Ye, a fellow researcher at the same institution, aimed through this study to evaluate the connection between regular mobile phone use and the emergence of cardiovascular diseases while also exploring how sleep and mental health might mediate this relationship. The findings indicated that individuals who regularly used mobile phones were at a considerably higher risk of cardiovascular diseases compared to those who did not engage in regular mobile use.
The research involved 444,027 participants from the UK Biobank who had no previous cardiovascular disease history and reported their mobile phone usage frequency between 2006 and 2010. Regular usage was defined as making at least one call per week. The researchers followed up with these participants for a median period of 12.3 years using linked hospital and mortality records to track the incidence of strokes, coronary heart disease, atrial fibrillation, and heart failure. The study also examined the influence of sleep patterns, psychological distress, and neuroticism on cardiovascular health.
Dr Xianhui Qin, another co-investigator from Nanfang Hospital, elaborated on the potential mechanisms by which mobile phone use could contribute to cardiovascular diseases. He pointed out that disrupted sleep patterns and poor mental health might influence cardiovascular health through altered circadian rhythms, hormonal and metabolic imbalances, and heightened inflammation. Furthermore, chronic RF-EMF exposure could exacerbate oxidative stress and inflammation. Notably, the combination of RF-EMF exposure with risk factors such as smoking and diabetes might synergistically elevate the risk of cardiovascular conditions.
An accompanying editorial discussed the context of the study’s findings, noting that the original data collection predates the widespread adoption of modern smartphones, which are used for a variety of activities beyond making calls. This observation underscores the need for further research to understand the implications of current smartphone usage patterns on cardiovascular health, keeping the audience informed and up-to-date.
Nicholas Grubic, MSc, from the Dalla Lana School of Public Health at the University of Toronto in Canada and co-author of the editorial, commented that while the study suggests a moderate increase in the risk of developing cardiovascular diseases from mobile phone use, more definitive research with accurate measurements of usage is essential before establishing a firm link. He advocates for maintaining responsible mobile phone habits as part of a comprehensive strategy to support cardiovascular health, suggesting that individuals should consider dedicating this time to activities beneficial to heart health instead of engaging in prolonged periods of aimless browsing.
More information: Yanjun Zhang et al, Regular Mobile Phone Use and Incident Cardiovascular Diseases: Mediating Effects of Sleep Patterns, Psychological Distress, and Neuroticism, Canadian Journal of Cardiology. DOI: 10.1016/j.cjca.2024.06.006
Journal information: Canadian Journal of Cardiology Provided by Elsevier
