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Calcific aortic stenosis and autonomic dysfunction
1Department of Medicine, Cork Regional Hospital, Wilton, Ireland.
Insights
Calcific aortic stenosis, a growing concern in aging populations, may stem from autonomic dysfunction. This dysfunction could impair the aortic valve, making it vulnerable to calcification from other stresses.
Area of Science:
- Cardiovascular Medicine
- Geriatrics
- Neuroscience
Background:
- Calcific aortic stenosis (CAS) is a prevalent valvular disease in aging populations.
- The exact etiology of CAS remains largely unknown, necessitating further research into underlying mechanisms.
- Aging of the aortic valve shares similarities with changes observed in autonomic denervation.
Purpose of the Study:
- To propose a novel hypothesis for the pathogenesis of calcific aortic stenosis.
- To investigate the potential role of autonomic dysfunction in the development of CAS.
- To explore the link between autonomic denervation and age-related changes in the aortic valve.
Main Methods:
- Comparative analysis of calcific aortic stenosis and medial arterial calcification.
- Examination of similarities between autonomic denervation and natural aging of the aortic valve.
- Review of existing literature on autonomic nervous system influence on cardiovascular tissues.
Main Results:
- Aortic valvular calcification shares pathological similarities with medial arterial calcification, where autonomic dysfunction is implicated.
- Changes observed in the aging aortic valve resemble those seen after autonomic denervation.
- Autonomic denervation may lead to withdrawal of neurotrophic influences, creating vulnerability to calcification.
Conclusions:
- Autonomic dysfunction is hypothesized as the underlying abnormality in the calcification of aging aortic valves.
- This dysfunction may predispose the aortic valve to calcification when exposed to stresses like hemodynamic trauma.
- Understanding the role of the autonomic nervous system could offer new therapeutic targets for CAS.
Abstract:
With an aging population, calcific aortic stenosis is becoming more important in medical practice. Its cause is unknown. This paper hypothesises autonomic dysfunction is the abnormality underlying the tendency of the aging aortic valve to calcify, a proposition based on 2 main lines of evidence: 1. the similarity between aortic valvular calcification and medial arterial calcification, the latter a condition in whose pathogenesis autonomic dysfunction is implicated; 2. the similarity between the changes of autonomic denervation and those of natural aging in the aortic valve, of which calcific aortic stenosis is an exaggerated form. Autonomic denervation leads to withdrawal of neurotrophic influences from cells and tissues. The resulting changes in function and in structure, it is proposed, give rise to a condition of vulnerability allowing other stresses, such as haemodynamic trauma, to result in calcification.