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Published on: February 4, 2021
Calcific aortic stenosis: an update
Nalini M Rajamannan1, Robert O Bonow, Shahbudin H Rahimtoola
1Bluhm Cardiovascular Institute, Chicago, IL, USA.
Insights
Calcific aortic stenosis, a leading cause of valve replacement, is increasingly linked to a degenerative process similar to vascular atherosclerosis. This shift highlights new therapeutic avenues for this common elderly condition.
Area of Science:
- Cardiology
- Gerontology
- Pathophysiology
Background:
- Calcific aortic stenosis (CAS) is the primary indication for surgical valve replacement in the US and Europe.
- The incidence of CAS is rising due to an aging global population.
- Historically attributed to rheumatic heart disease, CAS is now predominantly linked to degenerative mechanisms.
Purpose of the Study:
- To review the current understanding of calcific aortic stenosis pathophysiology.
- To explore risk factors, cellular mechanisms, and diagnostic approaches.
- To discuss emerging medical therapies for degenerative aortic valve disease.
Main Methods:
- Literature review of recent studies on aortic valve disease.
- Analysis of the shift in etiology from rheumatic to degenerative causes.
- Comparison of CAS pathophysiology with vascular atherosclerosis.
Main Results:
- Evidence suggests CAS shares pathophysiological pathways with vascular atherosclerosis.
- The understanding of CAS has evolved from passive calcification to an active, complex process.
- This evolving understanding opens possibilities for novel therapeutic strategies.
Conclusions:
- Degenerative aortic stenosis is a growing concern in aging populations.
- The disease mechanism is increasingly understood to mirror atherosclerosis.
- Future treatments may target pathways similar to those used for vascular diseases.
Abstract:
Calcific aortic stenosis in the elderly is the number one cause of surgical valve replacement in the US and Europe. The incidence of calcific aortic stenosis is increasing as the general age of the population increases. For many years, rheumatic heart disease was the main cause of aortic valve disease. Over the last half century, however, there has been a change from a rheumatic etiology to a 'degenerative' mechanism because of the increase in access to health care in developed countries and the increasing age of the population in the US and Europe. For many years 'degenerative' aortic stenosis was thought to be caused by the passive accumulation of calcium on the surface of the aortic valve leaflet. Recent studies have demonstrated, however, that the etiology of aortic valve disease has a similar pathophysiology to that of vascular atherosclerosis, and that the treatment of this disease could be similar to that of chronic vascular atherosclerosis. This Review will discuss our current understanding of the pathophysiology, risk factors, cellular mechanisms, diagnosis and finally, future medical therapies for calcific aortic stenosis.
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