Aortic stenosis causes
|
Aortic Stenosis Microchapters |
|
Diagnosis |
|---|
|
Treatment |
|
Percutaneous Aortic Balloon Valvotomy (PABV) or Aortic Valvuloplasty |
|
Transcatheter Aortic Valve Replacement (TAVR) |
|
Case Studies |
|
Aortic stenosis causes On the Web |
|
American Roentgen Ray Society Images of Aortic stenosis causes |
|
Risk calculators and risk factors for Aortic stenosis causes |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editors-In-Chief: Claudia P. Hochberg, M.D. [2], Abdul-Rahman Arabi, M.D. [3], Keri Shafer, M.D. [4], Priyamvada Singh, MBBS [5], Mohammed A. Sbeih, M.D. [6]; Assistant Editor-In-Chief: Kristin Feeney, B.S. [7]
Overview
Aortic stenosis can be categorized under two methods of causation: acquired and congenital. Research regarding the influence of preventative therapies on causation is mixed. More research is needed specifically looking at cholesterol lowering interventions and their role on disease onset.
Aortic stenosis is most commonly caused by age-related progressive calcification of the normal tricuspid aortic valve (>50% of cases). Other causes include calcification of a congenital bicuspid aortic valve (30-40% of cases) and acute rheumatic fever (less than 10% of cases) [1].
Normal valves have three leaflets (tricuspid), but some valves have two leafs (bicuspid). Typically, aortic stenosis due to calcification of a bicuspid valve appears earlier, in the 40s and 50s, whereas that due to calcification of a normal valve appears later, in the 70s and 80s. Hypertension, diabetes mellitus, hyperlipoproteinemia and uremia may speed up the process [1].
Complete Differential Diagnosis for the Causes of Aortic Stenosis
| Cardiovascular | Congenital bicuspid aortic valve (it is twice as common in men, there is slow increase in stenosis -progressive sclerosis- and as individuals age, calcification of the aortic valve may occur and result in stenosis, this occurs in the 40s and 50s in case of bicuspid valve), atherosclerosis (normal tricuspid valve becomes rigid with age, usually stenosis develops over age 70 and it is rarely severe), rheumatic fever (slowly progressive stenosis), subacute bacterial endocarditis, age-induced calcification of normal tricuspid aortic valve 'wear and tear' (around the 7th or 8th decade of life). |
| Chemical / poisoning | No underlying causes |
| Dermatologic | No underlying causes |
| Drug Side Effect | Some medications may cause aortic stenosis, such as |
| Ear Nose Throat | No underlying causes |
| Endocrine | No underlying causes |
| Environmental | Radiation. |
| Gastroenterologic | No underlying causes |
| Genetic | No underlying causes |
| Hematologic | . |
| Iatrogenic | Radiation treatment to the chest. |
| Infectious Disease | Bacterial endocarditis where the vegetations may favor increase risk of stenosis. |
| Musculoskeletal / Ortho | No underlying causes |
| Neurologic | No underlying causes |
| Nutritional / Metabolic | No underlying causes |
| Obstetric/Gynecologic | No underlying causes |
| Oncologic | . |
| Opthalmologic | No underlying causes |
| Overdose / Toxicity | No underlying causes |
| Psychiatric | No underlying causes |
| Pulmonary | No underlying causes |
| Renal / Electrolyte | No underlying causes |
| Rheum / Immune / Allergy | rheumatic fever (slowly progressive stenosis). |
| Sexual | No underlying causes |
| Trauma | No underlying causes |
| Urologic | No underlying causes |
| Miscellaneous | No underlying causes |
Of the various forms of aortic stenosis, the calcific type is predominant. Since calcific aortic stenosis shares many pathological features and risk factors with atherosclerosis. As atherosclerosis may be prevented and/or reversed by cholesterol lowering, there has been interest in attempting to modify the course of calcific aortic stenosis by cholesterol lowering with statin drugs. Although a number of small, observational studies demonstrated an association between lowered cholesterol and decreased progression, and even regression, of calcific aortic stenosis. A large randomized clinical trial, published in 2005, failed to find any predictable effect of cholesterol lowering on calcific aortic stenosis. Researchers in 2007 study conversely demonstrated a slowing of aortic stenosis with the statin rosuvastatin.[2] More research is necessary to further clarify the specific mechanisms of disease onset and the influence of interventional methodologies on overall causation.
Congenital bicuspid valve is the most frequent form of congenital heart disease affecting approximately 1-2% of the population. 1/3rd of Supravalvular Aortic Stenosis cases are transmitted as an autosomal dominant trait as 60% of patients with supravalvular obstruction have Williams syndrome (supravalvular obstruction, intellectual impairment and facial abnormalities).
Differential Diagnosis of the Causes of Aortic Stenosis
References
- ↑ 1.0 1.1 VOC=VITIUM ORGANICUM CORDIS, a compendium of the Department of Cardiology at Uppsala Academic Hospital. By Per Kvidal September 1999, with revision by Erik Björklund May 2008
- ↑ Moura LM, Ramos SF, Zamorano JL; et al. (2007). "Rosuvastatin affecting aortic valve endothelium to slow the progression of aortic stenosis". J. Am. Coll. Cardiol. 49 (5): 554–61. doi:10.1016/j.jacc.2006.07.072. PMID 17276178.