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[The best of 2001. Valve diseases]
G Hanania1, J P Maroni, P L Michel
1Service de cardiologie, centre hospitalier Robert Ballanger, 93602 Aulnaysous-Bois.
Insights
Valvulopathy research in 2001 explored aortic and mitral valve diseases, their risk factors, and surgical outcomes. Advances included prognostic approaches for aortic stenosis and insights into bioprosthetic valve degeneration.
Area of Science:
- Cardiology and Cardiovascular Surgery
- Pathology and Pathophysiology
- Medical Research and Development
Context:
- 2001 publications reviewed valvulopathies, encompassing aortic and mitral valve diseases.
- Research highlighted links between aortic sclerosis/stenosis and cardiovascular risk factors, noting inflammatory lesion analogies to atherosclerotic plaques.
- Studies examined serum lipid levels in patients undergoing valvular replacement for stenosis versus insufficiency.
Purpose:
- To assess pre-operative prognostic approaches for advanced aortic stenosis with left ventricular dysfunction using stress echocardiography.
- To evaluate the long-term performance and degenerative mechanisms of biological aortic prostheses (homografts, stented, stent-less).
- To investigate the prognosis and repair strategies for ischemic mitral regurgitation and the efficacy of mitral valve repair techniques.
Summary:
- New work supports the relationship between aortic sclerosis/stenosis and cardiovascular risk factors, confirming lesion analogies to atherosclerotic plaques.
- Prognostic approaches for advanced aortic stenosis with left ventricular dysfunction are improving with stress echocardiography.
- Research confirms excellent long-term results for mitral valve repair, including minimally invasive approaches, and discusses anticoagulation strategies for prostheses.
Impact:
- Findings aid in better pre-operative prognostic assessment for aortic stenosis patients.
- Controversies regarding bioprosthetic valve degeneration (immunological vs. degenerative) have implications for patient management and potential immunosuppressive treatments.
- Understanding ischemic mitral regurgitation and optimizing mitral valve repair techniques improves patient outcomes and quality of life.
Abstract:
The publications in 2001 regarding valvulopathies have concerned all sectors of this pathology. Aortic valvulopathies are the object of new work supporting the relationship between aortic sclerosis or stenosis and cardiovascular risk factors. They confirm the analogy between lesions of inflammatory origin observed on calcified valves and atherosclerotic plaques (Mohlner). They find higher rates of serum lipids in the case of valvular replacement for stenosis than for aortic insufficiency albeit in an older population (Novaro). Monin shows the possibility of a better pre-operative prognostic approach for advanced aortic stenoses at low transvalvular gradient with left ventricular dysfunction, for which the post-operative results are better when low dose stress echocardiography has shown the existence of a contractile reserve. For the results of aortic surgery with biological prostheses it is widely reported that they behave as homografts (O'Brien), stented heterografts (Puvimanasinghe) or stent-less (Hubaut). A controversy exists on the subject of the degenerative mechanism of bioprostheses between the supporters of the immunological hypothesis (Human) and those of the purely degenerative hypothesis (Mitchell). This controversy is far from being insignificant because the infectious or other risks run by patients with bioprostheses are conceivable with the addition of an immuno-suppressant treatment. Among the mitral valvulopathies, insufficiencies with an ischaemic origin have a harmful effect on the long term prognosis even for medium leaks (Grignoni). As for the method of repairing these ischaemic leaks, consensus has not been reached between the proponents of exclusive revascularisation, plasty or replacement (Mickleborough, Otsuji). The quality of the very long term results for mitral plasty by Carpentier's technique for rheumatic mitral insufficiency (Chauvaud) or non-rheumatic (Braunberger, Mohty) is confirmed, especially for the latter. Its feasibility by a minimally invasive approach is reported (Schroeyers). Anticoagulation for prostheses remains one of the challenges for valvular surgery. The addition of a platelet anti-aggregant is not accepted by all, due to the increased haemorrhagic risk. A meta-analysis of 2,199 operations seems in favour of this addition if the dose is weak (Massel). It's a question of an attitude having become normal practice across the Atlantic, but not in Europe (Englberger).