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Mitral valve reserve in double-orifice technique: an exercise echocardiographic study
Eustachio Agricola1, Francesco Maisano, Michele Oppizzi
1Division of Non-Invasive Cardiology, San Raffaele Hospital, IRCCS, Milan, Italy.
The Journal of Heart Valve Disease
|October 3, 2002
Summary
Double-orifice mitral valve repair using the edge-to-edge technique does not cause obstruction or affect hemodynamics during exercise. This study confirms the safety and efficacy of this mitral valve repair method.
Area of Science:
- Cardiology
- Cardiac Surgery
- Echocardiography
Background:
- The edge-to-edge technique is employed for mitral insufficiency, but concerns exist regarding potential functional mitral stenosis.
- Evaluating valve function and hemodynamics post-double-orifice mitral valve repair is crucial.
Purpose of the Study:
- To assess the hemodynamic effects and valve function after double-orifice mitral valve repair during exercise.
- To investigate the potential for induced mitral stenosis following this repair technique.
Main Methods:
- Exercise echocardiography was performed on 30 patients post-double-orifice mitral valve repair.
- Measurements included mitral valve gradients, planimetric valve area, stroke volume, pulmonary artery pressure, heart rate, and blood pressure at rest and peak stress.
- An annular prosthesis was present in 93% of patients.
Main Results:
- Physiological increases in heart rate, blood pressure, and stroke volume were observed during exercise.
- Mitral valve gradients and pulmonary artery pressure increased but remained within non-pathologic levels.
- Planimetric valve area significantly increased, indicating preserved or improved valve function.
Conclusions:
- Double-orifice mitral valve repair, even with ring annuloplasty, does not lead to mitral valve obstruction.
- The procedure preserves normal valve hemodynamics and reserve during physical exertion.
- This technique is a safe and effective option for treating mitral insufficiency.