commissural fusion
Abnormal adherence of valve leaflet edges at their commissures, resulting in restricted valve opening and stenosis.
Full Definition
Commissural fusion refers to the pathological joining of valve leaflets at their commissures, most commonly affecting the mitral or aortic valves. This condition typically results from rheumatic heart disease, congenital abnormalities, or degenerative changes. The fusion creates a narrowed valve orifice, leading to stenosis and impaired cardiac function. In surgical intervention, careful commissurotomy or valve replacement may be required depending on the extent of fusion and associated structural damage. The degree of commissural fusion significantly influences surgical approach and long-term outcomes.
Usage
Usage note: Often used in conjunction with descriptions of rheumatic valve disease; editors should ensure consistency with stenosis severity grading.
In Context
- "Echocardiography revealed severe commissural fusion of the mitral valve with a calculated valve area of 0.8 cm²." — Preoperative cardiac catheterization report
- "The surgical plan included careful commissural fusion release to preserve native valve function." — Cardiac surgery operative planning note