Mitral Annular Calcification
Also written as: MAC — Mitral Annular Calcification
Age-related calcium deposition in the mitral valve annulus, commonly seen in elderly patients and potentially affecting valve function.
Full Definition
Mitral annular calcification (MAC) is a degenerative process involving calcium deposition in the fibrous ring supporting the mitral valve. This condition is particularly prevalent in elderly patients and can lead to mitral stenosis or regurgitation. MAC is associated with increased cardiovascular risk and may complicate cardiac interventions. In severe cases, it can extend into the conduction system, causing heart block, or create a substrate for infective endocarditis. The condition is often detected incidentally on echocardiography and may influence surgical planning in elderly patients requiring cardiac procedures.
Usage
Usage note: Commonly abbreviated as MAC; distinguish from mitral valve leaflet calcification.
In Context
- "Echocardiography revealed extensive mitral annular calcification with moderate mitral regurgitation." — Diagnostic report
- "The presence of mitral annular calcification complicated the surgical approach for valve repair." — Operative planning note