PA and lateral chest radiographs of an 80-year-old woman show an inverted "C"-shaped calcification over the heart in a characteristic location of the mitral valve.
Facts: Mitral Annulus Calcification
- Noninflammatory chronic degenerative process
- Mitral valve ring (annulus) may calcify in older individuals (>60 years)
- Women more common than men
Pattern on Imaging
- Small calcium forms in or below mitral annulus at junction between ventricular myocardium and posterior mitral leaflet
- Severe disease resembles the letter J, O, or reversed C
- Little clinical significance in most cases
- May grow into ventricular myocardium to produce heart block, into mitral leaflets to cause mitral regurgitation and stenosis, through endocardium to cause small systemic emboli
- Mitral annulus calcification in the elderly is an independent risk factor of developing stroke
Miller SW, Boxt LM, Abbara S. Cardiac Imaging the Requisites. 2009.