appear to arise from the membranous septum, although they may arise from a thickened muscular ridge slightly further down into the ventricle
Attachments to the anterior leaflet of the mitral valve are frequently seen.
- rare in newborns and infants.
- progresses over time s
- ?acquired
- ? due to thickening and scarring from turbulence caused by an underlying LVOT abnormal architecture.
- ?acquired