We often find some degree of MR associated with chronic atrial fibrillation.What is the mechanism ?We also know MR begets MR.Is it because of progressive LV or LA enlargement ?
Does the Mitral annulus dilate with LA enlargement ?
July 10, 2014 by dr s venkatesan
We traditionally believe LV enlargement results in dilatation of mitral annulus from below and result in functional MR.
A lesser known concept is , LA enlargement dilating the mitral annulus from above and cause MR !
Can atrial enlargement per se dilate mitral annulus ?
When the literature is searched we have convincing proof that LA enlargement can lead to significant mitral annular dilatation and MR as well .