According to the information you have provided, your mother as some minor occlusions of the septal wall. The septum wall is the wall tha separates the left and right side of the heart, and if serious could cause an impedement to heart wall movement and the heart's ability to adequately pump blood into circulation.
There isn't any treatment for immediate treatment and almost always not necessary, but proper diet, exercise, or medicaiton if necessary to reduce lippids to help prevent plaque buildup.
Thanks for the question, and if you have any further questions or comments you are welcome to respond. Take care,
Ken .