Septal Fibrosis What Is Left Atrial Enlargement And Septal Fibrosis?

What is left atrial enlargement and septal fibrosis? - septal fibrosis

I had an ECG examination
and interpretation of the statements:

"The enlargement of the left atrium
PARTITION Fibrosis "

What does this mean? I searched Google, but that does not help much
I want to listen to those who know these things ...

Hope to hear from,,,, thank you ...