I am not sure I should read these studies since many leave only questions. But for what it is worth, it seems AF and BP are not what doctors generally believe. Below is one statement in the study. Of course more study is required for any treatment to be changed.
" We thought this might hold true for patients with AF, because they are different from the general population and from hypertensive patients. We thought it might have clinical implications because most of the medications used for rate control and rhythm control also lower BP. By giving more and more medications, are we helping the patient or are we actually harming the patient?”
The summary of the study is on this site.