While I agree they should be more clear that the main focus of the study is about rats, reading the study suggests they did link it to human patients with atria

While I agree they should be more clear that the main focus of the study is about rats, reading the study suggests they did link it to human patients with atrial fibrosis. AF patients had higher β-OHB concentrations than healthy people, which is one of the by products of a ketogenic diet. Not a direct link to KD, but certain a point of interest. I think this study is a decent case for follow up studies at the very least.