A couple of videos by Dr Greger explaining the connection further:
(1 min) Transcript. This video explains that lower back pain may be caused by clogged arteries in the lower back area. This video has pictures of clogged arteries in lower back and spine which contributes to lower back pain.
(5 mins) Transcript. In this video, Dr Greger presents evidence that atherosclerosis (blockages in arteries) in lower back may result in back pain.
Dr Peter Rogers has written a book Ischemic spine is most common cause of back pain: How to diagnose and treat (129 pages, 2018). Book outline at Amazon:
Dr Rogers has a YouTube channel where he posts short, funny but super informative videos: Peter Rogers MD (YouTube). In addition to the videos below, see Lectures on Blood Flow by Dr Peter Rogers for more insights.
A longer, more detailed version of Dr Peter Rogers video from 2021.
Dr Greger has a couple of videos on the subject: Atherosclerosis & Lower Back Pain.