Good Questions ... My suggestion, next appointment with your Cardiologist, Ask Her/Him those questions.
At my last appointment with my Cardiologist his Asst. mentioned to me he's commented, "Well we know She'll come in here with a Lot of Questions, & some of them have been Provocative. (I think she was referring to when I asked him, "Since 2021 when 'everyone' was getting Covid Vaccines, have you noticed an Influx of Cardio-A-Fib Patients?"
When I asked him, he paused a L-o-n-g minute then answered, "Very Interesting Question, it hadn't occurred to me but I'd say Yes, it Does seem as though we're busier now than we were before."
You might be interested in asking Your Cardiologist this same question Just To See What sort of answer you get.