Dave .. I'm in a similar situation . Cardiac Cath in 2016 identified significant coronary plaques ...but the decision was made to go max medical therapy rather then stents . So Repatha , max dose Crestor and Vascepa . Adding the Repatha drove my LDL cholesterol down to 20 mg/dl at one pt !
Theres a risk of kidney damage with repeat Caths so unlikely to be done solely for research unless as you said you present with symptoms.
I would think the Kaiser at least must have a ton of Real World data following up patients like you and I and could compare those with SOC and those with SOC plus Vascepa . You have stents ? How soon did they prescribe you Vascepa after your PCI. I have 2 friends " stented " last year but their Cardiologists did not prescribe Vascepa because they were on blood thinners .