@larry1844 thank you so much for this--very good idea on the cardiologist appointment--I will try all of those ideas!
As for my diet & exercise--I jog/run 6 miles every day and have for 35 years, I'm vegan and really clean with my diet. They did genetic testing for me because I have a strong family history of heart disease. I'm low weight (BMI 18) and physically fit, but have a lot of metabolic issues (hypothyroid, prediabetes, a few others) that are all genetic. So, I really don't have more I can do. My HDL is great (96) but my LDL and triglycerides have been borderline for years. So now with the low EF, my endocrinologist felt it's time for the statin. He's my best doctor, so I'm willing to try--just planning on half-dose and 2x/week and then will see if it's helped at all!