What are the best tests to ask for for heart function?

[Karynecpa2]

History of SVT - ablated in 2012. Take 25 metropolol (been on it since 2012) and 25 losartan (started in April 17). High blood pressure but often have lower readings when calm and not in a doctors office.  Recent CRP test was 4 which is high risk for heart attack. Recent Potassium level is fine. Recent FSH is elevated indicating possible menopause. Recent symptoms - always tired, long lasting headaches that come and go. some night sweats (my body feels like its giving off heat- with chest tightness but not often. Slow heart beat - can be in the 50's at rest (goes up to 90's when moving around) and during sleep drops into the 40's. Less often I get Tachycardia in the low 100's or high 90's.  I feel best when my HR is high 60's to mid 70's. I see my cardiologist next month but I want to ask for specific tests.  I have had a stress cardio 3 years ago that was normal.  I also have high cholesterol.  Thanks for any input.