Cardio Scan LAD-346

I just had an ultrafast cardio scan. My results were: Left Main = 0, Right Coronary = 0, Left Anterior Decending = 346, Circumflex = 0. I’m 66 and have been on a statin (crestor 5 mg and ezetimibe 10 mg) for a long time. Last lipid panel shows total cholesterol 183, HDL = 69, LDL = 83, triglycerides = 226. Blood pressure 114/76.
I’m really concerned as I wait to hear from my doctor. I exercise regularly but as I read this is the “widow maker”.
Can anyone shed light on this.