Preemptive Cardiology Eval

I'm a 55yo male and have just begun my Triathlon career. I did my first sprint last week and have another one in early October. I'm in relatively good shape with a history of slightly elevated triglycerides and cholesterol. (Last blood work had all parameters within normal range.) I have a physical every 6 months and an EKG once a year (FAA requirement). I was wondering if there are any benefits to having a more extensive cardiology exam and evaluation prior to getting too heavily involved in this sport. I like to push myself and would hate to have any nasty surprises. Any cardiologists/MDs out there that care to weigh in? Thanks.