I think every aging athlete should get checked out by a cardiologist. Too many die of sudden cardiac death that could be avoided. Skiers, especially at altitude, are athletes, like it or not.
I'm also in the triathlon world, where the proprietor of
the triathlon forum has long been encouraging athletes to get screened. Here's his case and screening recommendations developed with the help of really good docs:
Pacific Heart Institute in Santa Monica, CA, has opened its doors to triathletes, offering screening for heart problems at a low cost. This pilot program might be a model for the rest of America.
www.slowtwitch.com
With your murmur, I'd at least have an echocardiogram to determine if you have a bicuspid aortic valve and ascending aortic aneurysm like I used to have (along with 1-2% of the population). I now have a dacron tube for my ascending aorta and a mechanical aortic valve that ticks to remind me I'm alive.
Many world-class athletes have had the same congenital defect. Many found out incidentally, like me, before it was too late.
Are there risks to excessive endurance training? A retired pro examines the evidence and shares his story.
www.triathlete.com
Your doc is probably right that a stress test wouldn't add much given your fitness. I knocked mine out of the park, scoring in the 90th percentile for a twenty-year-old (I'm in my 50s) six months before my open heart surgery. I was still at significant risk of something very bad happening. An echo showed my aortic aneurysm and severe aortic regurgitation (leaking) that the stress test didn't indicate with my strong heart.