I will weigh in on a couple of points Pmacky09 as our situations are similar. I would agree with some points made by others, but take issue with the wait times. My stenosis progressed from moderate to severe at age 59. Like you, I was otherwise healthy and I good shape. I also live in BC.
Firstly, severe stenosis is considered an emergent surgery in BC. My wait time form diagnosis to surgery was 8 weeks, and the only reason it took that long was that cardiac catheterization lab was backed up due to the pandemic (2021). The same day I had a call from the cath lab scheduling that procedure, I also had a call from the surgeon. Surgery was 2 days after the cath. I believe cardiac surgery wait times have improved since 2021, but I would also note that it depends a bit on where in the province you live and where you prefer to have surgery. Others may not be aware, but BC is a large province, with population concentrated in a couple of areas, so people living in remote areas may need to travel for heart surgery. Folks may also not be aware that health care in Canada is a provincial responsibility and some provinces do a better job than others. My experience is that BC does a great job with heart surgery.
If you aren’t being referred to a surgeon in a timely basis get in your cardiologist, it should happen. Don’t be afraid to advocate for what you need.
With respect to shortness of breath, I did begin to notice some changes in the last 6 months particularly. I would be short of breath very quickly when bending over. I was also acutely short of breath when I packed anything at all heavy. Theses symptoms were different from what I had experienced previously. Also, when hiking, it would take me much longer to recover after a large hill. .