I wore a Zio patch monitor which can be worn for a month. Maybe a longer monitor would be helpful. In my area they don't use the Holter anymore.

I have a Kardia at home, which does an EKG and sends results to my phone. But since you don't have symptoms maybe a smart watch would be an option. I have never used one and don't know what it monitors.

Glad you are seeing a specialist. I had an echocardiogram and a stress test was ordered and these seem pretty standard along with the monitor.