My cardiologist suggested that I get an apple watch to monitor my heart rate since I have an arrhythmia. I wanted to ask what model would be best/ would suffice for heart rate monitoring/fitness.

I am a medical doctor living a relatively sedentary lifestyle and is not very keen on any added features that would add to my anxiety like notifications popping up. My forearms are pretty slim and would prefer a watch that isn’t too big as well.

Your help would be much appreciated.