Hi Patrik
If it's any help and this is only from my experience I find that cardiologists are over cautious, so if your results had shown any sign at all of ARVC your doctor would be urging you not to exercise, advising beta blockers.
You have been through a tough time, have you tried relaxation techniques or exercises before bed to try and help you sleep?
My first visits to my local doctors were because I had a low iron count, was feeling dizzy, heavy legged when running etc. The iron count went up, was still feeling more tired than normal a year on, kept going back to the doctors, they just said it was because I was getting older. My times in races were getting slower and slower was feeling really breathless and dizzy. I started wearing a heart rate monitor in training and noticed heart rate would rise to 220-240. The doctors then said I should take it easy but ok to carry on training, through advice from a friend I insisted on an appointment for an exercise ecg on treadmill. While waiting for the appointment which was cancelled twice, I'd carried on training and competed in a duathlon to qualify for the world championships! The week after this race had the ecg exercise test, showed eptopics, ventricular tachycardia, they kept me in hospital for 3 weeks, put me on beta blockers, had an ablation.
The palpitations sometimes manifest when I walk upstairs,walk up hills, they seem to vary. I'm seeing my cardiologist in September as I'm having a lot more dizzy spells, my hr and blood pressure has always been very low and the beta blockers make it lower.
Regarding exercise today, this is a tough one, like you say above, your friends and family say find another hobby. It isn't that easy is it? I'm a personal trainer and a running coach for 2 running clubs so running is literally my life. At the moment I take a core class for my club, do some weights for arms, jog a 5k once a week, cycle once a week, pilates, yoga, anything to keep active, while keeping heart rate at around 100. I'm concerned as my cardiologist says with ARVC the more you work the heart muscle the more quickly the condition will worsen.
Have you worn a heart rate monitor while training/running? This is what alerted me to realise something was wrong.
Julie