A little background about me and my condition:
26 years old, been active for most of my conscious life but ever since early teen years I've noticed that during intense exercises (for example fast paced basketball drills) my heart tends to beat very fast. Well that didn't bother me, what I disliked was significant drop of performance as a result. I usually wrote it of on being out of shape at the give time. So the years went by and as I naturally added some weight as I grew older "heart pounding" became more of an issue. I always tried to do my best while doing various sports(basketball, tennis, running, cycling, xc skiing) and activities but because of the condition I just couldn't keep up with my peers. I did see my doctor and did ECG test, but when I am at rest nothing abnormal shows up. Revelations came when about a year ago I bought a heart rate monitor(Polar M400 to be precise). It gave me a clearer idea about what was happening and when...
I normally run with HR of 150-160 bpm, but when I exceed 170 (around my anaerobic threshold level) I get a good chance of heart rate dropping to 120 within 5 seconds and then jumping all the way up to 220 where it lingers until I stop all activities and stay in squatted position (helps drop the HR to below 100 in about 10-20 seconds)... Another problem occurred when for example I finished my run (avg. HR 155) and dropped pace to quickly my HR would race over 200...
So basically I figured that in order to avoid this tachycardia I have to exercise moderately within certain HR bpm and avoid dropping pace to rapidly... well that's a bugger as I highly enjoy entering local cycling and running marathon races. I could say goodbye to basketball as I simply couldn't push for long at 220 bpm (as I understand lack of oxygen to the brain would make me quite dizzy)...so I tried to seek help once again.
Seeking help:
I got good health insurance from work so i went to see so called sports doctor and got a veloergometry test load test. The test confirmed my issue and doctor said I have a SVT. I also did Echocardiography and another ECG with good results. I was recommended to visit an cardiologist who quickly suggested ablation procedure. I quickly agreed as that seemed to be the only logical solution.
I had procedure on june 6th, 2016 and during that I was more specifically diagnosed with AVNRT and as I understand the "slow" pathway got fixed. Doctor said that he managed to provoke SVT and fix the cause. After the fix he couldn't provoke it anymore. I was told that in cases like mine there is only 5% chance that I would need a secondary procedure. I thought the doctor would give a detailed info how to resume physical activities, but all he said was "wait 1 week until scars in the groin area heel and go do whatever you want"... well only from this website I found out that you actually need months for heart to recover... but before that I tried a mtb cycling ride with gradually increasing workload. At first I felt very good even at high bpm, but about 15-20 min in I felt discomfort in heart region, general tiredness and my heart rate raced up to 220... that's when I figured that going full throttle so soon isn't a sound idea...
So finally the QUESTION:
Could someone please explain/comment how fast and at what rate can I resume some exercises? I figured maybe I can ride some base training miles in HR 120-130 bpm, bur are there any other guidelines. Could my post procedure SVT occurrence be simply a result of fully unhealed heart? Any replies would be highly appreciated! Feel free to ask additional questions for me to elaborate my situation !