Although my problem was not identical to yours, I had my Class 1 suspended by the CAA some years ago for an anomaly on my ECG.
I had to undergo exrensive cardiac testing, but eventually had my licence restored after 3 months.
I found the CAA cardioloigist very supportive with every effort being made to restore, rather than to revoke, my licence.
Things can seem to drag a bit at times, which is very frustrating, but be patient and hopefully you will soon be reinstated.