Permanent cure for Atrial fibrillation.

I was diagnosed with AF and grave hyperthyroid on 21.12.2020 ( over 2 years ago). I pulse rose to 150 when i woke up from sleep. I rushed to Medanta hospital in Gurugram ( near Delhi).  They did all tests like ecg, holter, thyroid and i was told i have grave hyperthyroid which caused high pulse and AF. My thyroid is in normal range since last 2 months. I am taking blood thinner Rivaban 15 mg daily once a day for 2 years. Also taking dilzem SR 90 mg twice a day, eritel 40 mg twice a day and neomarcazole for hyperthyroid. My problems now: Most of the days bp n pulse remains in normal range like 105/65 and pulse around 60 to 67. But i gets episodes of high bp pulse in a gap of 4 month,  2 months and sometimes after 15 days. Today morning while sleeping pulse rose to 113 and bp was 143/88. In November pulse rose to 118 and bp was  154/98. Question 1: is my bp n pulse episodes problem linked with Grave hyperthyroid as both were diagnosed together two years back Question 2: Is AF a life l