My mother is suffering from hypothyroidism from last few years . Her tsh level is 7 three months back . Now it is 10.14 . She is detected with corona positive 15 days back and tested negative last week . But her heart beat is sometimes showing normal and sometimes high as 120 . She can feel the high heart beat too on her own . Can I please know the reason for this high heartbeat . Is this because of any heart issues or corona or increased tsh level . T3 and T4 are normal