numbness in the arm is not a serious issue when compared with the fibrillation you have suffered, the chances of immideate death is very high in fibrilliation. it may require artificial pacemaker also sometimes. numbness is not to be a factor of much importance in the said circumstances. is it realing troubling you if so in what way the numbness is troubling you and get a possible solution from the doctor. otherwise its the fibrilliation that needs to be worried,
The upper left side of my back hurts. I'm not sick. I ate a few hours ago and it was after that sometime it started feeling uncomfortable. Could it be my heart?