Hello,
Stress or pressure situations can cause heart burn and atrial fibrillations. Stress causes the classic 'Fight or Flight situation'. When the brain recognises a potentially dangerous situation, it increases the flow of adrenaline in the blood, readying the body to either fight the danger or flee from the danger.
It is possible that you had heart burns and palpitations even before the atrial fibrillation but never noticed it. It is also possible that your reactions to stress has increased after the diagnosis of AF. The hands going numb is also a sign of acute stress.
If you have these episodes very often, you need to discuss them with your doctor who can prescribe a drug to decrease anxiety. Acute palpitations are not good for the heart.
I hope this helps.
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Experienced in the management of Pregnancy,Infertility,Menopause and all problems in Pregnancy and Gynecology