causing or capable of causing death; mortal; deadly: a fatal accident; a fatal dose of poison. causing destruction, misfortune, ruin, or failure: The withdrawal of funds was fatal to the project. decisively important; fateful: The fatal day finally arrived.
Extreme cold spells may come. Submitted by Erika (not verified) on Mon, 2009-09-28 13:40. Extreme cold spells may come from bad circulation (the blood not flowing properly) or from the thyroid (low thyroid function leads to a lower body temperature).
The normal fluctuation of hormones may trigger AFib in women. Research has found a connection between normal hormonal changes during the menstrual cycle and the prevalence of supraventricular tachycardia (SVT) in women, which may include SVT due to AFib with RVR.