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 causes can be grouped loosely into two camps: problems outside the heart (noncardiac syncope), which account for the majority of faints, and problems in the heart (cardiac syncope).Getting to the heart of a faintFiguring out what caused a fainting spell is the best way to prevent it from happening in the future.