Elizabeth Blackwell (3 February 1821 â 31 May 1910) was the first female doctor in the United States and the first on the UK Medical Register. She was the first openly identified woman to graduate from medical school, a pioneer in educating women in medicine in the United States, and was prominent in the emerging women's rights movement.
According to Medilexicon's medical dictionary, atrial fibrillation is fibrillation in which the normal rhythmic contractions of the cardiac atria are replaced by rapid irregular twitchings of the muscular wall; the ventricles respond irregularly to the dysrhythmic bombardment from the atria..
Atrial fibrillation. Overview. Atrial fibrillation is an irregular and often rapid heart rate that can increase your risk of stroke, heart failure and other heart-related complications. During atrial fibrillation, the heart's two upper chambers (the atria) beat chaotically and irregularly â out of coordination with the two lower chambers (the ventricles) of the heart. Atrial fibrillation symptoms often include heart palpitations, shortness of breath and weakness.