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..
In atrial fibrillation (AFib), the heartâs two small upper chambers (atria) donât beat the way they should. Instead of beating in a normal pattern, the atria beat irregularly and too fast, quivering like a bowl of gelatin. Itâs important for the heart to pump properly so your body gets the oxygen and food it needs. What Is Atrial Fibrillation? Cardiovascular Conditions Your heart has a natural pacemaker, called the âsinus node,â that makes electrical signals. These signals cause the heart to contract and pump blood. With atrial fibrillation, random electrical activity interrupts the normal conduction rhythm. This prevents the atria from properly contracting.