Atrial fibrillation (A-tre-al fi-bri-LA-shun), or AF, is the most common type of arrhythmia (ah-RITH-me-ah). An arrhythmia is a problem with the rate or rhythm of the heartbeat. During an arrhythmia, the heart can beat too fast, too slow, or with an irregular rhythm.
Detailed Synonyms for also known as in English. also known as: also known as adv. also known as so called; alias; known as; named; what they call; going by the name of; also known as; called so called adj. alias adv. known as adj. named adj. what they call adj.
Synonym Study. 1. Famous, celebrated, eminent, distinguished refer to someone or something widely and favorably known. Famous is the general word: a famous lighthouse. Celebrated originally referred to something commemorated, but now usually refers to someone or something widely known for conspicuous merit, services, etc.: a celebrated writer.