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.
1 Known is the past participle of know. 2 adj You use known to describe someone or something that is clearly recognized by or familiar to all people or to a particular group of people. ADJ n, v-link ADJ prep, v-link adv ADJ. ...He was a known drug dealer..., He became one of the best known actors of his day...