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.
Different words which have the same meaning (or similar meaning) are called synonyms. Words which have an opposite meaning are called antonyms. Words that are synonyms are referred to as being synonymous, and the state of being a synonym is called synonymy.xact Synonyms. According to one definition (attributed to Leibniz) two expressions are synonymous if the substitution of one for the other does not change the truth value of a sentence in which the substitution is made. This is a rather mathematical definition.