1 AFib reduces the ability of the atria to pump blood into the ventricles, and usually causes the heart to beat too rapidly. 2  One-half million new cases of atrial fibrillation are diagnosed every year in the U.S., and billions of dollars are spent annually on its diagnosis and treatment.
noun, (used with a singular verb) 1. the branch of mechanics that deals with the motion of air and other gases and with the effects of such motion on bodies in the medium. Compare aerostatics (def 1). Origin of aerodynamics.
aerodynamics. the branch of dynamics that studies the motions of air and other gases, especially with regard to bodies in motion in these substances. See also aviation. â aerodynamic, aerodynamical, adj. See also: Atmosphere aerodynamics. The study of the flow of gases, especially air. Thesaurus Antonyms Related Words Synonyms Legend: Switch to new thesaurus . Noun: 1. aerodynamics - the branch of mechanics that deals with the motion of gases (especially air) and their effects on bodies in the flow. aeromechanics