PREMATURE ATRIAL BEAT
\pɹɪmət͡ʃˈʊ͡əɹ ˈatɹɪəl bˈiːt], \pɹɪmətʃˈʊəɹ ˈatɹɪəl bˈiːt], \p_ɹ_ɪ_m_ə_tʃ_ˈʊə_ɹ ˈa_t_ɹ_ɪ__ə_l b_ˈiː_t]\
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Premature contractions of the heart arising from an ectopic atrial focus. With ventricular premature complexes, they represent one of the most common causes of irregular pulse. They are more apt to occur if there is atrial or conduction system disease such as left atrial enlargement in mitral stenosis. In community prospective studies, atrial premature complexes are not related to sudden death, as are ventricular premature beats in coronary disease. (From Stedman, 25th ed; Braunwald, Heart Disease, 4th ed, p679; Sokolow, et al., Clinical Cardiology, 5th ed, p472)
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Word of the day
Procollagen Proline Dioxygenase
- mixed-function oxygenase that catalyzes hydroxylation prolyl-glycyl-containing-peptide, usually in protocollagen, hydroxyprolylglycyl-peptide. The enzyme utilizes molecular oxygen with a concomitant oxidative decarboxylation of 2-oxoglutarate to succinate. EC 1.14.11.2.