Browse the corpus
Walk the Even Hospital Database by book and chapter — the raw source passages that ground Ask, DDx, and the rest.
1 passage
©2013 UpToDate ® Print Email P-wave algorithm to predict anatomic origin of atrial tachycardia A P-wave algorithm constructed on the basis of findings from 130 atrial tachycardias correctly localized the focus in 93 percent. The algorithm begins with assessment of the P-wave morphology in lead V1 on the surface electrocardiogram, then utilizes other leads as needed. Neg: negative P-wave morphology; Pos: positive P-wave morphology; Iso: isoelectric P-wave morphology; CS: coronary sinus ostium; CT: crista terminalis; LAA: left atrial appendage; LPV: left inferior pulmonary vein; LS: left superior pulmonary vein; RAA: right atrial appendage; RPV: right inferior pulmonary vein; SMA: superior mitral annulus; TA: tricuspid annulus. Reproduced with permission from: Kistler, PM, Roberts-Thomson, KC, Haqqani, HM, et al. P-wave morphology in focal atrial tachycardia: development of an algorithm to predict the anatomic site of origin. J Am Coll Cardiol 2006; 48:1010. Copyright © 2006 Elsevier.