title: Preexcitation.
abstract: Recent increase in our knowledge of the basic features involved in ventricular preexcitation has moved it from being a somewhat rare curiosity for which there was no cure to an important medical condition requiring careful therapeutic planning. This review summarizes a body of information concerning mechanisms, various forms of preexcitation, embryologic features, electrophysiology and special testing maneuvers, treatment, prognosis and aviation plus insurance aspects of the syndrome. A new classification of the locations of the Kent bundles in the Wolff-Parkinson-White form of preexcitation is also offered.
mesh_terms: D004554:Electric Countershock; D004562:Electrocardiography; D006329:Heart Conduction System / Q000503:physiopathology; D006801:Humans; D011379:Prognosis; D014927:Wolff-Parkinson-White Syndrome / Q000175:diagnosis / Q000503:physiopathology / Q000628:therapy