title: [Transesophageal electrophysiological study. A report of 2 cases].
abstract: Intraesophageal electrocardiography and transesophageal atrial pacing are procedures used for the study of supraventricular arrhythmias. A systematic study and integration of these two techniques on the part of the author lead him to develop a methodology for noninvasive electrophysiological supraventricular studies. The methodology is based on low-energy transesophageal atrial pacing and on a simultaneous recording system with unipolar and bipolar intraesophageal leads, bipolar transthoracic leads and body surface leads. The frequency range, amplitude and velocity of the recording play an important role. A pharmacological protocol is studied for each patient. Aspects of the methodological contribution are briefly documented for two cases. This method is a good alternative for supraventricular electrophysiologic study but is limited when compared to invasive procedures.
authors.affiliation: Departamento de Clínica Médica, Hospital das Clínicas, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Brasil.
authors.forename: M A
authors.initials: MA
authors.lastname: Seminario Origgi
mesh_terms: D000328:Adult; D006328:Cardiac Catheterization; D002304:Cardiac Pacing, Artificial / Q000379:methods; D004562:Electrocardiography / Q000379:methods; D004594:Electrophysiology; D004947:Esophagus; D005260:Female; D006321:Heart / Q000503:physiopathology*; D006801:Humans; D008297:Male; D013611:Tachycardia, Atrioventricular Nodal Reentry / Q000175:diagnosis; D013617:Tachycardia, Supraventricular / Q000175:diagnosis; D014927:Wolff-Parkinson-White Syndrome / Q000175:diagnosis
vernacular_title: Estudio electrofisiológico transesofágico. Descripción de 2 casos.