[Transesophageal electrophysiological study. A report of 2 cases]

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.