title: A digital timing and display unit for intraoperative mapping of cardiac arrhythmias.
abstract: An inexpensive display and timing unit incorporating a multichannel signal delay has been developed for mapping the heart during electrophysiological surgery. It provides a continuous digital readout of the time relationships between 3 intracardiac electrograms and the surface electrocardiogram. The electrograms are displayed on a storage oscilloscope with an automatic erase facility. This unit is used to locate accessory atrioventricular connections in the Wolff-Parkinson-White syndrome, to map ventricular tachycardias and to locate the bundle of His. The design has been refined during 5 years of use in over 200 operative procedures.
mesh_terms: D001145:Arrhythmias, Cardiac / Q000503:physiopathology / Q000601:surgery*; D002036:Bundle of His / Q000503:physiopathology; D003201:Computers; D003626:Data Display; D004562:Electrocardiography / Q000295:instrumentation*; D004594:Electrophysiology; D006325:Heart Atria / Q000503:physiopathology; D006352:Heart Ventricles / Q000503:physiopathology; D006801:Humans; D007432:Intraoperative Period; D013610:Tachycardia / Q000503:physiopathology; D013997:Time Factors; D014927:Wolff-Parkinson-White Syndrome / Q000503:physiopathology