title: The inside-out electrocardiographic stress test: a view from the left ventricular cavity.
abstract: A new method is described for measuring the unipolar left ventricular cavitary electrogram by means of a standard pigtail ventriculography catheter. Experiences with this technique in 30 patients are described with particular reference to changes in the S-T segment of the cavitary electrogram during cardiac stress by atrial pacing. This method allows convenient recording of His bundle potentials from the left ventricular outflow tract in most patients.
mesh_terms: D000787:Angina Pectoris / Q000175:diagnosis; D002036:Bundle of His / Q000503:physiopathology*; D006328:Cardiac Catheterization; D003327:Coronary Disease / Q000175:diagnosis; D004562:Electrocardiography / Q000379:methods*; D006329:Heart Conduction System / Q000503:physiopathology*; D006331:Heart Diseases / Q000175:diagnosis; D006352:Heart Ventricles / Q000503:physiopathology*; D006801:Humans