| Abstract: | A feasibility to provoke reciprocal atrioventricular tachycardias was examined in 23 patients with atrioventricular nodal tachycardia and 17 with orthodromal tachycardia in the presence of the Wolff-Parkinson-White syndrome with endocardiac and transesophageal diagnostic pacing. Atrioventricular nodal tachycardia could be induced in all 23 (100%) patients both by endocardiac and transesophageal pacing. Orthodromal tachycardia was provoked only in 9 (53%) of 17 patients by transesophageal pacing. It was generally noted that tachycardia induction required more "aggressive" regimens of transesophageal pacing than endocardiac one. Endocardiac diagnostic pacing is now a more informative technique, but transesophageal pacing requires further development. |
