Principal Investigator: Peter Wells, M.D.
Location: Baylor Heart and Vascular Hosptial
Sponsor: Baylor Heart and Vascular Hospital 
Inclusion Criteria: Patients going to the EP lab for intracardiac ablation for supraventricular tachycardia.
Exclusion Criteria: Contraindication to EP study and ablation; previous attempted ablation for AV node reentry; weight less than 30 kg; first degree AV block; patient who cannot come off antiarrhythmic drugs at the end of the procedure; prosthetic tricuspid valve; IVC obstruction/filter/thrombosis.
Contact Information: Cory White (214.820.7825)