title: Retrospective analysis of 300 cases of paroxysmal supraventicular tachycardia by electrophysiological transesophageal study.
abstract: OBJECTIVE
  Paroxysmal supraventricular tachycardia (PSVT) is a very frequent type of arrhythmia. Atrioventricular nodal reciprocating tachycardia (AVNRT) and atrioventricular reciprocating tachycardia through extranodal accessory pathways (AVRT) are the most common types of paroxysmal supraventricular tachycardia. We describe our experience in diagnosing these tachycardia by electrophysiological transesophageal study (ETS).
  
  
  METHODS
  Three hundred patients, 155 men and 145 women, (mean age, 37.2 +/- 16 years), with a history of palpitations underwent clinical evaluation and ETS. The clinical features of those with AVNRT and those with AVRT were compared.
  
  
  RESULTS
  Of a total of 300 patients, tachycardia was diagnosed only in 234, of which 136 (58%) had AVNRT and 98 (42%) had AVRT. AVNRT patients were older than those with AVRT (P = or < 0.004); patients with AVRT had palpitations earlier (P = or < 0.0001). Dyspnea and asthenia were the most frequent symptoms in the AVNRT patients (P = or < 0,02; P = or < 0.04). There were statistically significant differences between the two patient groups in Wencke-bach time (P = or < 0.05), ventricular-atrial (V-A) interval (P = or < 0.03) and period of induced tachycardia (P = or < 0.04).
  
  
  CONCLUSIONS
  ETS revealed important clinical and electrophysiological differences between patients with AVRT and those with AVNRT.
authors.affiliation: Department of Cardio-Thoracic and Respiratory Medicine, Second University of Naples, A.O. Monaldi, Naples, Italy. danieleamitrano@libero.it
authors.forename: D
authors.initials: D
authors.lastname: Amitrano
authors.forename: E
authors.initials: E
authors.lastname: Ammendola
authors.forename: C
authors.initials: C
authors.lastname: Cavallaro
authors.forename: L
authors.initials: L
authors.lastname: Santangelo
mesh_terms: D000328:Adult; D004594:Electrophysiology; D004947:Esophagus / Q000502:physiology; D005260:Female; D006801:Humans; D008297:Male; D012189:Retrospective Studies; D013614:Tachycardia, Paroxysmal / Q000175:diagnosis / Q000503:physiopathology*