[Simplified approach to ablation in atrial flutter using a single catheter electrode. Based on 70 cases].

The object of this study was to assess the feasibility, efficacy and risks of ablation of common atrial flutter using a single catheter electrode. Recent studies have shown that radiofrequency ablation is effective for interrupting atrial flutter but with a variable rate of recurrence. Therefore, the search for a conduction block in the isthmic region has become the reference method for reducing the incidence of recurrence but this requires the use of costly material.

[Supraventricular tachycardia due to simultaneous conduction in the rapid and slow nodal pathways. Treatment by ablation of the slow pathway].

The authors report the case of a 70 year old woman with frequent attacks of supraventricular tachycardia resistant to antiarrhythmic therapy. The tachycardia was irregular with predominantly normal QRS complexes. Electrophysiological investigation showed dual conduction in the atrioventricular node and tachycardia was induced by atrial extrastimulus.

[Effort-induced atrioventricular block. Apropos of 62 cases].

Based on a retrospective study, we report the clinical and electrophysiological characteristics of 62 cases of effort-induced atrio-ventricular block (AVB). The diagnosis of effort-induced AVB was established by stress test and/or Holter ECG. This series consisted of 18 women and 44 men with a mean age of 64 +/- 13 years.

[Tilt test in the etiological diagnosis of syncope unexplained by electrophysiological study].

In order to determine the role of tilt testing in the aetiological diagnosis of syncope unexplained by electrophysiological investigation, the authors retrospectively studied the results of this test in 275 patients with a mean age of 64 +/- 16 years. These 275 patients were divided into two groups: group I: 43 patients with a mean age of 50 +/- 19 years presenting with vagal syncopes, group II: 232 patients with unexplained syncope, probably vagal: group IIa (120 patients, mean age: 67 +/- 15 years), sudden syncope: group IIb (112 patients, mean age: 67 +/- 13 years). The electrophysiological investigation was inconclusive in every case.