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European Heart Journal 1984 5(4):295-303;
Copyright © 1984 by the European Society of Cardiology.
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© 1984 The European Society of Cardiology

Significance of supraventricular arrhythmias induced by electrophysiologic studies

B. PERROT, F. CHERRIER and G. RAIVRE

Cardiologies A el B, CHU Brabois 54500 Vandoeuvre lès Nancy, France

Received 4 May 1983; revised 18 October 1983; .

Address for correspondence: B. Perrot, M.D., Service de cardiologie, CHU de Brabois, Route de Neufchateau, 54500 Vandoeuvre lès Nancy.

Abstract

The clinical history and the findings on Holter monitoring of 767 patients (without evidence of ventricular pre-excitation on the ECG) were compared with the results of electrophysiological studies to assess the significance of supraventricular arrhythmias induced by intracardiac study. The studies were undertaken to determine the cause of syncope, conduction disturbances or tachycardia.

In 570 patients (group 1) supraventricular arrhythmias were not induced. On Holter monitoring, 36 (6%) had evidence of supraventricular tachycardias, including atrial flutter, atrial fibrillation and paroxysmal junctional tachycardia.

In 86 patients (group 2) one atrial extrastimulus induced a paroxysmal junctional tachycardia; 79 (82%) of these patients had had spontaneous supraventricular tachycardia (SVT).

In 111 patients (group 3) another type of SVT was induced:

(a) The movement of the catheter induced atrial flutter or fibrillation in nine patients, eight (89%) of whom had spontaneous SVT.

(b) Atrial pacing at a rate less than 200 bpm induced atrial flutter or fibrillation in 14 patients of whom nine (64%) had SVT.

(c) Ventricular pacing induced SVT in 15 patients, of whom 14 (64%) had SVT.

(d) An atrial extrastimulus during sinus rhythm induced atrial echoes in 62 patients, 47 (76%) of whom had SVT.

(e) The atrial extrastimulus during sinus rhythm induced atrial tachycardia in 11 patients, nine (82%) of whom had SVT.

Key Words: Electrophysiologic study • supraventricular tachycardia • Holter monitoring


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