Archives des maladies du coeur et des vaisseaux
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Arch Mal Coeur Vaiss · Apr 1984
[Significance of a supraventricular arrhythmia precipitated during an electrophysiological study].
The clinical history and 24 hour Holter monitoring of 749 patients without ECG appearances of ventricular preexcitation were compared with the results of electrophysiological investigations to determine whether supraventricular arrhythmias initiated during endocavitary electrophysiological investigations had any pathological significance. Endocavitary studies were undertaken to investigate symptoms of dizziness, syncope and/or conduction defects except in the group of paroxysmal junctional tachycardia (PJT) where the indication was investigation of a tachycardia (78 cases). In 544 patients (Group I) no arrhythmias were initiated. ⋯ Fixed atrial stimulation (less than 200/min) triggered AF or AFI in 14 patients. Nine had spontaneous SVT (64.3%) : AV was greater than 200/min in 2 cases (14.2%) and VA' greater than or equal 170/min in 2 of the 10 cases studied (20%). Ventricular stimulation induced SVT in 15 patients, 14 of whom had SVT (92%).(ABSTRACT TRUNCATED AT 400 WORDS)