Georges Atallah

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To avoid atrioventricular node-His bundle ablation, catheter ablation of the atrial myocardium was attempted in eight patients with drug refractory type I atrial flutter. In seven of eight patients, a zone of prolongation and fragmentation of the endocardial electrogram was found in the low posterior part of the right atrium. Entrainment of the atrial(More)
Electrophysiologic studies were performed in three patients suffering from attacks of paroxysmal tachycardia with wide QRS complexes. Two patients had atrioventricular dissociation. The arrhythmia could be initiated and terminated by premature ventricular stimulation in all three patients. One patient developed the arrhythmia after rapid atrial stimulation.(More)
A 66 year old man presented with multiple episodes of tachycardia. Some had QRS complexes with a right bundle branch block configuration identical to those of sinus beats. The onset of the tachycardia was preceded by premature His bundle depolarizations. There was a His potential before each QRS complex of the tachycardia. Atrial activity was dissociated.(More)
A reentrant mechanism is believed to be responsible for atrial flutter. The recent development of the entrainment criteria further supports this theory, and there is a general consensus that circus movement is the underlying abnormality that supports this arrhythmia. In most clinical studies, abnormal fragmented (or double spike) electrograms, suggesting(More)
Three patients with the permanent form of junctional tachycardia are reported. All had a normal cardiac function when the rhythm disorder was discovered. The basis for tachycardia in the three cases was atrioventricular junctional reentry whose retrograde limb was a concealed posteroseptal accessory pathway. Because of the development of heart failure over(More)
Atrial fibrillation seems to be more common in the absence of associated cardiac disease in the Wolff-Parkinson-White syndrome (WPW) than in subjects of the same age without this condition. The aim of this study was to analyse the electrophysiological mechanism of AF and to establish its relationship to the accessory pathway. The series comprises 14 out of(More)
In order to identify patients who will receive an electric shock after implantation of an automatic fibrillator, the relationship between the time to the first shock and clinical and paraclinical characteristics were studied in 43 patients treated at the Lyon Cardiological Hospital between July 1987 and September 1991. The age of the patients was 49.5 +/-(More)
The electrophysiological effects of lorcainide (R 15 899) were studied in 15 patients. Atrioventricular conduction was analysed by His bundle recording and cardiac refractory periods were determined by the extra stimulus method. The assessment of sino atrial function was performed by measuring sinus node recovery times and sino atrial conduction times. The(More)
The authors studied the clinical, angiographic and electrophysiological features, and the long-term outcome of patients with arrhythmogenic right ventricular dysplasia (ARVD). The study was retrospective and involved 22 patients (3 women and 19 men) with an average age of 36 years at the time of their first documented ventricular tachycardia (VT) and(More)