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Liu Renguang - One of the best experts on this subject based on the ideXlab platform.

Chen Yang - One of the best experts on this subject based on the ideXlab platform.

Juan Chen - One of the best experts on this subject based on the ideXlab platform.

  • pre excitation Syndrome with a change in terminal qrs vector
    Acta Cardiologica, 2013
    Co-Authors: Renguang Liu, Juan Chen
    Abstract:

    Most accessory pathways in Pre-Excitation Syndrome are capable of antegrade conduction from atrium to ventricle, and identified by characteristic ECG abnormalities such as a delta wave (ventricular Pre-Excitation) and a shortened PR interval.Therefore, the traditional diagnosis method is to detect the initial changes of the QRS complex. Here we report a patient initially mistaken as having atrioventricular re-entrant tachycardia (AVRT) and concealed Pre-Excitation Syndrome. A diagnosis of incomplete latent Pre-Excitation Syndrome was established on the basis of differences between the ECGs during sinus rhythm and AVRT in terminal QRS vectors, demonstrated by intracardiac electrophysiological radiofrequency catheter ablation.

Olivier Selton - One of the best experts on this subject based on the ideXlab platform.

  • incidence and prognostic significance of spontaneous and inducible antidromic tachycardia
    Europace, 2013
    Co-Authors: Beatrice Brembillaperrot, Maheshwar Pauriah, Jeanmarc Sellal, Pierre Yves Zinzius, Jerome Schwartz, Christian De Chillou, Gabriel Cismaru, D Beurrier, Damien Voilliot, Olivier Selton
    Abstract:

    Aims Orthodromic atrioventricular reentrant tachycardia (ORT) is the most common arrhythmia at electrophysiological study (EPS) in patients with Pre-Excitation. The purpose of the study was to determine the clinical significance and the electrophysiological characteristics of patients with inducible antidromic tachycardia (ADT). Methods and results Electrophysiological study was performed in 807 patients with a Pre-Excitation Syndrome in control state and after isoproterenol. Antidromic tachycardia was induced in 63 patients (8%). Clinical and electrophysiological data were compared with those of 744 patients without ADT. Patients with and without ADT were similar in term of age (33 ± 18 vs. 34 ± 17), male gender (68 vs. 61%), clinical presentation with spontaneous atrioventricular reentrant tachycardia (AVRT) (35 vs. 42%), atrial fibrillation (AF) (3 vs. 3%), syncope (16 vs. 12%). In patients with induced ADT, asymptomatic patients were less frequent (24 vs. 37%; <0.04), spontaneous ADT and spontaneous malignant form more frequent (8 vs. 0.5%; <0.001) (16 vs. 6%; <0.002). Left lateral accessory pathway (AP) location was more frequent (51 vs. 36%; P < 0.022), septal location less frequent (40 vs. 56%; P < 0.01). And 1/1 conduction through AP was more rapid. Orthodromic AVRT induction was as frequent (55.5 vs. 55%), but AF induction (41 vs. 24%; P < 0.002) and electrophysiological malignant form were more frequent (22 vs. 12%; P < 0.02). The follow-up was similar; four deaths and three spontaneous malignant forms occurred in patients without ADT. When population was divided based on age (<20/≥20 years), the older group was less likely to have criteria for malignant form. Conclusion Antidromic tachycardia induction is rare in Pre-Excitation Syndrome and generally is associated with spontaneous or electrophysiological malignant form, but clinical outcome does not differ.

W. Iiarniscifeger - One of the best experts on this subject based on the ideXlab platform.

  • Hereditary Occurrence of the Pre-Excitation (Wolff-Parkinson-White) Syndrome with Re-Entry Mechanism and Concealed Conduction
    2016
    Co-Authors: W. Iiarniscifeger
    Abstract:

    The hereditary occurrence of the Pre-Excitation (Wolff-Parkinson-White) Syndrome in 3 generations of 1 family is reported. The Syndrome was observed in a grandfather. father, in a set of identical twin girls, and in the male of a second set of fraternal twins. Completed abortive circus movements with re-entry into the normal conduction pathway. as well as concealed forward conduction, in the Pre-Excitation Syndrome are demonstrated. The importance of this observation for the understanding of the mechanism of the Wolff-Parkinson-White Syndrome is discussed. N INTERNATIONAL panel discussion on "Aiiomalous Atrioventricular Exci-tation " sponsored by the New York Academy of Sciences resulted in the advancement of 3 main concepts as an explanation for the Pre-Excitation Syndrome.' A mechanism was proposed by Sodi-Pal-lares, Calder, and associates that certain areas high in the interventricular septum are hypersensitive and, therefore, very easily stimulated and that the stimulus responsible for the excitation of these areas does not travel by aiiy anatomically recognizable path-way. These authors were able to produce ex-perimentally by right heart catheterization ventricular complexes with "remarkable like-ness " to those found in clinical examples of the Pre-Excitation Syndrome. " 2 A second theory of Priuzinetal, Ktenniiaimier, and associates was that inl the Wolff-Parkin-soni-White (W-P-W) Syndrome the atrial im-pulse passes to the vetitrieles over the normal coniductioni system anid not bv way of anomna-lous connections, but that the normal delay in the atrioventricular (A-V) node is partially overcome, so that the impulse in part of th