The radiation safety access control at GANIL and the RiB SPIRAL facility

International audienc

Catheter Ablation of Mahaim Fibers With Preservation of Atrioventricular Nodal Conduction

Three patients with refractory preexcited tachycardia implicating Mahaim fibers underwent attempted catheter ablation of the accessory pathway. In the absence of demonstrable retrograde conduction in Mahaim fibers, we located the accessory pathway ventricular insertion site using the criteria of concordance between paced and spontaneous QRS morphologies during pace-mapping and earliest onset of local electrogram relative to surface preexcited QRS. At this site, a QS-like pattern of unfiltered unipolar electrograms with steep downstroke was recorded. The optimal site appeared radiologically at the right ventricular anterior wall or the adjacent septum, 2-4 cm from the tricuspid anulus. Three to six 160-J shocks were delivered at this site using an anterior chest wall plate as anode. After fulguration, conduction through the Mahaim tract was absent. A right bundle branch block persisted in two patients. All patients remained free of preexcited tachycardia during 12-16 months of follow-up. Postablation electrophysiological assessment showed no preexcitation in any patient. No reciprocating tachycardia was inducible, even during isoproterenol infusion. Atrioventricular nodal conduction parameters were unchanged from baseline study. Catheter ablation of Mahaim fibers is an effective alternative method for the treatment of tachycardias that include the accessory pathway in the circuit.</jats:p

Water-Resources Investigations Report 83-4166

From purpose and scope: The purpose of this report is to describe the hydrology of Brazil Creek basin in the vicinity of Red Oak and to assess the potential hydrologic effects of surface mining based on data collected between October 1978 and September 1981

Geohydrology of alluvium and terrace deposits of the Cimarron River from Freedom to Guthrie, Oklahoma /

Shipping list no.: 96-0348-P.Includes bibliographical references (p. 49-51).Mode of access: Internet