[Latencies of Sensory and Cognitive Components of Event Related Potentials during Perception of Verbal Stimuli in the Norm and Schizophrenic Patients].

The aim of this work is the study of early and later indices of brain informational processing during the passive reading of concrete words in healthy subjects and schizophrenic patients using the ERP method. Comparative analysis of components P100, N170, P200 and P300 in implicit situation showed that in schizophrenic patients the latency of early components P100 and N170 is shorter while the latency of later components P200 and P300--is longer than in healthy subjects. It could be supposed that the patients have deficit of the early automatic sensory processing of the stimuli revealing through the shortening of their recognition time and this results in the decrease of completeness and preciseness of sensory analysis.

Left atrial appendectomy after failed catheter ablation of a focal atrial tachycardia originating in the left atrial appendage.

This report describes a case of left atrial appendectomy after a failed endocardial catheter ablation of a continuous drug-refractory left atrial appendage (LAA) tachycardia in a 9-year-old boy. Electrophysiologic study showed atrial tachycardia (AT) originating in the LAA. Numerous radiofrequency applications with an irrigated-tip catheter were ineffective.