نتایج جستجو برای: late potentials

تعداد نتایج: 296610  

2013
Tamer M. Gamal El-Din Gilbert Q. Martinez Jian Payandeh Todd Scheuer William A. Catterall

Voltage-gated sodium channels undergo slow inactivation during repetitive depolarizations, which controls the frequency and duration of bursts of action potentials and prevents excitotoxic cell death. Although homotetrameric bacterial sodium channels lack the intracellular linker-connecting homologous domains III and IV that causes fast inactivation of eukaryotic sodium channels, they retain th...

2008
W. L. Ferreira R.C.A. Sousa A. A. Camacho Clóvis Pestana

The occurrence of late potentials in dogs under doxorubicin-induced cardiomyopathy and their relationship with the development of ventricular arrhythmias or sudden death were studied. Seven adult mongrel dogs of both sexes were used. Cardiomyopathy was induced by slow intravenous infusion of doxorubicin (30mg/m) at 21-day intervals, until a total cumulative dose of 240mg/m was reached. Animals ...

2015
Muhammad Alamgir Khan Syed Muhammad Imran Majeed Madiha Sarwar

Objective: To determine the effect of noise on identification of ventricular late potentials. Study Design: Cross sectional comparative study. Place and Duration of Study: Armed Forces Institute of Cardiology/National Institute of Heart Diseases, Rawalpindi from May 2006 to February 2007. Methodology: The study included 37 patients with Mitral Valve Prolapse for the identification of ventricula...

2015
Adam Attaheri Yukiko Kikuchi Alice E. Milne Benjamin Wilson Kai Alter Christopher I. Petkov

Electroencephalography (EEG) has identified human brain potentials elicited by Artificial Grammar (AG) learning paradigms, which present participants with rule-based sequences of stimuli. Nonhuman animals are sensitive to certain AGs; therefore, evaluating which EEG Event Related Potentials (ERPs) are associated with AG learning in nonhuman animals could identify evolutionarily conserved proces...

Journal: :Psychophysiology 2008
Cornelia Herbert Markus Junghofer Johanna Kissler

We investigated to what extent emotional connotation influences cortical potentials during reading. To this end, event-related potentials (ERPs) were recorded during reading of high arousal pleasant and unpleasant and low arousal neutral adjectives that were presented at rates of 1 Hz and 3 Hz. Enhanced processing of both pleasant and unpleasant emotional compared to neutral adjectives was firs...

Journal: :Acta neurobiologiae experimentalis 2012
Eliane Schochat Carla Gentile Matas Alessandra Giannella Samelli Renata Mota Mamede Carvallo

This study verifies the effects of contralateral noise on otoacoustic emissions and auditory evoked potentials. Short, middle and late auditory evoked potentials as well as otoacoustic emissions with and without white noise were assessed. Twenty-five subjects, normal-hearing, both genders, aged 18 to 30 years, were tested . In general, latencies of the various auditory potentials were increased...

Journal: :International journal of psychophysiology : official journal of the International Organization of Psychophysiology 1988
H J Michalewski A W Mohamed Kamel A Starr

Visual event-related potentials were recorded from a group of 10 normal subjects while they judged the proximity of two letters of the alphabet. Subjects viewed singly the letters A, D, G, L, N, T, W and Z and indicated by button press whether the letter displayed occurred before or after the comparison letter M. Reaction times to close letters (L and N) were longer than ordinally more distant ...

Journal: :Journal of applied physiology 2004
Christine Donzel-Raynaud Christian Straus Michela Bezzi Stefania Redolfi Mathieu Raux Marc Zelter Jean-Philippe Derenne Thomas Similowski

Repeated inspiratory occlusions in humans elicit respiratory-related cortical potentials, the respiratory counterpart of somatosensory-evoked potentials. These potentials comprise early components (stimulus detection) and late components (cognitive processing). They are considered as the summation of several afferent activities from various part of the respiratory system. This study assesses th...

Journal: :Circulation. Arrhythmia and electrophysiology 2015
Samuel H Baldinger Koichi Nagashima Saurabh Kumar Chirag R Barbhaiya Eue-Keun Choi Laurence M Epstein Gregory F Michaud Roy John Usha B Tedrow William G Stevenson

BACKGROUND Mapping to identify scar-related ventricular tachycardia re-entry circuits during sinus rhythm focuses on sites with abnormal electrograms or pace-mapping findings of QRS morphology and long stimulus to QRS intervals. We hypothesized that (1) these methods do not necessarily identify the same sites and (2) some electrograms are far-field potentials that can be recognized by pacing. ...

Journal: :Circulation 1985
J F Spear D A Richards G J Blake M B Simson E N Moore

Experiments were performed on 20 anesthetized dogs to determine the effects of premature stimulation of the His bundle on epicardial conduction and late potentials recorded on the body surface. Fifteen dogs underwent occlusion of the left anterior descending coronary for 2 hr followed by reperfusion, and five that did not undergo operation served as controls. Animals were studied 2 to 52 weeks ...

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