AIMS Here, we investigate the mechanisms underlying the onset of conduction-related arrhythmias in a three-dimensional (3D) computational model of acute regional ischaemia. METHODS Ischaemia was introduced by realistic gradients of potassium, pH, oxygen and electrical coupling in a 3D slab of ventricular tissue using the LRd model. We focused on a specific stage (10-15 min after occlusion) at...

OBJECTIVE To study the process of denervation-reinnervation in multifocal motor neuropathy with persistent conduction blocks in clinically affected and unaffected muscles. METHOD Volitional single fibre electromyography (SFEMG) was performed in the extensor digitorum communis (EDC) of seven patients. The jitter, the fibre density, and the mean interpotential interval were determined. The resu...

Professor da Disciplina de Neurologia e Neurocirurgia do Curso de Medicina da Universidade Estadual do Oeste do Paraná UNIOESTE, Paraná, Brasil; Professor da Disciplina de Clínica Cirúrgica do Curso de Medicina da Universidade Estadual do Oeste do Paraná UNIOESTE, Paraná, Brasil; Chefe do Serviço de Coloproctologia do Hospital Universitário Cajuru PUCPR, Paraná, Brasil. Infliximab, eternecept a...

Clinical, electrophysiological, and neuropathological features are reported associated with a novel heterozygote point mutation in the extracellular domain of the MPZ gene, where a transversion at codon 71 in exon 3 leads to a codon stop: Glu71stop (ie GAA-->TAA). A 36 year old woman developed a mild recurrent neuropathy after intensive manual work. The motor nerve conduction velocities were sl...

tion techniques, it is important to pursue more specialized methods of evaluating the peripheral nervous system. Additionally, nerves requiring needle excitation and less commonly studied nerves are of importance. From time-to-time patients may present with lesions affecting specific sensory branches that yield small amplitude responses or require averaging techniques to better define the desir...

We examined two sibs with the classic form of Pelizaeus-Merzbacher disease (PMD) and their relatives. Electromyographic-electroneurographic studies and magnetic stimulation of motor pathways were performed. In both patients we found an absence of compound motor action potential (cMAP) after stimulation of the motor cortex and a normal conduction time by stimulating the cervical roots. Despite r...

We report a patient with Lewis-Sumner syndrome (LSS) who showed an improvement only with plasma exchange (PE). The patient, 32-yr old man, had progressive multifocal motor-sensory deficits with persistent, multiple conduction blocks and marked slowing of NCVs. Nerve pathology supported a diagnosis of demyelinating neuropathy by revealing marked loss of myelinated fibers with inter- and intrafas...