conduction block


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con·duc·tion block

failure of impulse transmission at some point along a nerve fiber, although conduction along the segments proximal and distal to it are unaffected; clinically, most often the result of an area of focal demyelination or, less often, transient ischemia; when caused by focal trauma involving the periperal nervous system, called neurapraxia.

con·duc·tion block

(kŏn-dŭkshŭn blok)
Failure of impulse transmission at some point along a nerve fiber, although conduction along the segments proximal and distal to it are unaffected; clinically, most often the result of an area of focal demyelination or, less often, transient ischemia.
References in periodicals archive ?
3) In this article, we will review the pathophysiology, diagnosis, prognosis, and treatment options of AV blocks versus intraventricular conduction blocks these rhythm disorders.
Conduction block that recovers without development of increased temporal dispersion or other demyelinating features.
Thus, nodal disruption may be a common mechanism in immune-mediated neuropathies associated with autoantibodies to gangliosides GM1, GD1a or GD1b, providing an explanation for the similarities seen in AMAN, AMSAN, acute motor conduction block neuropathy and acute sensory ataxic neuropathy.
Creating multiple conduction blocks represents a return to the classic procedure that was developed approximately two decades ago, and it is the standard for AFib surgery at Cleveland Clinic," says Dr.
We also demonstrated that unidirectional (activation conduction sequence was from LA to PV-LAJ, and finally to LSPV by pacing at LA, from LSPV to PV-LAJ, and to LA by pacing at LSPVd) and bi-directional conduction (activation conduction sequence was from LSPVm to both PV-LAJ and LA as well as to LSPVd simultaneously by pacing at LSPVm), bi-directional decremented conduction as well as slowed retrograde conduction (from LSPV to LA) within LSPV and delayed conduction or conduction block from stimulation signal to local tissue potential before AF.
5-10,16,40,41) Observations have also been made of prolonged wave I latencies of auditory brainstem responses attributable to nerve conduction block that occurred as a result of demyelination in patients with Guillain-Barre syndrome.
The loss of myelin results in a conduction block at the site of a lesion, slower conduction time along an affected nerve and increased fatigue due to compensation for neurologic deficits.
It's common in MMD, especially after many years, to develop a conduction block, a block in the electricity-like signal that keeps the heart beating at a safe rate.
11] Demyelinated fibers do not conduct rapid trains of stimuli as well as myelinated fibers and go into conduction block after repeated use.
This unilateral procedure usually lasts less than two hours and is concluded with rigorous electrophysiological confirmation of conduction block in the operating or hybrid suite.
Our study showed that heart conduction block was very common among Chinese KSS patients, which was consistent with other reports.
Their topics include analog front-end and telemetry systems, energy management integrated circuits for wireless power transmission, the reliability and security of implantable and wearable medical devices, electrodes for the electrical conduction block of the peripheral nerve, and implantable imaging systems for the automated monitoring of internal organs.