Characteristics of A-waves in patients with amyotrophic lateral sclerosis (ALS) versus demyelinating neuropathies (DN)

Objective Detect the occurrence and characteristics of A-waves in amyotrophic lateral sclerosis (ALS) and demyelinating neuropathies (DN). Methodology Nerve conduction studies (NCS) of 28 patients (14 patients with ALS and 14 patients with DN) were reanalyzed to look for A-waves. Results We studied...

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Published inThe Egyptian Journal of Neurology, Psychiatry and Neurosurgery Vol. 56; no. 1; pp. 1 - 5
Main Author Rashed, Hebatallah R
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer Berlin Heidelberg 14.01.2020
Springer Nature B.V
SpringerOpen
Subjects
A-waves
ALS
Amyotrophic lateral sclerosis
Demyelinating neuropathies
Medicine
Medicine & Public Health
NCS
Neurology
Neurosurgery
Psychiatry
ALS
Demyelinating neuropathies
A-waves
NCS
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Abstract Objective Detect the occurrence and characteristics of A-waves in amyotrophic lateral sclerosis (ALS) and demyelinating neuropathies (DN). Methodology Nerve conduction studies (NCS) of 28 patients (14 patients with ALS and 14 patients with DN) were reanalyzed to look for A-waves. Results We studied 61 nerves of the ALS group and 64 nerves of DN. In the ALS group, A-waves were detected in 21 nerves out of 61 nerves (34.4%). In the DN group, A-waves were recorded from 25 nerves out of 64 nerves (39%). In the DN group, A-waves were detected more often in nerves of upper extremities than lower extremities (out of a total of 25 nerves with A-waves, 18 median and ulnar nerves showed A-waves (72%) and that was statistically significant ( P  = 0.0021)). Complex A-waves (CAWs) occurred exclusively in patients with DN. Conclusion Most of the A-waves in the DN group were recorded more frequently from nerves of the upper extremities than those from lower extremities. CAWs occurred only in DN. Significance CAW seems to be a useful specific electrodiagnostic tool to distinguish DN from ALS.
AbstractList Abstract Objective Detect the occurrence and characteristics of A-waves in amyotrophic lateral sclerosis (ALS) and demyelinating neuropathies (DN). Methodology Nerve conduction studies (NCS) of 28 patients (14 patients with ALS and 14 patients with DN) were reanalyzed to look for A-waves. Results We studied 61 nerves of the ALS group and 64 nerves of DN. In the ALS group, A-waves were detected in 21 nerves out of 61 nerves (34.4%). In the DN group, A-waves were recorded from 25 nerves out of 64 nerves (39%). In the DN group, A-waves were detected more often in nerves of upper extremities than lower extremities (out of a total of 25 nerves with A-waves, 18 median and ulnar nerves showed A-waves (72%) and that was statistically significant (P = 0.0021)). Complex A-waves (CAWs) occurred exclusively in patients with DN. Conclusion Most of the A-waves in the DN group were recorded more frequently from nerves of the upper extremities than those from lower extremities. CAWs occurred only in DN. Significance CAW seems to be a useful specific electrodiagnostic tool to distinguish DN from ALS.
Objective Detect the occurrence and characteristics of A-waves in amyotrophic lateral sclerosis (ALS) and demyelinating neuropathies (DN). Methodology Nerve conduction studies (NCS) of 28 patients (14 patients with ALS and 14 patients with DN) were reanalyzed to look for A-waves. Results We studied 61 nerves of the ALS group and 64 nerves of DN. In the ALS group, A-waves were detected in 21 nerves out of 61 nerves (34.4%). In the DN group, A-waves were recorded from 25 nerves out of 64 nerves (39%). In the DN group, A-waves were detected more often in nerves of upper extremities than lower extremities (out of a total of 25 nerves with A-waves, 18 median and ulnar nerves showed A-waves (72%) and that was statistically significant ( P  = 0.0021)). Complex A-waves (CAWs) occurred exclusively in patients with DN. Conclusion Most of the A-waves in the DN group were recorded more frequently from nerves of the upper extremities than those from lower extremities. CAWs occurred only in DN. Significance CAW seems to be a useful specific electrodiagnostic tool to distinguish DN from ALS.
ObjectiveDetect the occurrence and characteristics of A-waves in amyotrophic lateral sclerosis (ALS) and demyelinating neuropathies (DN).MethodologyNerve conduction studies (NCS) of 28 patients (14 patients with ALS and 14 patients with DN) were reanalyzed to look for A-waves.ResultsWe studied 61 nerves of the ALS group and 64 nerves of DN. In the ALS group, A-waves were detected in 21 nerves out of 61 nerves (34.4%). In the DN group, A-waves were recorded from 25 nerves out of 64 nerves (39%). In the DN group, A-waves were detected more often in nerves of upper extremities than lower extremities (out of a total of 25 nerves with A-waves, 18 median and ulnar nerves showed A-waves (72%) and that was statistically significant (P = 0.0021)). Complex A-waves (CAWs) occurred exclusively in patients with DN.ConclusionMost of the A-waves in the DN group were recorded more frequently from nerves of the upper extremities than those from lower extremities. CAWs occurred only in DN.SignificanceCAW seems to be a useful specific electrodiagnostic tool to distinguish DN from ALS.
Author Rashed, Hebatallah R
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10.1212/01.wnl.0000277697.55288.d0
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Copyright The Author(s) 2020
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Demyelinating neuropathies
A-waves
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Snippet Objective Detect the occurrence and characteristics of A-waves in amyotrophic lateral sclerosis (ALS) and demyelinating neuropathies (DN). Methodology Nerve...
ObjectiveDetect the occurrence and characteristics of A-waves in amyotrophic lateral sclerosis (ALS) and demyelinating neuropathies (DN).MethodologyNerve...
Abstract Objective Detect the occurrence and characteristics of A-waves in amyotrophic lateral sclerosis (ALS) and demyelinating neuropathies (DN). Methodology...
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SubjectTerms A-waves
ALS
Amyotrophic lateral sclerosis
Demyelinating neuropathies
Medicine
Medicine & Public Health
NCS
Neurology
Neurosurgery
Psychiatry
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Title Characteristics of A-waves in patients with amyotrophic lateral sclerosis (ALS) versus demyelinating neuropathies (DN)
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