Study Objectives: Restless legs syndrome, also known as Willis-Ekbom disease (RLS/WED), is a frequent condition, though its pathophysiology is not completely understood. The diagnosis of RLS/WED relies on clinical criteria, and the only instrumental tool, the suggested immobilization test, may lead to equivocal results. Recently, neurophysiological parameters related to F-wave duration have been proposed as a diagnostic aid. The aim of this study is to assess and compare the diagnostic values of these parameters in diagnosis of RLS/WED.
Methods: Fifteen women affected by primary RLS/WED and 17 age- and sex- matched healthy subjects. A complete electroneurographic evaluation, including nerve conduction studies (NCS), cutaneous silent period (CSP), and F-wave parameters, namely amplitude, F-wave duration (FWD), and the ratio between FWD and duration of the corresponding compound muscle action potential (FWD/CMAPD).
Results: No subject showed alterations of the NCS. However, FWD and FWD/CMAPD of both upper and lower limbs were significantly longer in patients than controls. Tibial FWD/CMAPD best discriminated RLS/WED patients from controls. A cutoff of 2.06 yielded a sensitivity of 69.2%, a specificity of 94.1%, a positive predictive power of 90%, and a negative predictive power of 80% (area under the curve = 0.817; 95% confidence interval = 0.674-0.959). The combination of ulnar or tibial FWD/CMAPD increases the sensitivity (85.7%) while slightly decreasing the specificity (87.5%, positive predictive value: 85.7%, negative predictive value: 87.5%).
Conclusions: Lower limb FWD/CMAPD ratio may represent a supportive diagnostic tool, especially in cases of evening lower leg discomfort of unclear interpretation.
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http://dx.doi.org/10.5664/jcsm.6482 | DOI Listing |
Cerebellum
December 2024
Department of Neurology, The First Affiliated Hospital, Sun Yat-sen University; Guangdong Provincial Key Laboratory of Diagnosis and Treatment of Major Neurological Diseases; National Key Clinical Department and Key Discipline of Neurology, No.58 Zhongshan Road 2, Guangzhou, 510080, China.
The use of F-wave study may help to gain insight into electrophysiological significance of spinocerebellar Ataxias (SCAs). Particularly, the difference of F-wave features between Chinese SCA1, SCA2 and SCA3 patients were scarcely reported. 20 SCA1, 20 SCA2, 46 SCA3 patients and 30 healthy controls underwent nerve (median, ulnar, tibial) conduction and F-wave studies, and electrophysiology parameters were compared between them.
View Article and Find Full Text PDFJ Multidiscip Healthc
November 2024
Department of Nephrology, The First Affiliated Hospital of Ningbo University, Ningbo, Zhejiang,People's Republic of China.
Muscle Nerve
October 2024
Department of Neurology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, China.
Introduction/aims: F-wave testing frequently reveals after-discharges of varied morphologies in patients with primary peripheral nerve hyperexcitability syndrome (PNHS), although reports are scant. This study aimed to explore the morphological characteristics of the after-discharges during F-wave tests in PNHS, and to assess the association between after-discharges and the disease classification.
Methods: We conducted a retrospective analysis of patients diagnosed with PNHS between 2014 and 2022.
Kyobu Geka
January 2024
Department of First Surgery, Hamamatsu University, Hamamatsu, Japan.
Objective: In an effort to avoid postoperative sick sinus syndrome( SSS), we omit the ablation line to the superior vena cava( SVC) in the Cox-mazeⅢ lesion set. We report the long-term outcomes, including the freedom from SSS.
Methods: We studied 102 patients who underwent bi-atrial maze procedure for persistent atrial fibrillation (Af) from 2009 through 2023.
Muscle Nerve
May 2024
Departments of Pediatrics and Neurology, Emory University School of Medicine, Atlanta, Georgia, USA.
Introduction/aims: Objective outcome measures in children undergoing treatment for chronic inflammatory demyelinating polyradiculoneuropathy (CIDP) are lacking. The aim of the study was to record serial grip strength and motor nerve conduction studies to assess interval change.
Methods: This was a retrospective review of 16 children (8 females and 8 males; median age, 9.
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