Nerve conduction study and electromyography findings in patients recovering from Covid-19 – Case report
Cristina Daia, Cristian Scheau, Geanina Neagu, Ioana Andone, A. Spanu, Cristina Popescu, Simona Isabelle Stoica, Madalina Codruta Verenca, Gelu Onose
Abstract
•Three patients with recent sequelae after Corona Virus Disease (COVID)-19 such as fatigue and myalgia of both calves underwent electrophysiological examinations, nerve conduction studies (NCS) and electromyography (EMG). NCS shows, as common elements, the presence of a partial or complete conduction block on several nerves, slightly prolonged latency of the tibial nerve, and rare or absent F-waves, all suggesting a demyelinating polyneuropathy due to SARS−COV-2. The short duration and low amplitude of the motor unit action potential with early full recruitment on interference pattern on EMG, typical for myopathy, suggest a direct action of COVID-19 on muscular fibers, especially in the lower limbs.