Abstract:
INTRODUCTION:We sought to determine the specificity of compound muscle action potential (CMAP) durations and amplitudes in a large critical illness neuromyopathy (CINM) cohort relative to controls with other neuromuscular conditions. METHODS:Fifty-eight patients with CINM who had been seen over a 17-year period were retrospectively studied. Electrodiagnostic findings of the CINM cohort were compared with patients with axonal peripheral neuropathy and myopathy due to other causes. RESULTS:Mean CMAP durations were prolonged, and mean CMAP amplitudes were severely reduced both proximally and distally in all nerves studied in the CINM cohort relative to the control groups. The specificity of prolonged CMAP durations for CINM approached 100% if they were encountered in more than 1 nerve. DISCUSSION:Prolonged, low-amplitude CMAPs occur more frequently and with greater severity in CINM patients than in neuromuscular controls with myopathy and axonal neuropathy and are highly specific for the diagnosis of CINM. Muscle Nerve 57: 395-400, 2018.
journal_name
Muscle Nervejournal_title
Muscle & nerveauthors
Kramer CL,Boon AJ,Harper CM,Goodman BPdoi
10.1002/mus.25732subject
Has Abstractpub_date
2018-03-01 00:00:00pages
395-400issue
3eissn
0148-639Xissn
1097-4598journal_volume
57pub_type
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