Functional and isokinetic assessment of muscle strength in patients with idiopathic inflammatory myopathies.

Abstract:

OBJECTIVE:To assess muscle strength in patients with idiopathic inflammatory myopathies (IIM) using neuromuscular scales and isokinetic testing. METHODS:Muscle function was evaluated in 27 IIM patients being followed at the Rheumatology Unit of the University of Pisa using: (i) a modified version of the grading system used to assess Duchenne dystrophy, (ii) the four-stage grading system of Henriksson and Sandstedt, (iii) an isokinetic muscle strength test (Kin Com, Chatanooga) and (iv) the Health Assessment Questionnaire (HAQ). RESULTS:The neuromuscular scales showed normal or only mildly impaired muscle strength in 60% (Duchenne scale) and 80% (Henriksson and Sandstedt scale) of the patients, respectively, whereas isokinetic testing detected moderate to severe reductions in muscle strength in almost 70% of the patients. No correlations were observed between muscle strength and disease activity, therapy, age at evaluation and disease duration. There was a correlation between the results of the HAQ and neuromuscular testing, but not the isokinetic test. CONCLUSIONS:Although less easy and more expensive to administer, isokinetic testing appears to be a more sensitive instrument than the standard neuromuscular tests for assessing muscle function in IIM patients. In particular, it can detect small reductions in muscle strength.

journal_name

Autoimmunity

journal_title

Autoimmunity

authors

Neri R,Mosca M,Stampacchia G,Vesprini E,Tavoni A,d'Ascanio A,Bombardieri S

doi

10.1080/08916930600623817

subject

Has Abstract

pub_date

2006-05-01 00:00:00

pages

255-9

issue

3

eissn

0891-6934

issn

1607-842X

pii

K6265755P62333N1

journal_volume

39

pub_type

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