Muscle Ultrasound Shear Wave Elastography as a Non-Invasive Biomarker in Myotonia

被引:16
作者
Kronlage, Cornelius [1 ,2 ]
Grimm, Alexander [1 ,2 ]
Romano, Alyssa [1 ,2 ]
Stahl, Jan-Hendrik [1 ,2 ]
Martin, Pascal [1 ,2 ]
Winter, Natalie [1 ,2 ]
Marquetand, Justus [1 ,2 ]
机构
[1] Univ Tubingen, Univ Hosp Tubingen, Dept Neurol & Epileptol, D-72076 Tubingen, Germany
[2] Univ Tubingen, Hertie Inst Clin Brain Res, D-72076 Tubingen, Germany
关键词
ultrasound elastography; shear-wave elastography; muscle; myotonia; EFSUMB GUIDELINES; CLINICAL-USE; NONDYSTROPHIC MYOTONIA; RECOMMENDATIONS; ELASTICITY; STIFFNESS; FEASIBILITY; MEXILETINE;
D O I
10.3390/diagnostics11020163
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Myotonia, i.e., delayed muscle relaxation in certain hereditary muscle disorders, can be assessed quantitatively using different techniques ranging from force measurements to electrodiagnostics. Ultrasound shear wave elastography (SWE) has been proposed as a novel tool in biomechanics and neuromuscular medicine for the non-invasive estimation of muscle elasticity and, indirectly, muscle force. The aim of this study is to provide 'proof-of-principle' that SWE allows a quantitative measurement of the duration of delayed muscle relaxation in myotonia in a simple clinical setting. In six myotonic muscle disorder patients and six healthy volunteers, shear wave velocities (SWV) parallel to the fiber orientation in the flexor digitorum superficialis muscle in the forearm were recorded with a temporal resolution of one per second during fist-clenching and subsequent relaxation; the relaxation time to 10% of normalized shear wave velocity (RT0.1) was calculated. Forty-six SWE imaging sequences were acquired, yielding a mean RT0.1 of 7.38 s in myotonic muscle disorder patients, significantly higher than in healthy volunteers (1.36 s), which is comparable to data obtained by mechanical dynamometry. SWV measurements during the baseline relaxation and voluntary contraction phases did not differ significantly between groups. We conclude that SWE is a promising, non-invasive, widely available tool for the quantitative assessment of myotonia to aid in diagnosis and therapeutic monitoring.
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页数:14
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