Using MRI to Quantify Fatty Infiltration in Muscle Tissue, and Compare it to Isometric Muscle Strength Measurements and (2) Use Questionnaires, Systemic Interview and Simple Myotonic Bed-side Tests to Describe the Phenotype.

Rigshospitalet, Denmark1 site in 1 country25 target enrollmentFebruary 2, 2021

ConditionsParamyotonia Congenita Nondystrophic Myotonia

Overview

Phase: Not Applicable
Intervention: Not specified
Conditions: Paramyotonia Congenita
Sponsor: Rigshospitalet, Denmark
Enrollment: 25
Locations: 1
Primary Endpoint: Contractile properties
Last Updated: 4 years ago

Overview Investigators Eligibility Criteria Outcomes Sites Similar Trials

Overview

Brief Summary

The aim of this project is (1) to investigate whether or not structural muscle abnormalities could be a consequence of the disorder and (2) to provide further clinical description of this rare phenotype. To do so, the investigators will (1) use Dixon MRI to quantify fatty infiltration in muscle tissue and compare it to muscle strength measurements from isometric dynamometry in order to access contractility and (2) describe the myotonic phenotype with simple squeeze test and questionnaires.

Detailed Description

Non-dystrophic myotonias are rare genetic diseases in which the membrane excitability is altered by mutations in genes encoding muscle ion channels. Patients suffer from myotonic stiffness, pain, fatigue and sometimes paralysis. Non-dystrophic myotonia is distinct from myotonic dystrophies with the absence of muscle degeneration. Paramyotonica congenita is characterzied by paradoxial myotonia, which, in contrast to the more common myotonia congenita, is myotonic stiffness that worsens with activity. Typically, the first few contractions seem normal, whereas repetition leads to severe stiffness. Our hypophysis is that these patient might also suffer from muscle degeneration.

Registry

clinicaltrials.gov

Start Date

February 2, 2021

End Date

December 31, 2021

Last Updated

4 years ago

Study Type

Observational

Sex

All