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Cardiac involvement in hereditary myopathy with early respiratory failure: A cohort study

Lookup NU author(s): Dr Hannah Steele, Dr Lizzie Harris, Dr Rita Barresi, Dr John Bourke, Professor Volker Straub, Professor Patrick Chinnery

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This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).


Abstract

Objective:To assess whether hereditary myopathy with early respiratory failure (HMERF) due to the c.951434T>C; (p.Cys31712Arg) TTN missense mutation also includes a cardiac phenotype.Method:Clinical cohort study of our HMERF cohort using ECG, 2D echocardiogram, and cross-sectional cardiac imaging with MRI or CT.Results:We studied 22 participants with the c.951434T>C; (p.Cys31712Arg) TTN missense mutation. Three were deceased. Cardiac conduction abnormalities were identified in 7/22 (32%): sustained atrioventricular tachycardia (n = 2), atrial fibrillation (n = 2), nonsustained atrial tachycardia (n = 1), premature supraventricular complexes (n = 1), and unexplained sinus bradycardia (n = 1). In addition, 4/22 (18%) had imaging evidence of otherwise unexplained cardiomyopathy. These findings are supported by histopathologic correlation suggestive of myocardial cytoskeletal remodeling.Conclusions:Coexisting cardiac and skeletal muscle involvement is not uncommon in patients with HMERF arising due to the c.951434T>C; (p.Cys31712Arg) TTN mutation. All patients with pathogenic or putative pathogenic TTN mutations should be offered periodic cardiac surveillance.


Publication metadata

Author(s): Steele HE, Harris E, Barresi R, Marsh J, Beattie A, Bourke JP, Straub V, Chinnery PF

Publication type: Article

Publication status: Published

Journal: Neurology

Year: 2016

Volume: 87

Issue: 10

Pages: 1031-1035

Print publication date: 06/09/2016

Online publication date: 10/08/2016

Acceptance date: 26/05/2016

Date deposited: 23/11/2016

ISSN (print): 0028-3878

ISSN (electronic): 1526-632X

Publisher: Lippincott Williams & Wilkins

URL: http://dx.doi.org/10.1212/WNL.0000000000003064

DOI: 10.1212/WNL.0000000000003064


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