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Title: | Left ventricular structural and functional changes in Friedreich ataxia - Relationship with body size, sex, age and genetic severity. | Authors: | Peverill R.E.;Hassam R.;Donelan L.;Corben L.A.;Delatycki M.B.;Romanelli G. | Institution: | (Peverill, Romanelli, Donelan, Hassam) Monash Cardiovascular Research Centre, Department of Medicine (School of Clinical Sciences at Monash Medical Centre), Monash University and Monash Health, Clayton, VIC, Australia (Corben, Delatycki) Bruce Lefroy Centre for Genetic Health Research, Murdoch Childrens Research Institute, Royal Children's Hospital, Parkville, VIC, Australia (Delatycki) Victorian Clinical Genetics Services, Royal Children's Hospital, Parkville, VIC, Australia | Issue Date: | 19-Nov-2019 | Copyright year: | 2019 | Publisher: | Public Library of Science (E-mail: plos@plos.org) | Place of publication: | United States | Publication information: | PLoS ONE. 14 (11) (no pagination), 2019. Article Number: e0225147. Date of Publication: 2019. | Journal: | PLoS ONE | Abstract: | Introduction Although a concentric pattern of left ventricular (LV) geometry appears to be common in Friedreich ataxia (FRDA), there is no accepted method for diagnosing LV abnormalities in FRDA, sex and body size have often not been taken into consideration, and it has not been clear whether children and adults should be classified using the same criteria. The aim of this study was to better define the LV geometric changes in FRDA with respect to sex, body size and subject age, and to investigate the relationship of LV changes with genetic severity, as assessed by GAA repeat length within the shorter allele of the FXN gene (GAA1). Methods Echocardiography was performed in 216 subjects (68 children, 148 adults), measurements were made at end-diastole of LV internal diameter (LVEDID), septal wall thickness (SWT), LV length (LVEDL) and LV volume (LVEDV), and calculations were made of relative wall thickness (RWT), LV mass and LV ejection fraction (LVEF). Results The most common LV abnormalities in both adults and children with FRDA were increases in RWT and age-normalized RWT. In adults with a normal LVEF, all LV variables other than RWT were larger in males independent of body surface area (BSA), and all LV variables other than SWT and RWT were positively correlated with BSA. After adjustment for sex and BSA, GAA1 was a positive correlate of SWT and RWT (but not of LV mass), and was an inverse correlate of LVEDID, LVEDL and LVEDV. In children with a normal LVEF, SWT, LV mass and LVEDL were larger in males than females after adjusting for BSA, and in combination with sex, BSA was a positive correlate of all the LV variables except SWT and RWT. In children there were no correlations of GAA1 with any of the LV variables. Conclusion In FRDA, increases in RWT and age-normalized RWT are the most frequent LV structural abnormalities, sex and body size are important determinants of most other LV structural variables in both children and adults, and increased genetic severity is associated with a smaller left ventricle and increased LV wall thickness in adults, but not associated with LV size or wall thickness in children.Copyright © 2019 Peverill et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. | DOI: | http://monash.idm.oclc.org/login?url=http://dx.doi.org/10.1371/journal.pone.0225147 | PubMed URL: | 31721791 [http://www.ncbi.nlm.nih.gov/pubmed/?term=31721791] | ISSN: | 1932-6203 (electronic) | URI: | https://repository.monashhealth.org/monashhealthjspui/handle/1/35303 | Type: | Article | Subjects: | *heart left ventricle function heart left ventricle mass heart rate homozygosity human image analysis major clinical study male point mutation systolic blood pressure transthoracic echocardiography echocardiograph *FXN gene heart left ventricle enddiastolic length peak early diastolic transmitral flow velocity peak late diastolic transmitral flow velocity septal wall thickness Sonos 5500 ultrasound machine heart left ventricle internal diameter adult *age article body mass *body size cardiovascular parameters child controlled study diastolic blood pressure *disease association *disease severity female *Friedreich ataxia *gender gene genetic analysis heart left ventricle ejection fraction heart left ventricle enddiastolic volume female *Friedreich ataxia *gender gene genetic analysis heart left ventricle ejection fraction heart left ventricle enddiastolic volume *heart left ventricle function heart left ventricle mass heart rate homozygosity human image analysis *body size male point mutation systolic blood pressure transthoracic echocardiography body mass Article *age adult major clinical study cardiovascular parameters child controlled study diastolic blood pressure *disease association *disease severity |
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