Relationship of Right Ventricular Size and Function with Respiratory Status in Duchenne Muscular Dystrophy.

Abstract:

:The relationship between pulmonary function and right ventricle (RV) in Duchenne muscular dystrophy (DMD) has not been evaluated. Using cardiac magnetic resonance (CMR), we describe the relationship of RV size and function with spirometry in a DMD cohort. Fifty-seven boys undergoing CMR and pulmonary function testing within 1 month at a single center (2013-2015) were enrolled. Comparisons of RV ejection fraction (RVEF) and end-diastolic volume index (RVEDVI) were made across categories of percent forced vital capacity (FVC%), and relationships were assessed. Mean age was 15.5 ± 3.5 years. Spirometry and CMR were performed within 3.9 ± 4.1 days. Median FVC% was 92.0 % (67.5-116.5 %). Twenty-three (40 %) patients had abnormal FVC% (<80 %) of which 13 (57 %) had mild (FVC% 60-79 %), 6 (26 %) had moderate (FVC% 40-59 %), and 4 (17 %) had severe (FVC <40 %) reductions. Mean RVEF was 58.3 ± 3.7 %. Patients with abnormal FVC% were older and had lower RVEF and RVEDVI. Both RVEF and RVEDVI were significantly associated with FVC% (r = 0.31, p = 0.02 and r = 0.39, p = 0.003, respectively). In a large DMD cohort, RVEF and RVEDVI were related to FVC%. Worsening respiratory status may guide monitoring of cardiac function in these patients.

journal_name

Pediatr Cardiol

journal_title

Pediatric cardiology

authors

Mehmood M,Ambach SA,Taylor MD,Jefferies JL,Raman SV,Taylor RJ,Sawani H,Mathew J,Mazur W,Hor KN,Al-Khalidi HR

doi

10.1007/s00246-016-1362-2

subject

Has Abstract

pub_date

2016-06-01 00:00:00

pages

878-83

issue

5

eissn

0172-0643

issn

1432-1971

pii

10.1007/s00246-016-1362-2

journal_volume

37

pub_type

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