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- Title
In-vivo T1 cardiovascular magnetic resonance study of diffuse myocardial fibrosis in hypertrophic cardiomyopathy.
- Authors
Brouwer, Wessel P.; Baars, Emma N.; Germans, Tjeerd; de Boer, Karin; Beek, Aernout M.; van der Velden, Jolanda; van Rossum, Albert C.; Hofman, Mark B. M.
- Abstract
Background In hypertrophic cardiomyopathy (HCM), autopsy studies revealed both increased focal and diffuse deposition of collagen fibers. Late gadolinium enhancement imaging (LGE) detects focal fibrosis, but is unable to depict interstitial fibrosis. We hypothesized that with T1 mapping, which is employed to determine the myocardial extracellular volume fraction (ECV), can detect diffuse interstitial fibrosis in HCM patients. Methods T1 mapping with a modified Look-Locker Inversion Recovery (MOLLI) pulse sequence was used to calculate ECV in manifest HCM (n = 16) patients and in healthy controls (n = 14). ECV was determined in areas where focal fibrosis was excluded with LGE. Results The total group of HCM patients showed no significant changes in mean ECV values with respect to controls (0.26 ± 0.03 vs 0.26 ± 0.02, p = 0.83). Besides, ECV in LGE positive HCM patients was comparable with LGE negative HCM patients (0.27 ± 0.03 vs 0.25 ± 0.03, p = 0.12). Conclusions This study showed that HCM patients have a similar ECV (e.g. interstitial fibrosis) in myocardium without LGE as healthy controls. Therefore, the additional clinical value of T1 mapping in HCM seems limited, but future larger studies are needed to establish the clinical and prognostic potential of this new technique within HCM.
- Subjects
HYPERTROPHIC cardiomyopathy; MAGNETIC resonance imaging; ANALYSIS of variance; BIOPHYSICS; CHI-squared test; LEFT heart ventricle; RESEARCH methodology; MYOCARDIUM; REGRESSION analysis; RESEARCH funding; STATISTICS; T-test (Statistics); DATA analysis; FIBROSIS; DATA analysis software; DESCRIPTIVE statistics
- Publication
Journal of Cardiovascular Magnetic Resonance (BioMed Central), 2014, Vol 16, Issue 1, p1
- ISSN
1532-429X
- Publication type
Article
- DOI
10.1186/1532-429X-16-28