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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
medicine
Diastolic Abnormalities as the First Feature of Hypertrophic Cardiomyopathy in Dutch Myosin-Binding Protein C Founder Mutations
JACC: Cardiovascular Imaging, Volume 2, No. 1, Year 2009
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Description
Objectives: To test the hypothesis that carriers of Dutch founder mutations in cardiac myosin-binding protein C (MYBPC3), without left ventricular hypertrophy (LVH) or electrocardiographic abnormalities, have diastolic dysfunction on tissue Doppler imaging (TDI), which can be used for the screening of family members in the hypertrophic cardiomyopathy (HCM) population. Background: TDI is a more sensitive technique for the assessment of left ventricular contraction and relaxation abnormalities than is conventional echocardiography. Methods: Echocardiographic studies including TDI were performed in genotyped hypertrophic cardiomyopathy patients (genotype-positive, G+/LVH+; n = 27), mutation carriers without LVH (G+/LVH-; n = 27), and healthy controls (n = 55). The identified mutations in MYBPC3 in the G+/LVH+ subjects were c.2864_2865delCT (12 subjects), c.2373dupG (n = 8), and p. Arg943X (n = 7). In the G+/LVH- subjects, the following mutations were identified: c.2864_2865delCT (n = 11), c.2373dupG (n = 8), and p. Arg943X (n = 8). Results: Mean TDI-derived systolic and early and late diastolic mitral annular velocities were significantly lower in the G+/LVH+ subjects compared with the other groups. However, there was no difference between controls and G+/LVH- subjects. Mean TDI-derived late mitral annular diastolic velocities were significantly higher in the G+/LVH- subjects compared with controls and G+/LVH+ subjects. Using a cut-off value of mean ± 2 SD, an abnormal late mitral annular diastolic velocity was found in 14 (51%) of G+/LVH- patients. There was no difference among the 3 different mutations. Conclusions: In contrast to earlier reports, mean mitral annular systolic velocity and early mitral annular diastolic velocity velocities were not reduced in G+/LVH- subjects, and TDI velocities were not sufficiently sensitive for determination of the affected status of an individual subject. Our findings, however, support the theory that diastolic dysfunction is a primary component of pre-clinical HCM. © 2009 American College of Cardiology Foundation.
Authors & Co-Authors
Michels, Michelle
Netherlands, Rotterdam
Erasmus Mc
Soliman, O. I.I.
Netherlands, Rotterdam
Erasmus Mc
Hoedemaekers, Yvonne M.
Netherlands, Rotterdam
Erasmus Mc
Dooijes, Dennis
Netherlands, Rotterdam
Erasmus Mc
Ten Cate, Folkert J.
Netherlands, Rotterdam
Erasmus Mc
Statistics
Citations: 80
Authors: 5
Affiliations: 2
Identifiers
Doi:
10.1016/j.jcmg.2008.08.003
ISSN:
1936878X
Research Areas
Cancer
Genetics And Genomics
Noncommunicable Diseases
Study Design
Cross Sectional Study