Soliman OII, Timmermans RGM, Nemes A, Vletter WB, Wilson JHP, ten Cate FJ, Geleijnse ML. Cardiac abnormalities in adults with the attenuated form of mucopolysaccharidosis type I.
J Inherit Metab Dis 2007;
30:750-7. [PMID:
17574537 PMCID:
PMC2798132 DOI:
10.1007/s10545-007-0586-y]
[Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2007] [Revised: 04/11/2007] [Accepted: 04/23/2007] [Indexed: 11/24/2022]
Abstract
BACKGROUND
Cardiac involvement in mucopolysaccharidosis type I (MPS I) has been studied primarily in its most severe forms. Cardiac involvement, particularly left ventricular (LV) systolic and diastolic function, in the attenuated form of MPS I is less well known.
METHODS
Cardiac function was prospectively investigated in 9 adult patients with the attenuated form of MPS I. All patients underwent 12-lead electrocardiography, 24 h Holter monitoring and two-dimensional echocardiography including tissue Doppler imaging (TDI). Eighteen age- and sex-matched healthy volunteers served as a control group.
RESULTS
Aortic, mitral and tricuspid valve thickening was seen in, respectively, 5 (56%), 4 (44%) and 2 (22%) patients. Moderate mitral valve stenosis was seen in 1 patient and moderate aortic stenosis in 2 patients. All patients had mild-to-moderate aortic and mitral valve regurgitation and 6 patients (67%) had mild-to-moderate tricuspid valve regurgitation. Despite normal LV dimensions, ejection fraction and mass index, MPS patients had lower mean systolic mitral annular velocities (6.1 +/- 0.6 vs 9.1 +/- 1.4 cm/s, p < 0.01) compared to normal control subjects. Similarly, mean early diastolic mitral annular velocities were lower in MPS patients (7.8 +/- 0.9 vs 13.3 +/- 3.3 cm/s, p < 0.01).
CONCLUSION
MPS I patients with the attenuated phenotype have not only valvular abnormalities but also LV diastolic and systolic abnormalities.
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