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Gepubliceerd in: Netherlands Heart Journal 12/2009

01-12-2009 | original article

Reduced regional myocardial perfusion reserve is associated with impaired contractile performance in idiopathic dilated cardiomyopathy

Auteurs: R. A. Tio, R. H. J. A. Slart, R. A. de Boer, P. A. van der Vleuten, R. M. de Jong, L. M. van Wijk, T. Willems, D. D. Lubbers, A. A. Voors, D. J. van Veldhuisen

Gepubliceerd in: Netherlands Heart Journal | Uitgave 12/2009

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Abstract

Background. In idiopathic dilated cardiomyopathy (IDC) an imbalance between myocardial oxygen consumption and supply has been postulated. Subclinical myocardial ischaemia may contribute to progressive deterioration of left ventricular function. The relation between regional myocardial perfusion reserve (MPR) and contractile performance was investigated.
Methods. Patients with newly diagnosed IDC underwent positron emission tomography (PET) scanning using both 13N-ammonia as a perfusion tracer (baseline and dypiridamole stress), and 18F-fluorodeoxyglucose viability tracer and a dobutamine stress MRI. MPR (assessed by PET) as well as wall motion score (WMS, assessed by MRI) were evaluated in a 17-segment model.
Results. Twenty-two patients were included (age 49±11 years; 15 males, LVEF 33±10%). With MRI, a total of 305 segments could be analysed. Wall motion abnormalities at rest were present in 127 (35.5%) segments and in 103 (29.9%) during dobutamine stress. Twenty-one segments deteriorated during stress and 43 improved. MPR was significantly higher in those segments that improved, compared with those that did not change or were impaired during stress (1.87±0.04 vs. 1.56± 0.07 p<0.01.)
Conclusion. Signs of regional ischaemia were clearly present in IDC patients. Ischaemic regions displayed impaired contractility during stress. This suggests that impaired oxygen supply contributes to cardiac dysfunction in IDC. (Neth Heart J 2009;17:470–4.)
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Metagegevens
Titel
Reduced regional myocardial perfusion reserve is associated with impaired contractile performance in idiopathic dilated cardiomyopathy
Auteurs
R. A. Tio
R. H. J. A. Slart
R. A. de Boer
P. A. van der Vleuten
R. M. de Jong
L. M. van Wijk
T. Willems
D. D. Lubbers
A. A. Voors
D. J. van Veldhuisen
Publicatiedatum
01-12-2009
Uitgeverij
Bohn Stafleu van Loghum
Gepubliceerd in
Netherlands Heart Journal / Uitgave 12/2009
Print ISSN: 1568-5888
Elektronisch ISSN: 1876-6250
DOI
https://doi.org/10.1007/BF03086306

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