期刊
INTERNATIONAL JOURNAL OF GERIATRIC PSYCHIATRY
卷 30, 期 8, 页码 864-869出版社
WILEY-BLACKWELL
DOI: 10.1002/gps.4229
关键词
dementia; dementia with Lewy bodies; Alzheimer's disease; MIBG cardiac scintigraphy; sensitivity; specificity
资金
- University of Antwerp
- Foundation for Alzheimer Research (SAO-FRA)
- Institute Born-Bunge
- central Biobank facility of the Institute Born-Bunge/University Antwerp
- Janssen, Belgium
- Research Foundation-Flanders (FWO-Vlaanderen)
- Agency for Innovation by Science and Technology (IWT)
- Interuniversity Attraction Poles (IAP) program of the Belgian Science Policy Office
- Flemish Government, Belgium
- Medical Research Foundation Antwerp
- EU/EFPIA Innovative Medicines Initiative Joint Undertaking (EMIF) [115372]
ObjectiveIodine-123 metaiodobenzylguanidine (MIBG) cardiac scintigraphy has shown the potential to discriminate dementia with Lewy bodies (DLB) from Alzheimer's disease (AD). However, these studies did not reflect clinical practice, as patients with ischemic heart disease, heart failure, diabetes mellitus, arterial hypertension, and hyperlipidemia and patients treated with antidepressants like trazodone were excluded. MethodsThis study aimed to evaluate the use of MIBG cardiac scintigraphy to diagnose DLB in clinical practice. Moreover, the potential diagnostic value of MIBG cardiac scintigraphy in patients with clinically ambiguous dementia diagnosis (DLB versus AD) was tested. Eighty-five patients with a possible clinical diagnosis of DLB entered the study. MIBG uptake was determined by calculating the heart-to-mediastinum-uptake ratio (H/M). ResultsThe average H/M ratio was 1.420.35. The number of core features for DLB and the H/M ratio were negatively correlated (p=0.001; r=-0.360). With an H/M ratio cutoff of 1.68 in 20 patients with clinically ambiguous dementia diagnoses (DLB versus AD) at the moment of MIBG cardiac scintigraphy, 95% (19/20) of the patients were correctly classified as compared with clinical or definite diagnosis at follow-up, with sensitivity and specificity values for diagnosing DLB of 100% (16/16) and 75% (3/4), respectively. The H/M ratio was influenced only by age (p=0.046; r=-0.217) and gender (p=0.024) and not by any other variable studied. ConclusionsThe MIBG cardiac scintigraphy H/M ratio is a possible diagnostic biomarker for DLB in routine clinical practice and might have an added diagnostic value in case of doubt between DLB and AD. Copyright (c) 2014 John Wiley & Sons, Ltd.
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