title: Decreased ventilatory response to hypercapnia in dementia with Lewy bodies.
abstract: A systematic autonomic dysfunction observed among patients with dementia with Lewy bodies (DLB) has recently attracted close attention. Here, we compare cardiovascular and pulmonary autonomic functions among patients with DLB, patients with Alzheimer's disease, and healthy control subjects. All 15 DLB patients demonstrated severely low ventilatory response to hypercapnia, whereas none of the other subjects demonstrated abnormal results. The majority of the DLB patients showed impaired heart rate variability, low uptake on (123)I-metaiodobenzylguanidine myocardial scintigraphy, and orthostatic hypotension. Ventilatory response to hypercapnia as a marker of respiratory autonomic function is a promising diagnostic tool for DLB.
authors.affiliation: Department of Psychiatry, University of Tsukuba, Tsukuba City, Ibaraki, Japan. mizukami@md.tsukuba.ac.jp
authors.forename: Katsuyoshi
authors.initials: K
authors.lastname: Mizukami
authors.forename: Toshiaki
authors.initials: T
authors.lastname: Homma
authors.forename: Kazutaka
authors.initials: K
authors.lastname: Aonuma
authors.forename: Toru
authors.initials: T
authors.lastname: Kinoshita
authors.forename: Kenji
authors.initials: K
authors.lastname: Kosaka
authors.forename: Takashi
authors.initials: T
authors.lastname: Asada
mesh_terms: D019797:3-Iodobenzylguanidine; D000368:Aged; D000369:Aged, 80 and over; D000544:Alzheimer Disease / Q000503:physiopathology; D005260:Female; D006321:Heart / Q000000981:diagnostic imaging* / Q000503:physiopathology; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D006935:Hypercapnia / Q000209:etiology*; D007024:Hypotension, Orthostatic / Q000209:etiology; D020961:Lewy Body Disease / Q000150:complications*; D008297:Male; D055414:Myocardial Perfusion Imaging / Q000379:methods; D009483:Neuropsychological Tests; D010313:Partial Pressure; D013990:Tidal Volume / Q000502:physiology; D014691:Ventilation
chemical_list: D019797:3-Iodobenzylguanidine