Key result
Lewy body dementia is linked to severely low ventilatory response to hypercapnia in ~100% of patients.
Why the study?
Does ventilatory response to hypercapnia differ between patients with dementia with Lewy bodies, Alzheimer's disease, and healthy controls?
Observational
Does ventilatory response to hypercapnia differ between patients with dementia with Lewy bodies, Alzheimer's disease, and healthy controls?
Ventilatory response to hypercapnia is severely reduced in patients with dementia with Lewy bodies and may serve as a promising diagnostic tool.
Answers are grounded in this paper and cite their sources.
May support hypercapnic ventilatory testing for DLB diagnosis; leaves open prospective validation before clinical adoption.
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.
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Mizukami et al. (2009) conducted an observational in Dementia with Lewy bodies. Dementia with Lewy bodies vs. Alzheimer's disease and healthy control subjects was evaluated on Severely low ventilatory response to hypercapnia. Dementia with Lewy bodies was associated with severely low ventilatory response to hypercapnia in 100% of patients (15/15), compared to 0% in Alzheimer's disease and healthy control subjects.
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