Publications by authors named "Amber van der Stam"

Introduction: Orthostatic hypotension is common in people with Parkinson's disease (PD) due to autonomic dysfunction and medication use and can have a significant negative impact on quality of life. Pharmacological treatment is often complicated due to complex blood pressure regulation problems. This case report presents a patient whose symptoms of orthostatic intolerance were successfully treated with the non-pharmacological method of head-up tilt sleeping (HUTS).

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Purpose: We studied the relative contributions of total peripheral resistance (TPR), stroke volume (SV) and heart rate (HR) to low blood pressure in classical orthostatic hypotension (cOH) on group and individual levels.

Methods: We retrospectively analyzed tilt test records from cOH patients and age/sex-matched controls. We quantified relative effects of HR, SV and TPR on mean arterial pressure (MAP) with the log-ratio method.

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Background: In persons with Parkinson's Disease (PD) or certain forms of atypical parkinsonism, orthostatic hypotension is common and disabling, yet often underrecognized and undertreated. About half of affected individuals also exhibit supine hypertension. This common co-occurrence of both orthostatic hypotension and supine hypertension complicates pharmacological treatments as the treatment of the one can aggravate the other.

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To systematically summarize the evidence of head-up tilt sleeping (HUTS) on orthostatic tolerance, we conducted a systematic, predefined search in PubMed, OVID Embase, Cochrane and Web of Science. We included studies assessing the effect of HUTS on orthostatic tolerance and other cardiovascular measures and rated the quality with the American Academy of Neurology risk of bias tool. We included 10 studies ( = 185) in four groups: orthostatic hypotension (OH; 6 studies, = 103), vasovagal syncope (1 study, = 12), nocturnal angina pectoris (1 study, = 10) and healthy subjects (2 studies, = 58).

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Mice display a wide repertoire of vocalizations that varies with sex, strain, and context. Especially during social interaction, including sexually motivated dyadic interaction, mice emit sequences of ultrasonic vocalizations (USVs) of high complexity. As animals of both sexes vocalize, a reliable attribution of USVs to their emitter is essential.

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