E Stuebner1, E Vichayanrat, D A Low, C J Mathias, S Isenmann, C A Haensch. 1. Autonomic Laboratory, Department of Neurology and Clinical Neurophysiology, Faculty of Health, University of Witten/Herdecke, HELIOS-Klinikum Wuppertal, Wuppertal, Germany.
Abstract
BACKGROUND: Non-motor symptoms are increasingly recognized in Parkinson disease (PD) and include physical as well as psychological symptoms. A psychological condition that has been well studied in PD is psychosis. Cardiovascular autonomic dysfunction in PD can include a reversed or loss of blood pressure (BP) circadian rhythm, referred to as nocturnal non-dipping. The aim of this study was to determine the relationship between 24 h ambulatory blood pressure measurements (ABPM), i.e., absence or presence of nocturnal dipping, and psychosis scores in PD. METHODS: Twenty-one patiens with PD underwent 24 h ABPM using an autonomic protocol. A decrease in nocturnal mean arterial blood pressure of less than 10% was defined as non-dipping. Patients were interviewed (including the brief psychiatric rating scale; BPRS) for the assessment of psychosis. RESULTS: Eleven patients were dippers and 10 were non-dippers. BPRS scores were higher in non-dippers, who, on average, met the criteria for psychosis (mean non-dipper BPRS: 34.3 ± 7.3 vs mean dipper BPRS: 27.5 ± 5.3; cutoff for "mildly ill" 31). There was a correlation between BPRS scores and non-dipping, indicating that those patients who had a blunted nocturnal fall in BP were more prone to psychotic symptoms (Pearson's Correlation = 0.554, p = 0.009). CONCLUSION: These results suggest that, among PD patients, a non-dipping circadian rhythm is associated with more severe symptoms of psychosis than is a dipping circadian rhythm. This association warrants further investigation.
BACKGROUND: Non-motor symptoms are increasingly recognized in Parkinson disease (PD) and include physical as well as psychological symptoms. A psychological condition that has been well studied in PD is psychosis. Cardiovascular autonomic dysfunction in PD can include a reversed or loss of blood pressure (BP) circadian rhythm, referred to as nocturnal non-dipping. The aim of this study was to determine the relationship between 24 h ambulatory blood pressure measurements (ABPM), i.e., absence or presence of nocturnal dipping, and psychosis scores in PD. METHODS: Twenty-one patiens with PD underwent 24 h ABPM using an autonomic protocol. A decrease in nocturnal mean arterial blood pressure of less than 10% was defined as non-dipping. Patients were interviewed (including the brief psychiatric rating scale; BPRS) for the assessment of psychosis. RESULTS: Eleven patients were dippers and 10 were non-dippers. BPRS scores were higher in non-dippers, who, on average, met the criteria for psychosis (mean non-dipper BPRS: 34.3 ± 7.3 vs mean dipper BPRS: 27.5 ± 5.3; cutoff for "mildly ill" 31). There was a correlation between BPRS scores and non-dipping, indicating that those patients who had a blunted nocturnal fall in BP were more prone to psychotic symptoms (Pearson's Correlation = 0.554, p = 0.009). CONCLUSION: These results suggest that, among PDpatients, a non-dipping circadian rhythm is associated with more severe symptoms of psychosis than is a dipping circadian rhythm. This association warrants further investigation.
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