ABSTRACT
BACKGROUND: Delirium has important etiological, prognostic, and therapeutic implications. The study of neurochemical markers in this condition is relevant to the understanding of its pathophysiology. The assessment of the dopamine system is particularly relevant, as dopamine antagonists are the most used drugs in delirium. AIM: To analyze neurotransmission markers in patients with delirium, focusing in the dopamine metabolite, homovanillic acid. METHODS: A case-control study was performed at the National Institute of Neurology and Neurosurgery, Mexico, including hospitalized patients in which lumbar puncture was obtained for diagnostic purposes. Cases were selected if they fulfilled DSM-5 criteria for delirium. Age-paired controls were patients in which delirium was ruled out, selected at the same clinical scenario, during the same period. Neurological and systemic diagnoses were registered. Delirium was assessed using the DRS-98-R instrument. The dopamine metabolite, homovanillic acid (HVA), was measured by means of high-performance liquid chromatography. Other neurotransmission markers were also measured (5-hydroxyindoleacetic acid, glutamate, aspartate, GABA, glycine, arginine, citrulline, nitrites, and nitrates). A logistic regression model was used to determine pathogenic factors associated with the presence of delirium. RESULTS: 68 neurological patients with delirium and 68 patients without delirium were included. Higher homovanillic acid levels in cerebrospinal fluid were significantly associated with delirium. This result was significant after a subanalysis in patients without exposure to antipsychotics. Male gender and autoimmune limbic encephalitis were also associated with the presence of delirium. CONCLUSIONS: In hospitalized neurological patients, dopaminergic hyperactivity and autoimmune limbic encephalitis are pathogenic factors associated with the presence of delirium.
Subject(s)
Delirium/pathology , Dopamine/metabolism , Homovanillic Acid/cerebrospinal fluid , Homovanillic Acid/metabolism , Synaptic Transmission/physiology , Adult , Autoimmune Diseases/pathology , Biomarkers/metabolism , Case-Control Studies , Delirium/diagnosis , Delirium/drug therapy , Dopamine Antagonists/therapeutic use , Female , Humans , Hydroxyindoleacetic Acid , Limbic Encephalitis/pathology , Male , MexicoABSTRACT
OBJECTIVE: Brain pathologies are frequent sources of mental and behavioral disorders. In order to analyze the boundary between neurology and psychiatry, we analyzed all neuropsychiatric consultations seen at the inpatient Neurology, Neurosurgery, Critical Medicine and Neurological Emergencies clinics of the National Institute of Neurology and Neurosurgery of Mexico between 2007 and 2009. RESULTS: A total of 506 neuropsychiatric visits were included, patient mean age was 44.2 years (SD 17 years) 240 patients were female (47.4%). The main neurological disorders for which patients sought medical care at the neuropsychiatry service, were: brain tumors (14.2%), viral encephalitis (8.7%), ischaemic cerebrovascular disorders (7.1%), epilepsy (6.5%) and haemorragic cerebrovascular disorders (4.7%). The most common DSM-IV psychiatric diagnoses included: delirium (38.5%), depressive disorders (15%), dementia (7.7%), cognitive decline, without fulfilling criteria for dementia (6.5%), and anxiety disorders (6.9%). Delirium was the most common neuropsychiatric condition among the etiological groups. Catatonic syndrome was more frequent among patients with brain infections (p < 0.001), and pathological laughter and crying were more frequent among atients with cerebrovascular disorders (p = 0.012). CONCLUSIONS: Our study highlights the clinical relevance of delirium, depression, anxiety, dementia, frontal syndromes and catatonia among neurologic and neurosurgical in-patients attending a tertiary care reference center in Mexico.
Subject(s)
Central Nervous System Diseases , Interdisciplinary Communication , Neurology , Psychiatry , Adult , Central Nervous System Diseases/diagnosis , Central Nervous System Diseases/epidemiology , Cross-Sectional Studies , Female , Humans , Male , Prospective StudiesABSTRACT
Objetivo: Las enfermedades cerebrales condicionan con frecuencia alteraciones mentales y conductuales. Para analizar el área de interfase entre la neurología y la psiquiatría, analizamos todas las interconsultas neuropsiquiátricas realizadas en los servicios de Neurología, Neurocirugía, Terapia Intensiva Neurológica y Urgencias Neurológicas, en el Instituto Nacional de Neurología y Neurocirugía de México (2007-2009). Resultados: En 506 casos, la edad promedio fue 44.24 años (DE 17 años); 240 fueron mujeres (47.4 %). Las patologías neurológicas que generaron más interconsultas fueron neoplasias del sistema nervioso central (14.2 %), encefalitis viral (8.7 %), enfermedad vascular cerebral isquémica (7.1 %), epilepsia (6.5 %) y enfermedad vascular cerebral hemorrágica (4.7 %). Los trastornos mentales más frecuentes (de acuerdo con el DSM-IV) fueron delirium (38.5 %), trastorno depresivo (15 %), demencia (7.7 %), deterioro cognoscitivo, sin criterios de demencia (6.5 %), trastorno de ansiedad (6.9 %). El delirium fue la condición neuropsiquiátrica más frecuente independientemente de las categorías etiológicas. En las infecciones cerebrales hubo mayor frecuencia del síndrome catatónico (p < 0.001). En pacientes con enfermedad vascular cerebral se manifiesta más frecuentemente la risa y el llanto patológico (p = 0.012). Conclusiones: Este estudio muestra la relevancia clínica del delirium, la depresión, la ansiedad, la demencia, los síndromes frontales y la catatonia en pacientes hospitalizados con enfermedades neurológicas y psiquiátricas.
OBJECTIVE: Brain pathologies are frequent sources of mental and behavioral disorders. In order to analyze the boundary between neurology and psychiatry, we analyzed all neuropsychiatric consultations seen at the inpatient Neurology, Neurosurgery, Critical Medicine and Neurological Emergencies clinics of the National Institute of Neurology and Neurosurgery of Mexico between 2007 and 2009. RESULTS: A total of 506 neuropsychiatric visits were included, patient mean age was 44.2 years (SD 17 years) 240 patients were female (47.4%). The main neurological disorders for which patients sought medical care at the neuropsychiatry service, were: brain tumors (14.2%), viral encephalitis (8.7%), ischaemic cerebrovascular disorders (7.1%), epilepsy (6.5%) and haemorragic cerebrovascular disorders (4.7%). The most common DSM-IV psychiatric diagnoses included: delirium (38.5%), depressive disorders (15%), dementia (7.7%), cognitive decline, without fulfilling criteria for dementia (6.5%), and anxiety disorders (6.9%). Delirium was the most common neuropsychiatric condition among the etiological groups. Catatonic syndrome was more frequent among patients with brain infections (p < 0.001), and pathological laughter and crying were more frequent among atients with cerebrovascular disorders (p = 0.012). CONCLUSIONS: Our study highlights the clinical relevance of delirium, depression, anxiety, dementia, frontal syndromes and catatonia among neurologic and neurosurgical in-patients attending a tertiary care reference center in Mexico.
