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2.
Ophthalmol Retina ; 8(7): e22-e23, 2024 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-38727669

Asunto(s)
Humanos
3.
Hosp Pediatr ; 14(5): 319-327, 2024 May 01.
Artículo en Inglés | MEDLINE | ID: mdl-38618654

RESUMEN

OBJECTIVES: Acute agitation during pediatric mental health emergency department (ED) visits presents safety risks to patients and staff. We previously convened multidisciplinary stakeholders who prioritized 20 proposed quality measures for pediatric acute agitation management. Our objectives were to assess feasibility of evaluating performance on these quality measures using electronic health record (EHR) data and to examine performance variation across 3 EDs. METHODS: At a children's hospital and 2 nonchildren's hospitals, we assessed feasibility of evaluating quality measures for pediatric acute agitation management using structured EHR data elements. We retrospectively evaluated measure performance during ED visits by children 5 to 17 years old who presented for a mental health condition, received medication for agitation, or received physical restraints from July 2020 to June 2021. Bivariate and multivariable regression were used to examine measure performance by patient characteristics and hospital. RESULTS: We identified 2785 mental health ED visits, 275 visits with medication given for agitation, and 35 visits with physical restraints. Performance was feasible to measure using EHR data for 10 measures. Nine measures varied by patient characteristics, including 4.87 times higher adjusted odds (95% confidence interval 1.28-18.54) of physical restraint use among children with versus without autism spectrum disorder. Four measures varied by hospital, with physical restraint use varying from 0.5% to 3.3% of mental health ED visits across hospitals. CONCLUSIONS: Quality of care for pediatric acute agitation management was feasible to evaluate using EHR-derived quality measures. Variation in performance across patient characteristics and hospitals highlights opportunities to improve care quality.


Asunto(s)
Registros Electrónicos de Salud , Servicio de Urgencia en Hospital , Agitación Psicomotora , Humanos , Niño , Agitación Psicomotora/terapia , Servicio de Urgencia en Hospital/normas , Femenino , Masculino , Adolescente , Preescolar , Estudios Retrospectivos , Hospitales Pediátricos , Calidad de la Atención de Salud , Estudios de Factibilidad , Restricción Física/estadística & datos numéricos , Indicadores de Calidad de la Atención de Salud
4.
Ophthalmology ; 131(4): 403-411, 2024 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-37858872

RESUMEN

PURPOSE: To assess risk factors for worse visual acuity (VA) outcomes after intraocular lens (IOL) exchange, and the most common postsurgical complications. DESIGN: Retrospective cohort study. PARTICIPANTS: Eyes from patients 18 years of age and older in the IRIS® Registry (Intelligent Research in Sight) that underwent IOL exchange in the United States between 2013 and 2019. METHODS: Vision improvement compared with baseline was determined at 1 year after surgery. A multivariable generalized estimating equation model adjusting for demographic factors and baseline vision was used to identify factors associated with VA worse than 20/40 at 1 year. MAIN OUTCOME MEASURES: Visual outcomes and postoperative complications after lens exchange. RESULTS: A total of 46 063 procedures (n = 41 925 unique patients) were included in the analysis. Overall, VA improved from a mean ± standard deviation (SD) of 0.53 ± 0.58 logarithm of the minimum angle of resolution (logMAR; Snellen equivalent, 20/70) before surgery to a mean ± SD of 0.31 ± 0.40 logMAR (Snellen equivalent, 20/40) at 1 year. Among eyes with VA recorded at both baseline and 1 year after surgery, 60.5% achieved VA of 20/40 or better at 1 year. Vision of worse than 20/40 at 1 year was associated with greater age (odds ratio [OR], 1.16 per 5-year increase; 95% confidence interval [CI], 1.14-1.18) and higher logMAR baseline VA (OR, 1.14 per 0.1-logMAR increase; 95% CI, 1.14-1.15), as well as Black or African American (OR, 1.96; 95% CI, 1.68-2.28), Hispanic (OR, 1.82; 95% CI, 1.59-2.08), and Asian (OR, 1.48; 95% CI, 1.21-1.81) race or ethnicity versus White race, Medicaid (OR, 1.78; 95% CI, 1.40-2.25) versus private insurance, smoking history (OR, 1.22; 95% CI, 1.11-1.35), and concurrent anterior (OR, 1.65; 95% CI, 1.51-1.81) and posterior (OR, 1.53; 95% CI, 1.41-1.66) vitrectomy versus no vitrectomy. Female sex was associated with better VA at 1 year. At 1 year, epiretinal membrane (10.9%), mechanical lens complication (9.4%), and dislocation of the replacement lens (7.1%) were the most common complications. CONCLUSIONS: In this large national cohort, the annual number of IOL exchanges rose steadily over time. Vision improved in 60.2% of patients; worse visual outcomes were associated with greater age, worse baseline vision, Black race, Hispanic ethnicity, Medicaid insurance, smoking, and concurrent vitrectomy. Epiretinal membrane was the most common complication. FINANCIAL DISCLOSURE(S): Proprietary or commercial disclosure may be found in the Footnotes and Disclosures at the end of this article.


Asunto(s)
Membrana Epirretinal , Lentes Intraoculares , Humanos , Femenino , Adolescente , Adulto , Implantación de Lentes Intraoculares/efectos adversos , Estudios Retrospectivos , Membrana Epirretinal/etiología , Agudeza Visual , Sistema de Registros
5.
Am J Ophthalmol ; 259: 131-140, 2024 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-37944688

RESUMEN

PURPOSE: To assess the prevalence and risk factors of blindness among patients newly diagnosed with primary angle closure glaucoma (PACG) in the United States. DESIGN: Retrospective cross-sectional study. METHODS: Eligible patients from the American Academy of Ophthalmology (AAO) Intelligent Research in Sight (IRIS) Registry had newly diagnosed PACG, defined as: 1) observable during a 24-month lookback period from index date of PACG diagnosis; 2) no history of eye drops, laser, or cataract surgery unless preceded by a diagnosis of anatomical narrow angle (ANA); and 3) no history of glaucoma surgery. Logistic regression models were developed to identify risk factors for any (one or both eyes) or bilateral (both eyes) blindness (visual acuity ≤20/200) at first diagnosis of PACG. RESULTS: Among 43,901 eligible patients, overall prevalence of any and bilateral blindness were 11.5% and 1.8%, respectively. Black and Hispanic patients were at higher risk of any (odds ratios [ORs] 1.42 and 1.21, respectively; P < .001) and bilateral (ORs 2.04 and 1.53, respectively; P < .001) blindness compared with non-Hispanic White patients adjusted for ocular comorbidities. Age <50 or >80 years, male sex, Medicaid or Medicare insurance product, and Southern or Western practice region also conferred a higher risk of blindness (OR > 1.28; P ≤ .01). CONCLUSIONS: Blindness affects 1 of 9 patients with newly diagnosed PACG in the IRIS Registry. Black and Hispanic patients and Medicaid and Medicare recipients are at significantly higher risk. These findings highlight the severe ocular morbidity among patients with PACG and the need for improved disease awareness and detection methods.


Asunto(s)
Glaucoma de Ángulo Cerrado , Presión Intraocular , Humanos , Masculino , Anciano , Estados Unidos/epidemiología , Anciano de 80 o más Años , Glaucoma de Ángulo Cerrado/complicaciones , Glaucoma de Ángulo Cerrado/diagnóstico , Glaucoma de Ángulo Cerrado/epidemiología , Estudios Retrospectivos , Prevalencia , Estudios Transversales , Medicare , Ceguera/epidemiología , Ceguera/etiología , Factores de Riesgo , Sistema de Registros
7.
Pediatrics ; 152(1)2023 Jul 01.
Artículo en Inglés | MEDLINE | ID: mdl-37317809

RESUMEN

BACKGROUND AND OBJECTIVES: Pediatric mental health emergency department (ED) visits are rising in the United States, with more visits involving medication for acute agitation. Timely, standardized implementation of behavioral strategies and medications may reduce the need for physical restraint. Our objective was to standardize agitation management in a pediatric ED and reduce time in physical restraints. METHODS: A multidisciplinary team conducted a quality improvement initiative from September 2020 to August 2021, followed by a 6-month maintenance period. A barrier assessment revealed that agitation triggers were inadequately recognized, few activities were offered during long ED visits, staff lacked confidence in verbal deescalation techniques, medication choices were inconsistent, and medications were slow to take effect. Sequential interventions included development of an agitation care pathway and order set, optimization of child life and psychiatry workflows, implementation of personalized deescalation plans, and adding droperidol to the formulary. Measures include standardization of medication choice for severe agitation and time in physical restraints. RESULTS: During the intervention and maintenance periods, there were 129 ED visits with medication given for severe agitation and 10 ED visits with physical restraint use. Among ED visits with medication given for severe agitation, standardized medication choice (olanzapine or droperidol) increased from 8% to 88%. Mean minutes in physical restraints decreased from 173 to 71. CONCLUSIONS: Implementing an agitation care pathway standardized and improved care for a vulnerable and high-priority population. Future studies are needed to translate interventions to community ED settings and to evaluate optimal management strategies for pediatric acute agitation.


Asunto(s)
Droperidol , Mejoramiento de la Calidad , Humanos , Niño , Estados Unidos , Droperidol/uso terapéutico , Agitación Psicomotora/terapia , Servicio de Urgencia en Hospital , Restricción Física
8.
Ophthalmol Retina ; 7(8): 713-720, 2023 08.
Artículo en Inglés | MEDLINE | ID: mdl-37080486

RESUMEN

OBJECTIVE: To determine the timing of delayed retinal pathology in eyes presenting with acute posterior vitreous detachment (PVD). DESIGN: Retrospective database study. SUBJECTS: Patients in the Intelligent Research in Sight (IRIS) registry found to have acute PVD based on the International Classification of Diseases, Ninth and Tenth Revision, codes were followed. METHODS: Patients coded to have a PVD from 2013 to 2018 along with common procedural technology coding of extended ophthalmoscopy were included. Ocular baseline characteristics included visual acuity, lens status, presence or absence of vitreous hemorrhage, myopia, lattice degeneration, and subspecialty training of the treating physician. MAIN OUTCOME MEASURES: Timing (days) to delayed retinal break or detachment RESULTS: A total of 434 046 eyes met inclusion/exclusion criteria, and 10 518 eyes (2.42%) presented with a delayed retinal break or detachment after initial PVD. The median time to retinal break and detachment after initial PVD was 42 (range, 1-365) days and 51 (range, 1-365) days, respectively. Eyes with vitreous hemorrhage (hazard ratio [HR], 9.30; 95% confidence interval [CI], 8.50-10.2), history of retinal break/retinal detachment in the fellow eye (HR, 3.91; 95% CI, 3.64-4.20), lattice degeneration (HR, 2.61; 95% CI, 2.35-2.90), and myopia (HR, 1.42; 95% CI, 1.33-1.53) were found to be at a higher risk of developing delayed break or detachment. CONCLUSIONS: Follow-up examination after initial PVD is necessary to diagnose delayed or missed retinal pathology. In eyes with no initial pathology, providers should consider repeat examination at least once within 6 weeks, and sooner for eyes with higher-risk features. FINANCIAL DISCLOSURE(S): Proprietary or commercial disclosure may be found after the references.


Asunto(s)
Miopía , Degeneración Retiniana , Desprendimiento de Retina , Perforaciones de la Retina , Desprendimiento del Vítreo , Humanos , Perforaciones de la Retina/diagnóstico , Desprendimiento del Vítreo/diagnóstico , Estudios Retrospectivos , Hemorragia Vítrea/diagnóstico , Hemorragia Vítrea/etiología , Desprendimiento de Retina/diagnóstico
11.
J Clin Neurophysiol ; 39(7): 561-566, 2022 Nov 01.
Artículo en Inglés | MEDLINE | ID: mdl-33878059

RESUMEN

PURPOSE: To survey US Clinical Neurophysiology (CNP) fellowship program directors on the nature of CNP and related training programs, current recruitment cycle, and views for a standardized process. METHODS: A 23-question electronic survey was sent to all 93 US Accreditation Council for Graduate Medical Education-accredited CNP fellowship program directors from December 2020 to January 2021. RESULTS: The response rate was 60%. There was great variability in the number of CNP positions and CNP tracks offered. The following tracks were identified: 48% EEG dominant, 26% EMG dominant, 22% split equally between EEG and EMG, and 2% and 1% were neurophysiologic intraoperative monitoring and autonomic dominant, respectively. Of the responding institutions, 43% offered a second year of training options to CNP fellows, mainly in conjunction with Epilepsy fellowship, which was pursued by 25% of CNP fellows. Many programs indicated flexibility in their design between different CNP tracks or between CNP and other related training programs based on the available candidates. The median percentage of CNP fellowship positions filled over the last 5 years was 80%, and there was great variation in the recruitment timeline across institutions. Overall, 86% of program directors favored a universal timeline and 71% favored a formal match for CNP. The respondents were split between an independent CNP match (39%) and joining the initiatives of affiliate societies on a standardized process (61%). CONCLUSIONS: There is significant heterogeneity in the makeup of the CNP fellowship programs and the recruitment process. The majority of CNP program directors are in favor of standardization of the recruitment process.


Asunto(s)
Becas , Neurofisiología , Humanos , Estados Unidos , Educación de Postgrado en Medicina , Encuestas y Cuestionarios
12.
Dermatol Ther ; 34(6): e15138, 2021 11.
Artículo en Inglés | MEDLINE | ID: mdl-34549494

RESUMEN

Cutaneous involvement of the scalp is a common manifestation of dermatomyositis (DM), occurring in up to 82% of adults with DM. Scalp DM predominantly affects women and is characterized by dermatitis, alopecia, pruritus, and/or burning. While cutaneous DM negatively impacts quality-of-life, scalp symptoms in particular are often severe, debilitating, and recalcitrant to standard DM therapies. Currently, there is a paucity of guidelines to inform management of scalp symptoms in patients with cutaneous DM. In this narrative review, we summarize the treatments utilized to manage scalp DM and highlight potential areas for future research. We identified eight studies that reported on 27 treatments focused on cutaneous DM and described outcomes on scalp symptoms. A majority of the treatments were standard therapies for cutaneous DM and resulted in no or minimal improvement in scalp symptoms. Five therapies did result in complete resolution of scalp symptoms and were recommended as potential areas of future research. These included low-dose naltrexone and platelet-rich plasma, as well as two frequent and one less common therapy for cutaneous DM respectively: intravenous immunoglobulin, rituximab, and apremilast. Though the literature was not systematically assessed in this review, these findings illustrate not only that strategies for refractory scalp DM are lacking, but also that those demonstrating potential efficacy are limited by low levels of evidence. Additional studies, especially randomized controlled trials, are needed to better inform management of scalp DM.


Asunto(s)
Dermatomiositis , Adulto , Dermatomiositis/diagnóstico , Dermatomiositis/tratamiento farmacológico , Femenino , Humanos , Inmunoglobulinas Intravenosas/uso terapéutico , Rituximab/uso terapéutico , Cuero Cabelludo , Piel
13.
Epilepsy Behav ; 122: 108067, 2021 09.
Artículo en Inglés | MEDLINE | ID: mdl-34147022

RESUMEN

OBJECTIVE: To determine whether the standardization and implementation of an ictal testing protocol in the Epilepsy Monitoring Unit (EMU) leads to improvements in ictal testing performance. METHODS: Ictal assessments completed in the EMU from a single center were retrospectively reviewed over a two-month period. Each assessment was evaluated to determine whether 8 high-yield aspects of the ictal assessment were performed. Following observation of performance, a standardized ictal testing protocol was developed based on a root cause analysis and review of consensus guidelines. This protocol was disseminated to staff in conjunction with an annual epilepsy education seminar. Ictal assessment performance was re-assessed during the subsequent two months (short-term follow-up) and again during a five- to seven-month period (long-term follow-up) beyond the initial intervention. For sub-group analysis, event characteristics (event type, time of assessment) and patient characteristics (age, gender) were also evaluated and analyzed in relation to ictal testing performance. RESULTS: All eight individual ictal testing elements were more likely to be assessed in short-term and long-term follow-up periods when compared to pre-intervention assessments. The cumulative difference in ictal testing was 20.4% (95% CI 3.7-37.2, p = 0.02) greater for the short-term period and 16.7% (95% CI -0.3% to 33.8%, p = 0.05) greater in the long-term period when compared to baseline testing. CONCLUSIONS: Utilization of a standardized ictal testing battery in conjunction with staff education leads to an objective improvement in ictal assessment performance. Further research is warranted to assess the replicability of our findings.


Asunto(s)
Epilepsia , Convulsiones , Electroencefalografía , Epilepsia/diagnóstico , Humanos , Monitoreo Fisiológico , Estándares de Referencia , Estudios Retrospectivos
14.
J Vis Exp ; (169)2021 03 27.
Artículo en Inglés | MEDLINE | ID: mdl-33843929

RESUMEN

Patients with ion channelopathies are at a high risk of developing seizures and fatal cardiac arrhythmias. There is a higher prevalence of heart disease and arrhythmias in people with epilepsy (i.e., epileptic heart.) Additionally, cardiac and autonomic disturbances have been reported surrounding seizures. 1:1,000 epilepsy patients/year die of sudden unexpected death in epilepsy (SUDEP). The mechanisms for SUDEP remain incompletely understood. Electroencephalograms (EEG) and electrocardiograms (ECG) are two techniques routinely used in the clinical setting to detect and study the substrates/triggers for seizures and arrhythmias. While many studies and descriptions of this methodology are in rodents, their cardiac electrical activity differs significantly from humans. This article provides a description of a non-invasive method for recording simultaneous video-EEG-ECG-oximetry-capnography in conscious rabbits. As cardiac electrical function is similar in rabbits and humans, rabbits provide an excellent model of translational diagnostic and therapeutic studies. In addition to outlining the methodology for data acquisition, we discuss the analytical approaches for examining neuro-cardiac electrical function and pathology in rabbits. This includes arrhythmia detection, spectral analysis of EEG and a seizure scale developed for restrained rabbits.


Asunto(s)
Apnea/diagnóstico , Arritmias Cardíacas/diagnóstico , Convulsiones/diagnóstico , Animales , Conejos , Restricción Física
15.
Cancer Control ; 25(1): 1073274818806900, 2018.
Artículo en Inglés | MEDLINE | ID: mdl-30375235

RESUMEN

Despite guidelines recommending annual low-dose computed tomography (LDCT) screening for lung cancer, uptake remains low due to the perceived complexity of initiating and maintaining a clinical program-problems that likely magnify in underserved populations. We conducted a survey of community providers at Federally Qualified Health Centers (FQHCs) in Santa Clara County, California, to evaluate provider-related factors that affect adherence. We then compared these findings to academic providers' (APs) LDCT screening knowledge, behaviors, and attitudes at an academic referral center in the same county. The 4 FQHCs enrolled care for 80 000 patients largely of minority descent and insured by Medi-Cal. Of the 75 FQHC providers (FQHCPs), 36 (48%) completed the survey. Of the 36 providers, 8 (22%) knew screening criteria. Fifteen (42%) FQHCPs discussed LDCT screening with patients. Compared to 36 APs, FQHCPs were more concerned about harms, false positives, discussion time, patient apathy, insurance coverage, and a lack of expertise for screening and follow-up. Yet, more FQHCPs thought screening was effective (27 [75%] of 36) compared to APs ( P = .0003). In conclusion, provider knowledge gaps are greater and barriers are different for community clinics caring for underserved populations compared to their academic counterparts, but practical and scalable solutions exist to enhance adoption.


Asunto(s)
Centros Médicos Académicos/estadística & datos numéricos , Competencia Clínica , Centros Comunitarios de Salud/estadística & datos numéricos , Detección Precoz del Cáncer/normas , Neoplasias Pulmonares/diagnóstico por imagen , Pautas de la Práctica en Medicina/estadística & datos numéricos , California , Detección Precoz del Cáncer/efectos adversos , Detección Precoz del Cáncer/estadística & datos numéricos , Reacciones Falso Positivas , Femenino , Adhesión a Directriz/estadística & datos numéricos , Humanos , Pulmón/diagnóstico por imagen , Pulmón/efectos de la radiación , Masculino , Guías de Práctica Clínica como Asunto , Pautas de la Práctica en Medicina/normas , Encuestas y Cuestionarios/estadística & datos numéricos , Tomografía Computarizada por Rayos X/efectos adversos , Tomografía Computarizada por Rayos X/normas , Tomografía Computarizada por Rayos X/estadística & datos numéricos
16.
Seizure ; 52: 199-204, 2017 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-29073585

RESUMEN

PURPOSE: Due to the complex pharmacokinetic profiles of phenytoin (PHT) and fosphenytoin (FOS), achieving sustained, targeted serum PHT levels in the first day of use is challenging. METHODS: A population based approach was used to analyze total serum PHT (tPHT) level within 2-24h of PHT/FOS loading with or without supplementary maintenance or additional loading doses among PHT-naïve patients in the acute hospital setting. Adequate tPHT serum level was defined as ≥20µg/mL. RESULTS: Among 494 patients with 545 tPHT serum levels obtained in the first 2-24h after the loading dose (LD), tPHT serum levels of either

Asunto(s)
Anticonvulsivantes/sangre , Anticonvulsivantes/uso terapéutico , Epilepsia/sangre , Epilepsia/tratamiento farmacológico , Fenitoína/sangre , Fenitoína/uso terapéutico , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Niño , Planificación en Salud Comunitaria , Femenino , Humanos , Masculino , Persona de Mediana Edad , Estudios Retrospectivos , Estadística como Asunto , Adulto Joven
17.
Curr Biol ; 27(17): 2684-2691.e7, 2017 Sep 11.
Artículo en Inglés | MEDLINE | ID: mdl-28844645

RESUMEN

Prior research using functional magnetic resonance imaging (fMRI) [1-4] and behavioral studies of patients with acquired or congenital amusia [5-8] suggest that the right posterior superior temporal gyrus (STG) in the human brain is specialized for aspects of music processing (for review, see [9-12]). Intracranial electrical brain stimulation in awake neurosurgery patients is a powerful means to determine the computations supported by specific brain regions and networks [13-21] because it provides reversible causal evidence with high spatial resolution (for review, see [22, 23]). Prior intracranial stimulation or cortical cooling studies have investigated musical abilities related to reading music scores [13, 14] and singing familiar songs [24, 25]. However, individuals with amusia (congenitally, or from a brain injury) have difficulty humming melodies but can be spared for singing familiar songs with familiar lyrics [26]. Here we report a detailed study of a musician with a low-grade tumor in the right temporal lobe. Functional MRI was used pre-operatively to localize music processing to the right STG, and the patient subsequently underwent awake intraoperative mapping using direct electrical stimulation during a melody repetition task. Stimulation of the right STG induced "music arrest" and errors in pitch but did not affect language processing. These findings provide causal evidence for the functional segregation of music and language processing in the human brain and confirm a specific role of the right STG in melody processing. VIDEO ABSTRACT.


Asunto(s)
Percepción Auditiva/fisiología , Trastornos de la Percepción Auditiva/fisiopatología , Lóbulo Temporal/fisiopatología , Adulto , Trastornos de la Percepción Auditiva/etiología , Neoplasias Encefálicas/complicaciones , Estimulación Eléctrica , Femenino , Humanos , Imagen por Resonancia Magnética , Masculino , Música , Adulto Joven
18.
Anesth Analg ; 121(3): 652-660, 2015 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-26200465

RESUMEN

BACKGROUND: Physostigmine, a centrally acting acetylcholinesterase inhibitor, is most commonly used by anesthesiologists in the postanesthetic setting to reverse confusion caused by central anticholinergic medication effects. It has also been proposed as a treatment for sleep-disordered breathing. We investigated whether physostigmine was effective in decreasing the frequency of ventilatory arrhythmias produced during moderate sedation with midazolam and remifentanil during the conditions of breathing room air or 2 L/min nasal O2. METHODS: Ten healthy male volunteers participated in this randomized, double-blind control trial of physostigmine (0.24 µg·kg·min) versus placebo. Moderate sedation was achieved with infusions of midazolam and remifentanil and monitored with full and processed electroencephalogram. Analgesia was quantified with subjective pain score to thermal stimulation. Ventilatory arrhythmias, as measured by the sedation apnea-hypopnea index (S-AHI), were scored as the number of apneas and hypopneas during two 1-hour periods on room air or 2 L/min nasal O2. RESULTS: All subjects tolerated the sedation and physostigmine without significant adverse effects. Sedation during placebo infusion resulted in clinically significant (S-AHI > 15) ventilatory arrhythmias in 5 conditions in 3 subjects (2 on room air and then O2, and 1 on O2 only). Physostigmine did not significantly (P > 0.46) reduce the total number of ventilatory arrhythmias on either room air or O2 (13.4 ± 18.8 events/h [mean ± SEM], 95% confidence interval [CI] = -9.9 to 62.7; and 6.2 ± 8.0, 95% CI = -3.1 to 28.7, respectively). Physostigmine did reduce the S-AHI in all 5 instances of clinically significant ventilatory arrhythmias (S-AHI decreased by 67.0 ± 22.2; CI = 29.2-111.7; P = 0.04). CONCLUSIONS: Physostigmine does not appear to be useful as a pretreatment to prevent ventilatory arrhythmias during moderate sedation. However, it may be useful as a treatment for clinically significant ventilatory arrhythmias during moderate sedation.


Asunto(s)
Arritmias Cardíacas/inducido químicamente , Arritmias Cardíacas/prevención & control , Sedación Consciente/métodos , Hipnóticos y Sedantes/administración & dosificación , Fisostigmina/administración & dosificación , Adulto , Inhibidores de la Colinesterasa/administración & dosificación , Sedación Consciente/efectos adversos , Método Doble Ciego , Humanos , Masculino , Estudios Prospectivos , Adulto Joven
19.
Curr Hypertens Rep ; 17(3): 19, 2015 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-25754323

RESUMEN

Hypertension is a complex syndrome that increases the risk of developing other medical comorbidities and interacts with other medical conditions to increase the risk of target end-organ damage such as cardiovascular disease, stroke, and renal disease. Hypertension remains under-recognized and poorly controlled in the USA and worldwide. In some patients, hypertension is resistant to optimal medical therapy. Over the last few decades, there has been an increasing understanding of the role of the sympathetic nervous system in the development and maintenance of hypertension. This update reviews the physiology and role of the sympathetic nervous system in hypertension and pharmacological and interventional treatments directed at nervous system involvement in secondary hypertension.


Asunto(s)
Barorreflejo , Hipertensión/fisiopatología , Adrenérgicos/uso terapéutico , Antihipertensivos/uso terapéutico , Humanos , Hipertensión/tratamiento farmacológico , Riñón/inervación , Riñón/fisiopatología , Sistema Nervioso Simpático/fisiopatología
20.
J Biol Chem ; 289(6): 3294-306, 2014 Feb 07.
Artículo en Inglés | MEDLINE | ID: mdl-24338010

RESUMEN

NPP4 is a type I extracellular membrane protein on brain vascular endothelium inducing platelet aggregation via the hydrolysis of Ap3A, whereas NPP1 is a type II extracellular membrane protein principally present on the surface of chondrocytes that regulates tissue mineralization. To understand the metabolism of purinergic signals resulting in the physiologic activities of the two enzymes, we report the high resolution crystal structure of human NPP4 and explore the molecular basis of its substrate specificity with NPP1. Both enzymes cleave Ap3A, but only NPP1 can hydrolyze ATP. Comparative structural analysis reveals a tripartite lysine claw in NPP1 that stabilizes the terminal phosphate of ATP, whereas the corresponding region of NPP4 contains features that hinder this binding orientation, thereby inhibiting ATP hydrolysis. Furthermore, we show that NPP1 is unable to induce platelet aggregation at physiologic concentrations reported in human blood, but it could stimulate platelet aggregation if localized at low nanomolar concentrations on vascular endothelium. The combined studies expand our understanding of NPP1 and NPP4 substrate specificity and range and provide a rational mechanism by which polymorphisms in NPP1 confer stroke resistance.


Asunto(s)
Adenosina Trifosfato/química , Fosfatos de Dinucleósidos/química , Hidrolasas Diéster Fosfóricas/química , Pirofosfatasas/química , Accidente Cerebrovascular/enzimología , Adenosina Trifosfato/genética , Adenosina Trifosfato/metabolismo , Plaquetas/enzimología , Plaquetas/patología , Encéfalo/enzimología , Encéfalo/patología , Fosfatos de Dinucleósidos/genética , Fosfatos de Dinucleósidos/metabolismo , Endotelio Vascular/enzimología , Endotelio Vascular/patología , Endotelio Vascular/fisiología , Humanos , Hidrolasas Diéster Fosfóricas/genética , Hidrolasas Diéster Fosfóricas/metabolismo , Agregación Plaquetaria/genética , Polimorfismo Genético , Estructura Terciaria de Proteína , Pirofosfatasas/genética , Pirofosfatasas/metabolismo , Accidente Cerebrovascular/genética , Accidente Cerebrovascular/patología , Especificidad por Sustrato
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