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1.
Arch Microbiol ; 206(6): 284, 2024 May 30.
Artículo en Inglés | MEDLINE | ID: mdl-38814366

RESUMEN

The tea plant, Camellia sinensis [L.] O. Kuntze, is a vital global agricultural commodity, yet faces challenges from fungal infections, which affects its production. To reduce the loss in the tea production, the fungal infections must be removed which is managed with fungicides, which are harmful to the environment. Leaf necrosis, which decreases tea quality and quantity, was investigated across Assam, revealing Lasiodiplodia theobromae as the causative agent. Pathogenicity tests, alongside morphological and molecular analyses, confirmed its role in leaf necrosis. Genome and gene analysis of L. theobromae showed multiple genes related to its pathogenicity. The study also assessed the impact of chemical pesticides on this pathogen. Additionally, the findings in this study highlight the significance of re-assessing management approaches in considering the fungal infection in tea.


Asunto(s)
Ascomicetos , Camellia sinensis , Enfermedades de las Plantas , Hojas de la Planta , Camellia sinensis/microbiología , Ascomicetos/genética , Ascomicetos/aislamiento & purificación , Enfermedades de las Plantas/microbiología , India , Hojas de la Planta/microbiología , Fungicidas Industriales/farmacología
2.
Arterioscler Thromb Vasc Biol ; 43(9): 1626-1635, 2023 09.
Artículo en Inglés | MEDLINE | ID: mdl-37381983

RESUMEN

BACKGROUND: Impairments in carbohydrate, lipid, and amino acid metabolism drive features of plaque instability. However, where these impairments occur within the atheroma remains largely unknown. Therefore, we sought to characterize the spatial distribution of metabolites within stable and unstable atherosclerosis in both the fibrous cap and necrotic core. METHODS: Atherosclerotic tissue specimens from 9 unmatched individuals were scored based on the Stary classification scale and subdivided into stable and unstable atheromas. After performing mass spectrometry imaging on these samples, we identified over 850 metabolite-related peaks. Using MetaboScape, METASPACE, and Human Metabolome Database, we confidently annotated 170 of these metabolites and found over 60 of these were different between stable and unstable atheromas. We then integrated these results with an RNA-sequencing data set comparing stable and unstable human atherosclerosis. RESULTS: Upon integrating our mass spectrometry imaging results with the RNA-sequencing data set, we discovered that pathways related to lipid metabolism and long-chain fatty acids were enriched in stable plaques, whereas reactive oxygen species, aromatic amino acid, and tryptophan metabolism were increased in unstable plaques. In addition, acylcarnitines and acylglycines were increased in stable plaques whereas tryptophan metabolites were enriched in unstable plaques. Evaluating spatial differences in stable plaques revealed lactic acid in the necrotic core, whereas pyruvic acid was elevated in the fibrous cap. In unstable plaques, 5-hydroxyindoleacetic acid was enriched in the fibrous cap. CONCLUSIONS: Our work here represents the first step to defining an atlas of metabolic pathways involved in plaque destabilization in human atherosclerosis. We anticipate this will be a valuable resource and open new avenues of research in cardiovascular disease.


Asunto(s)
Aterosclerosis , Placa Aterosclerótica , Humanos , Placa Aterosclerótica/química , Triptófano , Aterosclerosis/diagnóstico por imagen , Espectrometría de Masas , Necrosis , ARN
3.
J Gen Intern Med ; 38(5): 1207-1213, 2023 04.
Artículo en Inglés | MEDLINE | ID: mdl-36344645

RESUMEN

BACKGROUND: Housing instability is a key social determinant of health and has been linked to adverse short- and long-term health. Eviction reflects a severe form of housing instability and disproportionately affects minority and women residents in the USA; however, its relationship with mortality has not previously been described. OBJECTIVE: To evaluate the independent association of county-level eviction rates with all-cause mortality in the USA after adjustment for county demographic, socioeconomic, and health-related characteristics. DESIGN: Cross-sectional. PARTICIPANTS: Six hundred eighty-six US counties with available 2016 county-level eviction and mortality data. EXPOSURE: 2016 US county-level eviction rate. OUTCOME: 2016 US county-level age-adjusted all-cause mortality. KEY RESULTS: Among 686 counties (66.1 million residents, 50.5% [49.7-51.2] women, 2% [0.5-11.1] Black race) with available eviction and mortality data in 2016, we observed a significant and graded relationship between county-level eviction rate and all-cause mortality. Counties in the highest eviction tertile demonstrated a greater proportion of residents of Black race and women and a higher prevalence of poverty and comorbid health conditions. After adjustment for county-level sociodemographic traits and prevalent comorbid health conditions, age-adjusted all-cause mortality was highest among counties in the highest eviction tertile (Tertile 3 vs 1 (per 100,000 people) 33.57: 95% CI: 10.5-56.6 p=.004). Consistent results were observed in continuous analysis of eviction, with all-cause mortality increasing by 9.32 deaths per 100,000 people (4.77, 13.89, p<.0001) for every 1% increase in eviction rates. Significant interaction in the relationship between eviction and all-cause mortality was observed by the proportion of Black and women residents. CONCLUSIONS: In this cross-sectional analysis, county-level eviction rates were significantly associated with all-cause mortality with the strongest effects observed among counties with the highest proportion of Black and women residents. State and federal protections from evictions may help to reduce the health consequences of housing instability and address disparities in health outcomes.


Asunto(s)
Vivienda , Pobreza , Humanos , Femenino , Estados Unidos/epidemiología , Estudios Transversales , Mortalidad
4.
Phys Chem Chem Phys ; 25(48): 32913-32921, 2023 Dec 13.
Artículo en Inglés | MEDLINE | ID: mdl-38018366

RESUMEN

A molecular level understanding of the property evolution in binary nanoalloy catalysts is crucial for designing novel electrocatalysts for ammonia synthesis. In this regard, designing core-shell catalyst structures has been a versatile approach to achieve the product selectivity. Herein, we investigated the activity evolution of Fe-based core-shell (M15@Fe50) (M = Co, Ni, or Cu) clusters for the nitrogen reduction reaction (NRR). Nitrogen reduction following the associative mechanistic pathway is significantly activated over the Cu15@Fe50 cluster. The d-band center from the electronic structure analysis is found to be upshifted, justifying the activity towards the NRR. The reduction reaction occurs via the surface restructuring of the catalyst, in which the *NH2 formation is found to be the lowest endergonic potential determining step compared to pristine Fe(110). Based on this, the high NRR activity of the Cu15@Fe50 cluster has been proposed, which, we envision, will provide useful insights into the position and compositional effects of core-shell structures for the discovery of efficient NRR electrocatalysts.

5.
Circulation ; 143(2): 135-144, 2021 01 12.
Artículo en Inglés | MEDLINE | ID: mdl-33200947

RESUMEN

BACKGROUND: Obesity may contribute to adverse outcomes in coronavirus disease 2019 (COVID-19). However, studies of large, broadly generalizable patient populations are lacking, and the effect of body mass index (BMI) on COVID-19 outcomes- particularly in younger adults-remains uncertain. METHODS: We analyzed data from patients hospitalized with COVID-19 at 88 US hospitals enrolled in the American Heart Association's COVID-19 Cardiovascular Disease Registry with data collection through July 22, 2020. BMI was stratified by World Health Organization obesity class, with normal weight prespecified as the reference group. RESULTS: Obesity, and, in particular, class III obesity, was overrepresented in the registry in comparison with the US population, with the largest differences among adults ≤50 years. Among 7606 patients, in-hospital death or mechanical ventilation occurred in 2109 (27.7%), in-hospital death in 1302 (17.1%), and mechanical ventilation in 1602 (21.1%). After multivariable adjustment, classes I to III obesity were associated with higher risks of in-hospital death or mechanical ventilation (odds ratio, 1.28 [95% CI, 1.09-1.51], 1.57 [1.29-1.91], 1.80 [1.47-2.20], respectively), and class III obesity was associated with a higher risk of in-hospital death (hazard ratio, 1.26 [95% CI, 1.00-1.58]). Overweight and class I to III obese individuals were at higher risk for mechanical ventilation (odds ratio, 1.28 [95% CI, 1.09-1.51], 1.54 [1.29-1.84], 1.88 [1.52-2.32], and 2.08 [1.68-2.58], respectively). Significant BMI by age interactions were seen for all primary end points (P-interaction<0.05 for each), such that the association of BMI with death or mechanical ventilation was strongest in adults ≤50 years, intermediate in adults 51 to 70 years, and weakest in adults >70 years. Severe obesity (BMI ≥40 kg/m2) was associated with an increased risk of in-hospital death only in those ≤50 years (hazard ratio, 1.36 [1.01-1.84]). In adjusted analyses, higher BMI was associated with dialysis initiation and with venous thromboembolism but not with major adverse cardiac events. CONCLUSIONS: Obese patients are more likely to be hospitalized with COVID-19, and are at higher risk of in-hospital death or mechanical ventilation, in particular, if young (age ≤50 years). Obese patients are also at higher risk for venous thromboembolism and dialysis. These observations support clear public health messaging and rigorous adherence to COVID-19 prevention strategies in all obese individuals regardless of age.


Asunto(s)
Índice de Masa Corporal , COVID-19 , Hospitalización , Obesidad , Sistema de Registros , SARS-CoV-2 , Factores de Edad , Anciano , American Heart Association , COVID-19/mortalidad , COVID-19/terapia , Femenino , Humanos , Masculino , Persona de Mediana Edad , Obesidad/clasificación , Obesidad/mortalidad , Obesidad/terapia , Estados Unidos/epidemiología
6.
Circulation ; 143(24): 2332-2342, 2021 06 15.
Artículo en Inglés | MEDLINE | ID: mdl-33200953

RESUMEN

BACKGROUND: The coronavirus disease 2019 (COVID-19) pandemic has exposed longstanding racial and ethnic inequities in health risks and outcomes in the United States. We aimed to identify racial and ethnic differences in presentation and outcomes for patients hospitalized with COVID-19. METHODS: The American Heart Association COVID-19 Cardiovascular Disease Registry is a retrospective observational registry capturing consecutive patients hospitalized with COVID-19. We present data on the first 7868 patients by race/ethnicity treated at 88 hospitals across the United States between January 17, 2020, and July 22, 2020. The primary outcome was in-hospital mortality. Secondary outcomes included major adverse cardiovascular events (death, myocardial infarction, stroke, heart failure) and COVID-19 cardiorespiratory ordinal severity score (worst to best: death, cardiac arrest, mechanical ventilation with mechanical circulatory support, mechanical ventilation with vasopressors/inotrope support, mechanical ventilation without hemodynamic support, and hospitalization alone. Multivariable logistic regression analyses were performed to assess the relationship between race/ethnicity and each outcome adjusting for differences in sociodemographic, clinical, and presentation features, and accounting for clustering by hospital. RESULTS: Among 7868 patients hospitalized with COVID-19, 33.0% were Hispanic, 25.5% were non-Hispanic Black, 6.3% were Asian, and 35.2% were non-Hispanic White. Hispanic and Black patients were younger than non-Hispanic White and Asian patients and were more likely to be uninsured. Black patients had the highest prevalence of obesity, hypertension, and diabetes. Black patients also had the highest rates of mechanical ventilation (23.2%) and renal replacement therapy (6.6%) but the lowest rates of remdesivir use (6.1%). Overall mortality was 18.4% with 53% of all deaths occurring in Black and Hispanic patients. The adjusted odds ratios for mortality were 0.93 (95% CI, 0.76-1.14) for Black patients, 0.90 (95% CI, 0.73-1.11) for Hispanic patients, and 1.31 (95% CI, 0.96-1.80) for Asian patients compared with non-Hispanic White patients. The median odds ratio across hospitals was 1.99 (95% CI, 1.74-2.48). Results were similar for major adverse cardiovascular events. Asian patients had the highest COVID-19 cardiorespiratory severity at presentation (adjusted odds ratio, 1.48 [95% CI, 1.16-1.90]). CONCLUSIONS: Although in-hospital mortality and major adverse cardiovascular events did not differ by race/ethnicity after adjustment, Black and Hispanic patients bore a greater burden of mortality and morbidity because of their disproportionate representation among COVID-19 hospitalizations.


Asunto(s)
COVID-19/patología , Disparidades en el Estado de Salud , Hospitalización/estadística & datos numéricos , Anciano , Anciano de 80 o más Años , American Heart Association , COVID-19/etnología , COVID-19/mortalidad , COVID-19/virología , Enfermedades Cardiovasculares/complicaciones , Enfermedades Cardiovasculares/patología , Comorbilidad , Femenino , Mortalidad Hospitalaria/etnología , Humanos , Modelos Logísticos , Masculino , Persona de Mediana Edad , Factores Raciales , Sistema de Registros , Estudios Retrospectivos , SARS-CoV-2/aislamiento & purificación , Índice de Severidad de la Enfermedad , Estados Unidos
7.
Int J Obes (Lond) ; 46(12): 2163-2167, 2022 12.
Artículo en Inglés | MEDLINE | ID: mdl-36008680

RESUMEN

Despite its cardiometabolic benefits, bariatric surgery has historically been underused in patients with obesity and diabetes, but contemporary data are lacking. Among 1,520,182 patients evaluated from 2013 to 2019 within a multicenter, longitudinal, US registry of outpatients with diabetes, we found that 462,033 (30%) met eligibility for bariatric surgery. After a median follow-up of 854 days, 6310/384,859 patients (1.6%) underwent primary bariatric surgery, with a slight increase over time (0.38% per year [2013] to 0.68% per year [2018]). Patients who underwent bariatric surgery were more likely to be female (63% vs. 56%), white (87% vs. 82%), have higher body mass indices (42.1 ± 6.9 vs. 40.6 ± 5.9 kg/m2), and depression (23% vs. 14%; p < 0.001 for all). Over a median (IQR) follow-up after surgery of 722 days (364-993), patients who underwent bariatric surgery had lost an average of 11.8 ± 18.5 kg (23% of excess body weight), 10.2% were on fewer glucose-lowering medications, and 8.4% were on fewer antihypertensives. Despite bariatric surgery being safer and more accessible over the past two decades, less than one in fifty eligible patients with diabetes receive this therapy.


Asunto(s)
Cirugía Bariátrica , Diabetes Mellitus Tipo 2 , Diabetes Mellitus , Obesidad Mórbida , Humanos , Femenino , Masculino , Pérdida de Peso , Cirugía Bariátrica/efectos adversos , Obesidad/complicaciones , Obesidad/epidemiología , Obesidad/cirugía , Sistema de Registros , Diabetes Mellitus Tipo 2/complicaciones , Diabetes Mellitus Tipo 2/epidemiología , Diabetes Mellitus Tipo 2/cirugía , Obesidad Mórbida/complicaciones , Obesidad Mórbida/epidemiología , Obesidad Mórbida/cirugía , Estudios Retrospectivos
8.
Syst Biol ; 70(1): 49-66, 2021 01 01.
Artículo en Inglés | MEDLINE | ID: mdl-32359157

RESUMEN

Molecular phylogenies have yielded strong support for many parts of the amphibian Tree of Life, but poor support for the resolution of deeper nodes, including relationships among families and orders. To clarify these relationships, we provide a phylogenomic perspective on amphibian relationships by developing a taxon-specific Anchored Hybrid Enrichment protocol targeting hundreds of conserved exons which are effective across the class. After obtaining data from 220 loci for 286 species (representing 94% of the families and 44% of the genera), we estimate a phylogeny for extant amphibians and identify gene tree-species tree conflict across the deepest branches of the amphibian phylogeny. We perform locus-by-locus genealogical interrogation of alternative topological hypotheses for amphibian monophyly, focusing on interordinal relationships. We find that phylogenetic signal deep in the amphibian phylogeny varies greatly across loci in a manner that is consistent with incomplete lineage sorting in the ancestral lineage of extant amphibians. Our results overwhelmingly support amphibian monophyly and a sister relationship between frogs and salamanders, consistent with the Batrachia hypothesis. Species tree analyses converge on a small set of topological hypotheses for the relationships among extant amphibian families. These results clarify several contentious portions of the amphibian Tree of Life, which in conjunction with a set of vetted fossil calibrations, support a surprisingly younger timescale for crown and ordinal amphibian diversification than previously reported. More broadly, our study provides insight into the sources, magnitudes, and heterogeneity of support across loci in phylogenomic data sets.[AIC; Amphibia; Batrachia; Phylogeny; gene tree-species tree discordance; genomics; information theory.].


Asunto(s)
Fósiles , Genómica , Animales , Anuros , Humanos , Filogenia
9.
Biol Conserv ; 255: 109003, 2021 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-35125501

RESUMEN

The COVID-19 pandemic has impacted every sphere of human society. The paradigm shift of focus to COVID-related research and management has significantly affected various scientific domains, including biodiversity conservation. We assessed the perceptions of early-career researchers working for biodiversity conservation across India, to understand the impacts of the ongoing pandemic on their research. We administered an online questionnaire survey to 565 respondents, who identified four key areas that are affected by the pandemic: (1) research, (2) conservation (3) education, and (4) communication and networking. Respondents (89.2%) perceived that their fieldwork, followed by travel for meetings and funding were the most affected due to COVID-19 outbreak and subsequent lockdown. Nonetheless, responses on the impact varied between different professional categories and were disproportionate. Our study highlights that majority of the respondents (80%) advocate for stakeholder-driven policies and management practices as the most effective strategy to promote biodiversity conservation, in the post-COVID-19 world. To this end, as a post-pandemic response, we propose holistic solutions such as optimising research funding and collaborations, and supporting and strengthening them by citizen science and big data analytics. Our findings and recommendations will also serve as a paradigm for post-COVID-19 biodiversity policy, advocacy and implementation of the post 2020 biodiversity action plan that supports eco civilization.

10.
Circulation ; 140(25): 2067-2075, 2019 12 17.
Artículo en Inglés | MEDLINE | ID: mdl-31760784

RESUMEN

BACKGROUND: Medication nonadherence is associated with worse outcomes in patients with atherosclerotic cardiovascular disease (ASCVD), a group who requires long-term therapy for secondary prevention. It is important to understand to what extent drug costs, which are potentially actionable factors, contribute to medication nonadherence. METHODS: In a nationally representative survey of US adults in the National Health Interview Survey (2013-2017), we identified individuals ≥18 years with a reported history of ASCVD. Participants were considered to have experienced cost-related nonadherence (CRN) if in the preceding 12 months they reported skipping doses to save money, taking less medication to save money, or delaying filling a prescription to save money. We used survey analysis to obtain national estimates. RESULTS: Of the 14 279 surveyed individuals with ASCVD, a weighted 12.6% (or 2.2 million [95% CI, 2.1-2.4]) experienced CRN, including 8.6% or 1.5 million missing doses, 8.8% or 1.6 million taking lower than prescribed doses, and 10.5% or 1.9 million intentionally delaying a medication fill to save costs. Age <65 years, female sex, low family income, lack of health insurance, and high comorbidity burden were independently associated with CRN, with >1 in 5 reporting CRN in these subgroups. Survey respondents with CRN compared with those without CRN had 10.8-fold higher odds of requesting low-cost medications and 8.9-fold higher odds of using alternative, nonprescription, therapies. CONCLUSIONS: One in 8 patients with ASCVD reports nonadherence to medications because of cost. The removal of financial barriers to accessing medications, particularly among vulnerable patient groups, may help improve adherence to essential therapy to reduce ASCVD morbidity and mortality.


Asunto(s)
Aterosclerosis/tratamiento farmacológico , Aterosclerosis/economía , Cumplimiento de la Medicación/psicología , Honorarios por Prescripción de Medicamentos/tendencias , Encuestas y Cuestionarios , Adolescente , Adulto , Anciano , Aterosclerosis/epidemiología , Femenino , Humanos , Masculino , Persona de Mediana Edad , Distribución Aleatoria , Estados Unidos/epidemiología , Adulto Joven
12.
Hosp Pharm ; 54(6): 358-364, 2019 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-31762482

RESUMEN

Purpose: This study evaluated the comparative effectiveness of different pharmacist visit types on reducing readmission rates. Method: A single-center, retrospective cohort study was conducted from January 2015 to July 2017. Patients were 18 years or older with an index heart failure (HF) exacerbation admission. Upon hospital discharge, patients were seen in clinic by a clinical pharmacy specialist (CPS) with collaborative practice agreement (CPA) (High Intensity Bundle), medication therapy management (MTM) pharmacist without CPA (Low Intensity Bundle), or no pharmacist (Standard of Care [SOC]). The primary outcome was 30-day all-cause readmission rate. Secondary outcomes included rate of 30-day HF readmissions and average number of days until readmission in those who were readmitted. Results: Totally, 98 patients were included in the final analysis (35 High Intensity Bundle, 28 Low Intensity Bundle, and 35 SOC). The primary outcome of all-cause readmissions was lower in both the pharmacist groups compared with SOC (CPS 8.6% [3/35] vs SOC 25.7% [9/35], P = 0.046 and MTM 7.1% [2/28] vs SOC 25.7% [9/35], P = 0.057). Incremental differences were seen between visit types for the secondary outcome of 30-day HF readmissions (CPS 2.9% vs MTM 7.1% vs SOC 17.1%, P = 0.039). The average number of days until readmission was longer in the CPS versus the MTM and SOC (26.7 days vs 12.5 days vs 14.1 days, respectively). Conclusion: Post-hospital discharge pharmacist visits were associated with lower 30-day all-cause readmission. In particular, clinic visits with a Higher Intensity Bundle may be more effective in reducing HF readmissions. These exploratory findings warrant further investigation.

13.
Am Heart J ; 204: 109-118, 2018 10.
Artículo en Inglés | MEDLINE | ID: mdl-30092412

RESUMEN

BACKGROUND: Cardiovascular disease is a leading economic and medical burden in the United States (US). As an important risk factor for cardiovascular disease, hypertension represents a critical point of intervention. Less is known about longitudinal effects of neighborhood deprivation on blood pressure outcomes, especially in light of new hypertension guidelines. METHODS: Longitudinal data from the Dallas Heart Study facilitated multilevel regression analysis of the relationship between neighborhood deprivation, blood pressure change, and incident hypertension over a 9-year period. Factor analysis explored neighborhood perception, which was controlled for in all analyses. Neighborhood deprivation was derived from US Census data and divided into tertiles for analysis. Hypertension status was compared using pre-2017 and 2017 hypertension guidelines. RESULTS: After adjusting for covariates, including moving status and residential self-selection, we observed significant associations between residing in the more deprived neighborhoods and 1) increasing blood pressure over time and 2) incident hypertension. In the fully adjusted model of continuous blood pressure change, significant relationships were seen for both medium (SBP: ß = 4.81, SE = 1.39, P = .0005; DBP: ß = 2.61, SE = 0.71, P = .0003) and high deprivation (SBP: ß = 7.64, SE = 1.55, P < .0001; DBP: ß = 4.64, SE = 0.78, P < .0001). In the fully adjusted model of incident hypertension, participants in areas of high deprivation had 1.69 higher odds of developing HTN (OR 1.69; 95% CI 1.02, 2.82), as defined by 2017 hypertension guidelines. Results varied based on definition of hypertension used (pre-2017 vs. 2017 guidelines). CONCLUSION: These findings highlight the potential impact of adverse neighborhood conditions on cardiometabolic outcomes, such as hypertension.


Asunto(s)
Estatus Económico , Hipertensión/epidemiología , Áreas de Pobreza , Características de la Residencia/estadística & datos numéricos , Adulto , Femenino , Humanos , Incidencia , Estudios Longitudinales , Masculino , Persona de Mediana Edad , Factores de Riesgo , Texas/epidemiología
14.
Circulation ; 133(14): e575-86, 2016 Apr 05.
Artículo en Inglés | MEDLINE | ID: mdl-26399661

RESUMEN

OBJECTIVE: To review the literature systematically to determine whether noninvasive or invasive risk stratification, such as with an electrophysiological study of patients with asymptomatic pre-excitation, reduces the risk of arrhythmic events and improves patient outcomes. METHODS: PubMed, EMBASE, and the Cochrane Central Register of Controlled Trials (all January 1, 1970, through August 31, 2014) were searched for randomized controlled trials and cohort studies examining noninvasive or invasive risk stratification in patients with asymptomatic pre-excitation. Studies were rejected for low-quality design or the lack of an outcome, population, intervention, or comparator of interest or if they were written in a language other than English. RESULTS: Of 778 citations found, 9 studies met all the eligibility criteria and were included in this paper. Of the 9 studies, 1 had a dual design-a randomized controlled trial of ablation versus no ablation in 76 patients and an uncontrolled prospective cohort of 148 additional patients-and 8 were uncontrolled prospective cohort studies (n=1594). In studies reporting a mean age, the range was 32 to 50 years, and in studies reporting a median age, the range was 19 to 36 years. The majority of patients were male (range, 50% to 74%), and <10% had structural heart disease. In the randomized controlled trial component of the dual-design study, the 5-year Kaplan-Meier estimates of the incidence of arrhythmic events were 7% among patients who underwent ablation and 77% among patients who did not undergo ablation (relative risk reduction: 0.08; 95% confidence interval: 0.02 to 0.33; P<0.001). In the observational cohorts of asymptomatic patients who did not undergo catheter ablation (n=883, with follow-up ranging from 8 to 96 months), regular supraventricular tachycardia or benign atrial fibrillation (shortest RR interval >250 ms) developed in 0% to 16%, malignant atrial fibrillation (shortest RR interval ≤250 ms) in 0% to 9%, and ventricular fibrillation in 0% to 2%, most of whom were children in the last case. CONCLUSIONS: The existing evidence suggests risk stratification with an electrophysiological study of patients with asymptomatic pre-excitation may be beneficial, along with consideration of accessory-pathway ablation in those deemed to be at high risk of future arrhythmias. Given the limitations of the existing data, well-designed and well-conducted studies are needed.


Asunto(s)
Arritmias Cardíacas/prevención & control , Electrocardiografía , Síndromes de Preexcitación/complicaciones , Fascículo Atrioventricular Accesorio/fisiopatología , Fascículo Atrioventricular Accesorio/cirugía , Adulto , Arritmias Cardíacas/epidemiología , Arritmias Cardíacas/etiología , Enfermedades Asintomáticas , Ablación por Catéter , Estudios de Seguimiento , Humanos , Estudios Observacionales como Asunto , Complicaciones Posoperatorias/epidemiología , Guías de Práctica Clínica como Asunto , Síndromes de Preexcitación/diagnóstico , Síndromes de Preexcitación/terapia , Estudios Prospectivos , Ensayos Clínicos Controlados Aleatorios como Asunto , Riesgo , Medición de Riesgo , Resultado del Tratamiento
15.
Diabetes Metab Res Rev ; 33(2)2017 02.
Artículo en Inglés | MEDLINE | ID: mdl-27455039

RESUMEN

BACKGROUND: Excess adipose tissue has been implicated in the pathogenesis of insulin resistance and atherosclerosis and is a key risk factor for blood pressure (BP) elevation. However, circulating levels of adiponectin, a protein produced by adipose tissue and widely implicated in the pathogenesis of insulin resistance and atherosclerosis, are inversely proportional to adiposity. The relationship between adiponectin and incident hypertension has not been determined in the general US population. METHODS: Normotensive participants (n = 1233) enrolled in the Dallas Heart Study, a multiethnic, probability-based population sample of Dallas County adults were followed for median of 7 years. Retroperitoneal, intraperitoneal, visceral, and subcutaneous adipose tissue were measured at baseline by magnetic resonance imaging. Liver fat content was measured by 1 H-magnetic resonance spectroscopy. Relative risk regression was used to determine the association of adiponectin with incident hypertension after adjustment for age, race, sex, BMI, smoking, diabetes, baseline systolic BP, total cholesterol, and regional fat depot. RESULTS: Of the 1233 study participants (median age 40 years, 40% black, and 56% women), 391 (32%) had developed hypertension over a median follow-up of 7 years. Adiponectin levels were associated with reduced risk of incident hypertension (RR 0.81, 95% CI [0.68-0.96]) in the fully adjusted model, which included liver fat. Similar results were observed after adjustment for subcutaneous or visceral fat depots when tested individually or simultaneously in the model. CONCLUSION: Our study suggested a protective role of adiponectin against incident hypertension independent of body fat distribution.


Asunto(s)
Adiponectina/metabolismo , Aterosclerosis/fisiopatología , Distribución de la Grasa Corporal/estadística & datos numéricos , Hipertensión/prevención & control , Obesidad/fisiopatología , Adiposidad , Adolescente , Adulto , Anciano , Presión Sanguínea , Estudios de Casos y Controles , Femenino , Estudios de Seguimiento , Humanos , Hipertensión/epidemiología , Hipertensión/metabolismo , Incidencia , Resistencia a la Insulina , Masculino , Persona de Mediana Edad , Pronóstico , Factores de Riesgo , Texas/epidemiología , Adulto Joven
16.
Am J Med Genet A ; 173(8): 2189-2200, 2017 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-28599087

RESUMEN

Achondroplasia is an autosomal dominant disorder, the most common genetic cause of short stature in humans. Reference curves for head circumference, weight, height, and BMI are needed in clinical practice but none exist for the Australian population. This study aimed to produce head circumference, height, weight, and BMI reference percentile curves for Australian children and adolescents with achondroplasia. Measurements of head circumference, height and weight taken at clinical visits were retrospectively extracted from the electronic medical record. Age was corrected for prematurity. Patients were excluded from head circumference analysis if they had significant neurosurgical complications and from the weight and BMI analysis when they had a clinical diagnosis of overweight. Measurements were available on 138 individuals (69 males and 69 females) taken between 1970 and 2015, with over 50% collected since 2005. A total of 3,352 data points were available. The LMS method was used to produce growth charts with estimated centiles (10, 25, 50, 75, and 90th) separately for males and females. For females birth weight was 3 kg (2.5-3.5 kg), birth length 48 cm (44-50 cm) and head circumference 37.5 cm (36-39 cm), adult height was 125 cm (116-132 cm), weight 42 kg (34-54 kg), and head circumference 58 cm (55.5-60.5 cm) all 50th centile (10-90th). For males birth weight was 3.5 kg (3-4 kg), length 49 cm (46-52 cm) and head circumference 38.5 cm (36-41 cm), adult height was 134 cm (125-141 cm), weight 41 kg (24.5-57 kg) and head circumference 61 cm (58-64 cm). The curves are similar to previously published reference data from the USA and have expected population wide variation from curves from an Argentinian population. Despite limitations of our curves for adolescents (12 years and older) due to data paucity, these Australian growth charts for children and adolescents with achondroplasia will be a useful reference in clinical practice.


Asunto(s)
Acondroplasia/fisiopatología , Antropometría , Peso al Nacer/fisiología , Estatura/fisiología , Acondroplasia/epidemiología , Acondroplasia/genética , Adolescente , Australia , Índice de Masa Corporal , Niño , Femenino , Gráficos de Crecimiento , Humanos , Recién Nacido , Recien Nacido Prematuro , Masculino
17.
Indian J Public Health ; 61(3): 208-210, 2017.
Artículo en Inglés | MEDLINE | ID: mdl-28928306

RESUMEN

Cardiometabolic health status of 356 women (age 25-65 years) from Tripuri tribal community of Tripura, a Northeastern state of India was evaluated. The height, weight, waist, hip circumference and blood pressure, blood sugar, total cholesterol, triglyceride; high-density lipoprotein cholesterol, low-density lipoprotein cholesterol, and very low-density lipoprotein cholesterol were recorded. Cardiometabolic risk was assessed according to the recent definition for Asian Indians. The overall prevalence of cardiometabolic risk was found to be 27.24%. Postmenopausal women showed a higher prevalence of risk than premenopausal women. Central obesity was the most prevalent risk component among all the subjects. The urban population with high income and higher education level with sedentary lifestyle were more prone to cardiometabolic risk. The study revealed that a substantial proportion of ethnic Tripuri women are having prevalence of different cardiometabolic risk factors. The fact needs to be taken into consideration while considering strategies to mitigate noncommunicable disease burden of the population.


Asunto(s)
Enfermedades Cardiovasculares/etiología , Enfermedades Cardiovasculares/metabolismo , Adulto , Anciano , Estudios Transversales , Femenino , Humanos , India , Lipoproteínas HDL/sangre , Modelos Logísticos , Persona de Mediana Edad , Obesidad/metabolismo , Prevalencia , Factores de Riesgo , Triglicéridos/sangre
18.
Stroke ; 47(7): 1720-6, 2016 07.
Artículo en Inglés | MEDLINE | ID: mdl-27283202

RESUMEN

BACKGROUND AND PURPOSE: Low cardiorespiratory fitness (CRF) is associated with an increased risk of stroke. However, the extent to which this association is explained by the development of stroke risk factors such as diabetes mellitus, hypertension, and atrial fibrillation is unknown. We evaluated the relationship between midlife CRF and risk of stroke after the age of 65 years, independent of the antecedent risk factor burden. METHODS: Linking participant data from the Cooper Center Longitudinal Study with Medicare claims files, we studied 19 815 individuals who survived to receive Medicare coverage from 1999 to 2009. CRF estimated at baseline by Balke treadmill time was analyzed as a continuous variable (in metabolic equivalents) and according to age- and sex-specific quintiles (Q1=low CRF). Associations between midlife CRF and stroke hospitalization after the age of 65 years were assessed by applying a proportional hazards recurrent events model to the failure time data with hypertension, diabetes mellitus, and atrial fibrillation as time-dependent covariates. RESULTS: After 129 436 person-years of Medicare follow-up, we observed 808 stroke hospitalizations. After adjustment for baseline risk factors, higher midlife CRF was associated with a lower risk of stroke hospitalization (hazard ratio [HR], 0.61; 95% confidence interval [CI], 0.49-0.76; quintiles 4-5 versus 1]. This association remained unchanged after additional adjustment for burden of Medicare-identified stroke risk factors (hypertension, diabetes mellitus, and atrial fibrillation; HR, 0.63; 95% CI, 0.51-0.79; quintiles 4-5 versus 1). CONCLUSIONS: There is a strong, inverse association between midlife CRF and stroke risk in later life independent of baseline and antecedent burden of risk factors, such as hypertension, diabetes mellitus, and atrial fibrillation.


Asunto(s)
Capacidad Cardiovascular/fisiología , Aptitud Física/fisiología , Accidente Cerebrovascular/etiología , Anciano , Fibrilación Atrial/complicaciones , Fibrilación Atrial/fisiopatología , Diabetes Mellitus/fisiopatología , Prueba de Esfuerzo , Femenino , Humanos , Hipertensión/complicaciones , Hipertensión/fisiopatología , Estudios Longitudinales , Masculino , Persona de Mediana Edad , Factores de Riesgo , Accidente Cerebrovascular/fisiopatología
19.
Circulation ; 139(10): e56-e528, 2019 03 05.
Artículo en Inglés | MEDLINE | ID: mdl-30700139
20.
Am Heart J ; 169(2): 290-297.e1, 2015 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-25641539

RESUMEN

AIMS: Low mid-life fitness is associated with higher risk for heart failure (HF). However, it is unclear to what extent this HF risk is modifiable and mediated by the burden of cardiac and noncardiac comorbidities. We studied the effect of cardiac and noncardiac comorbidities on the association of mid-life fitness and fitness change with HF risk. METHODS: Linking individual subject data from the Cooper Center Longitudinal Study (CCLS) with Medicare claims files, we studied 19,485 subjects (21.2% women) who survived to receive Medicare coverage from 1999 to 2009. Fitness estimated by Balke treadmill time at mean age of 49 years was analyzed as a continuous variable (in metabolic equivalents [METs]) and according to age- and sex-specific quintiles. Associations of mid-life fitness and fitness change with HF hospitalization after age of 65 years were assessed by applying a proportional hazards recurrent events model to the failure time data with each comorbidity entered as time-dependent covariates. RESULTS: After 127,110 person years of Medicare follow-up, we observed 1,038 HF hospitalizations. Higher mid-life fitness was associated with a lower risk for HF hospitalization (hazard ratio [HR] 0.82 [0.76-0.87] per MET) after adjustment for traditional risk factors. This remained unchanged after further adjustment for the burden of Medicare-identified cardiac and noncardiac comorbidities (HR 0.83 [0.78-0.89]). Each 1 MET improvement in mid-life fitness was associated with a 17% lower risk for HF hospitalization in later life (HR 0.83 [0.74-0.93] per MET). CONCLUSIONS: Mid-life fitness is an independent and modifiable risk factor for HF hospitalization at a later age.


Asunto(s)
Insuficiencia Cardíaca , Aptitud Física/fisiología , Adulto , Anciano , Comorbilidad , Modificador del Efecto Epidemiológico , Prueba de Esfuerzo/métodos , Insuficiencia Cardíaca/diagnóstico , Insuficiencia Cardíaca/epidemiología , Insuficiencia Cardíaca/fisiopatología , Hospitalización/estadística & datos numéricos , Humanos , Estudios Longitudinales , Masculino , Medicare/estadística & datos numéricos , Persona de Mediana Edad , Pronóstico , Medición de Riesgo/métodos , Factores de Riesgo , Estados Unidos/epidemiología
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