Your browser doesn't support javascript.
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 278
Filtrar
3.
Arq Bras Cardiol ; 2019 Nov 14.
Artigo em Inglês, Português | MEDLINE | ID: mdl-31751441

RESUMO

The recent advances at hardware level and the increasing requirement of personalization of care associated with the urgent needs of value creation for the patients has helped Artificial Intelligence (AI) to promote a significant paradigm shift in the most diverse areas of medical knowledge, particularly in Cardiology, for its ability to support decision-making and improve diagnostic and prognostic performance. In this context, the present work does a non-systematic review of the main papers published on AI in Cardiology, focusing on its main applications, potential impacts and challenges.

11.
Arq Bras Cardiol ; 112(6): 784-790, 2019 Jul 15.
Artigo em Inglês, Português | MEDLINE | ID: mdl-31314831

RESUMO

In 2016, the European Society of Cardiology (ESC) recognized heart failure (HF) with ejection fraction between 40 and 49% as a new HF phenotype, HF with mid-range ejection fraction (HFmrEF), with the main purpose of encouraging studies on this new category. In 2018, the Brazilian Society of Cardiology adhered to this classification and introduced HFmrEF in Brazil. This paper presents a narrative review of what the literature has described about HFmrEF. The prevalence of patients with HFmrEF ranged from 13 to 24% of patients with HF. Analyzing the clinical characteristics, HFmrEF shows intermediate characteristics or is either similar to HF with preserved ejection fraction (HFpEF) or to HF with reduced fraction (HFrEF). Regarding the prognosis, HFmrEF's all-cause mortality is similar to HFpEF's and lower than HFrEF's. Studies that analyzed cardiac mortality concluded that there was no significant difference between HFmrEF and HFrEF, both of which were lower than HFpEF. Despite the significant increase of publications on HFmrEF, there is a great scarcity of prospective studies and clinical trials that allow delineating specific therapies for this new phenotype. To better treat HFmrEF patients, it is fundamental that cardiologists and internists understand the differences and similarities of this new phenotype.

12.
Arq Bras Cardiol ; 112(5): 649-705, 2019 Jun 06.
Artigo em Inglês, Português | MEDLINE | ID: mdl-31188969
13.
Arq. bras. cardiol ; 112(6): 784-790, Jun. 2019. graf
Artigo em Inglês | LILACS-Express | ID: biblio-1011208

RESUMO

Abstract In 2016, the European Society of Cardiology (ESC) recognized heart failure (HF) with ejection fraction between 40 and 49% as a new HF phenotype, HF with mid-range ejection fraction (HFmrEF), with the main purpose of encouraging studies on this new category. In 2018, the Brazilian Society of Cardiology adhered to this classification and introduced HFmrEF in Brazil. This paper presents a narrative review of what the literature has described about HFmrEF. The prevalence of patients with HFmrEF ranged from 13 to 24% of patients with HF. Analyzing the clinical characteristics, HFmrEF shows intermediate characteristics or is either similar to HF with preserved ejection fraction (HFpEF) or to HF with reduced fraction (HFrEF). Regarding the prognosis, HFmrEF's all-cause mortality is similar to HFpEF's and lower than HFrEF's. Studies that analyzed cardiac mortality concluded that there was no significant difference between HFmrEF and HFrEF, both of which were lower than HFpEF. Despite the significant increase of publications on HFmrEF, there is a great scarcity of prospective studies and clinical trials that allow delineating specific therapies for this new phenotype. To better treat HFmrEF patients, it is fundamental that cardiologists and internists understand the differences and similarities of this new phenotype.


Resumo Em 2016, a Sociedade Europeia de Cardiologia (ESC) reconheceu a insuficiência cardíaca (IC) com fração de ejeção do ventrículo esquerdo entre 40% e 49% como um novo fenótipo de IC, a IC com fração de ejeção intermediária (ICFEI), tendo como principal intuito, incentivar estudos sobre essa nova categoria. Em 2018, a Sociedade Brasileira de Cardiologia aderiu a essa classificação e introduziu a ICFEI no Brasil. O presente trabalho traz uma revisão narrativa sobre o que a literatura descreve até o momento sobre ICFEI. A prevalência de pacientes com ICFEI variou de 13-24% dos pacientes com IC. Quando avaliadas as características clínicas, a ICFEI apresenta um caráter intermediário ou se assemelha algumas vezes com a IC de fração de ejeção preservada (ICFEP) e outras com a IC de fração reduzida (ICFER). Quanto ao prognóstico, a ICFEI apresenta mortalidade por todas as causas semelhante a ICFEP e menor que a ICFER. Os estudos que analisaram a mortalidade por causa cardíaca concluíram que não houve diferença significativa entre ICFEI e ICFER, sendo ambas menores que a ICFEP. Apesar do considerável aumento de publicações sobre a ICFEI, ainda existe uma grande carência de estudos prospectivos e ensaios clínicos que possibilitem delinear terapias específicas para esse novo fenótipo. O conhecimento das particularidades da ICFEI por cardiologistas e internistas é fundamental para o melhor manejo desses pacientes.

14.
Arq. bras. cardiol ; 112(5): 649-705, May 2019. gráfico, tabela
Artigo em Inglês | Sec. Est. Saúde SP, SESSP-IDPCPROD, Sec. Est. Saúde SP | ID: biblio-1022925

RESUMO

Development: The Department of Geriatric Cardiology of the Brazilian Society of Cardiology (Departamento de Cardiogeriatria da Sociedade Brasileira da Cardiologia) and the Brazilian Geriatrics and Gerontology Society (Sociedade Brasileira de Geriatria e Gerontologia). (AU)


Assuntos
Humanos , Geriatria
15.
Arq. bras. cardiol ; 112(5): 501-508, May 2019. tab, graf
Artigo em Inglês | LILACS-Express | ID: biblio-1011187

RESUMO

Abstract Background: Radiofrequency catheter ablation (RFCA) is a standard procedure for patients with atrial fibrillation (AF) not responsive to previous treatments, that has been increasingly considered as a first-line therapy. In this context, perioperative screening for risk factors has become important. A previous study showed that a high left atrial (LA) pressure is associated with AF recurrence after ablation, which may be secondary to a stiff left atrium. Objective: To investigate, through a systematic review and meta-analysis, if LA stiffness could be a predictor of AF recurrence after RFCA, and to discuss its clinical use. Methods: The meta-analysis followed the MOOSE recommendations. The search was performed in MEDLINE and Cochrane Central Register of Controlled Trials databases, until March 2018. Two authors performed screening, data extraction and quality assessment of the studies. Results: All studies were graded with good quality. A funnel plot was constructed, which did not show any publication bias. Four prospective observational studies were included in the systematic review and 3 of them in the meta-analysis. Statistical significance was defined at p value < 0.05. LA stiffness was a strong independent predictor of AF recurrence after RFCA (HR = 3.55, 95% CI 1.75-4.73, p = 0.0002). Conclusion: A non-invasive assessment of LA stiffness prior to ablation can be used as a potential screening factor to select or to closely follow patients with higher risks of AF recurrence and development of the stiff LA syndrome.


Resumo Fundamento: A ablação por cateter de radiofrequência (ACRF) é um procedimento padrão para pacientes com fibrilação atrial (FA) não responsivos a tratamentos prévios, que tem sido cada vez mais considerada como terapia de primeira linha. Nesse contexto, o screening para fatores de risco perioperatório tornou-se importante. Um estudo prévio mostrou que uma pressão do átrio esquerdo (AE) elevada está associada a recorrência de FA após a ablação, podendo ser secundária a um AE rígido. Objetivo: Investigar, por meio de revisão sistemática e metanálise, se a rigidez do AE é um preditor de recorrência de FA após ACRF, e discutir seu uso na prática clínica. Métodos: A metanálise foi realizada seguindo-se as recomendações do MOOSE. A busca foi realizada nas bases de dados MEDLINE e Cochrane Central Register of Controlled Trials, até março de 2018. Dois autores realizaram triagem, extração de dados e avaliação da qualidade dos estudos. Resultados: Todos os estudos obtiveram boa qualidade. Um gráfico de funil foi construído, não identificando viés de publicação. Quatro estudos prospectivos observacionais foram incluídos na revisão sistemática e 3 deles na metanálise. Foi adotado o nível de significância estatística de p < 0,05. Rigidez do AE foi um forte preditor independente da recorrência de FA após ACRF (HR = 3,55, IC 95% 1,75-4,73, p = 0,0002). Conclusão: A avaliação não invasiva da rigidez do AE antes da ablação pode ser utilizada como um potencial fator de rastreamento para a seleção ou acompanhamento de pacientes com maiores riscos de recorrência de FA e desenvolvimento da síndrome do AE rígido.

16.
Arq Bras Cardiol ; 112(5): 501-508, 2019 May.
Artigo em Inglês, Português | MEDLINE | ID: mdl-30843918

RESUMO

BACKGROUND: Radiofrequency catheter ablation (RFCA) is a standard procedure for patients with atrial fibrillation (AF) not responsive to previous treatments, that has been increasingly considered as a first-line therapy. In this context, perioperative screening for risk factors has become important. A previous study showed that a high left atrial (LA) pressure is associated with AF recurrence after ablation, which may be secondary to a stiff left atrium. OBJECTIVE: To investigate, through a systematic review and meta-analysis, if LA stiffness could be a predictor of AF recurrence after RFCA, and to discuss its clinical use. METHODS: The meta-analysis followed the MOOSE recommendations. The search was performed in MEDLINE and Cochrane Central Register of Controlled Trials databases, until March 2018. Two authors performed screening, data extraction and quality assessment of the studies. RESULTS: All studies were graded with good quality. A funnel plot was constructed, which did not show any publication bias. Four prospective observational studies were included in the systematic review and 3 of them in the meta-analysis. Statistical significance was defined at p value < 0.05. LA stiffness was a strong independent predictor of AF recurrence after RFCA (HR = 3.55, 95% CI 1.75-4.73, p = 0.0002). CONCLUSION: A non-invasive assessment of LA stiffness prior to ablation can be used as a potential screening factor to select or to closely follow patients with higher risks of AF recurrence and development of the stiff LA syndrome.

17.
Arq Bras Cardiol ; 111(3): 436-539, 2018 Sep.
Artigo em Português | MEDLINE | ID: mdl-30379264
18.
Int. j. cardiovasc. sci. (Impr.) ; 31(6): 652-661, nov.- dez. 2018. tab, ilus
Artigo em Inglês | LILACS | ID: biblio-979988

RESUMO

Heart failure with preserved ejection fraction (HFPEF) has become the main phenotypic model of heart failure (HF) in community and referral patients in Brazil and in the world. Despite advances in the development of new drugs for HF treatment, there has been no significant improvement in mortality of this condition. According to many studies, this can be explained by the heterogeneous nature of HF physiopathology, whose basic mechanisms may result in different clinical presentations, culminating in the emerging of different phenogroups in this syndrome. In this context, phenotype mapping of HFPEF has emerged as a possible solution, since it enables the development of clinical trials that establish specific therapeutic strategies for each phenotypic profile. New technologies in the field of artificial intelligence have enabled the assessment of a large volume of data and infer intrinsic patterns and different outcomes. Thereby, it is possible to obtain mutually exclusive categories of HFPEF, with a phenotype mapping of the syndrome and grouping of patients according to their phenotypic features. Besides, other diseases can have the same clinical phenotype but different pathophysiological basis, the so called "phenocopies". These tools enable the analysis and categorization of the wide spectrum of heart failure, contributing to solve the dilemmas of the treatment of this syndrome


Assuntos
Humanos , Masculino , Feminino , Fenótipo , Volume Sistólico , Aprendizado de Máquina , Insuficiência Cardíaca/fisiopatologia , Fibrilação Atrial , Terapêutica/métodos , Inteligência Artificial , Fatores de Risco , Doença Pulmonar Obstrutiva Crônica , Diabetes Mellitus , Insuficiência Renal Crônica , Obesidade
19.
Arq Bras Cardiol ; 110(6): 577-584, 2018 Jun.
Artigo em Inglês, Português | MEDLINE | ID: mdl-30226917

RESUMO

Pulmonary congestion is an important clinical finding in patients with heart failure (HF). Physical examination and chest X-ray have limited accuracy in detecting congestion. Pulmonary ultrasound (PU) has been incorporated into clinical practice in the evaluation of pulmonary congestion. This paper aimed to perform a systematic review of the use of PU in patients with HF, in different scenarios. A search was performed in the MEDLINE and LILACS databases in February 2017 involving articles published between 2006 and 2016. We found 26 articles in the present review, 11 of which in the emergency setting and 7 in the outpatient setting, with diagnostic and prognosis defined value and poorly studied therapeutic value. PU increased accuracy by 90% as compared to physical examination and chest X-ray for the diagnosis of congestion, being more sensitive and precocious. The skill of the PU performer did not interfere with diagnostic accuracy. The presence of B-lines ≥ 15 correlated with high BNP values (≥ 500) and E/e' ratio ≥ 15, with prognostic impact in IC patients at hospital discharge and those followed up on an outpatient basis. In conclusion, when assessing pulmonary congestion in HF, PU has an incremental value in the diagnostic and prognostic approach in all scenarios studied.

20.
Int. j. cardiovasc. sci. (Impr.) ; 31(4)jul.-ago. 2018. tab
Artigo em Português | LILACS | ID: biblio-910643

RESUMO

A depressão é uma condição clínica sindrômica subdiagnosticada em pacientes com insuficiência cardíaca. Uma variedade de instrumentos é atualmente aplicada no rastreamento da depressão. Determinar a prevalência da depressão e a concordância entre os métodos de rastreamento para depressão em pacientes com insuficiência cardíaca. Estudo transversal realizado entre março de 2015 e janeiro de 2017 com 76 pacientes ambulatoriais acompanhados em uma clínica especializada de insuficiência cardíaca. A depressão foi rastreada pela Escala de Avaliação de Depressão de Hamilton (HAM-D), pelo Inventário de Depressão de Beck-II (BDI-II) e pelo Patient Health Questionnaire-9 (PHQ-9). A concordância entre os três instrumentos foi analisada pelo coeficiente kappa de Fleiss (kF), coeficiente alfa de Krippendorff (Ck) e coeficiente alfa de Cronbach. Foram calculadas a acurácia, sensibilidade, especificidade e as taxas de resultados falso-positivos e falso-negativos dos instrumentos HAM-D e PHQ-9, considerando o instrumento BDI-II como padrão-ouro no diagnóstico da depressão. As prevalências de depressão foram de 72,4% (n = 55) pela escala HAM-D, 67,1% (n = 51) pela escala BDI-II e 40,8% (n = 31) pelo PHQ-9. A prevalência de depressão pelos três instrumentos simultaneamente foi de 28,9% (n = 22) e a concordância diagnóstica entre os três instrumentos (sobre a presença ou ausência de depressão) foi de 47,4% (n = 36). A análise revelou uma concordância superficial (kF = Ck = 0,27) e consistência moderada (↓C = 0,602, significativamente não nulo, p = 0,000). As variáveis sociodemográficas e clínicas não constituíram fatores de riscos para a depressão na amostra avaliada. Os métodos de rastreamento analisados apresentaram concordância e foram úteis na detecção da depressão entre pacientes ambulatoriais com insuficiência cardíaca


Depression is a syndromic clinical condition underdiagnosed in patients with heart failure. Several instruments are currently applied to screen for depression. To determine the prevalence of depression and the agreement among screening methods for depression in patients with heart failure. Cross-sectional study conducted between March 2015 and January 2017 including 76 outpatients following up at a clinic specialized in heart failure. Depression was screened with the Hamilton Depression Rating Scale (HAM-D), Beck Depression Inventory-II (BDI-II), and Patient Health Questionnaire-9 (PHQ-9). The agreement among the three instruments was analyzed with Fleiss' kappa coefficient (kF), Krippendorff's alpha coefficient (Ck) and Cronbach's alpha coefficient. The accuracy, sensitivity, and specificity, as well as false-positive and false-negative results of the HAM-D and PHQ-9 were calculated considering the BDI-II as the gold-standard instrument in the diagnosis of depression. The prevalence rates of depression were 72.4% (n = 55) with the HAM-D, 67.1% (n = 51) with the BDI-II, and 40.8% (n = 31) with the PHQ-9 scales. The prevalence of depression simultaneously identified by all three instruments was 28.9% (n = 22) and the diagnostic agreement (presence or absence of depression) was 47.4% (n = 36). The analysis revealed a superficial agreement (kF = Ck = 0.27) and moderate consistency ((↓C = 0.602, significantly not null, p = 0.000). Sociodemographic and clinical variables were not risk factors for depression in the evaluated sample. The screening methods analyzed showed agreement and were useful in detecting depression among outpatients with heart failure


Assuntos
Humanos , Masculino , Feminino , Pessoa de Meia-Idade , Depressão/diagnóstico , Depressão/epidemiologia , Insuficiência Cardíaca , Questionário de Saúde do Paciente , Prevalência , Estudos Transversais , Diabetes Mellitus , Dislipidemias , Registros Médicos , Pacientes Ambulatoriais , Sensibilidade e Especificidade , Análise Estatística , Estatística como Assunto/métodos
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA