Right Ventricular Functional Improvement after Pulmonary Rehabilitation Program in Patients with COPD Determined by Speckle Tracking Echocardiography / Melhora da Função Ventricular Direita após Programa de Reabilitação Pulmonar em Pacientes com DPOC Avaliada por Ecocardiografia Speckle Tracking

Abstract Background: Although right ventricular (RV) dysfunction in pulmonary diseases has been associated with increased morbidity, tools for RV dysfunction identification are not well defined. Objective: The aim of this study was to evaluate the magnitude of RV dysfunction by means of speckle tracking echocardiography (STE) in patients with chronic obstructive pulmonary disease (COPD) and to investigate whether STE could be used as an index of RV improvement after a pulmonary rehabilitation (PR) program. Methods: Forty-six patients with COPD undergoing PR program and 32 age-sex matched healthy subjects were enrolled. RV function was evaluated at admission and after PR program by conventional two-dimensional echocardiography (2DE) and STE. In addition, exercise tolerance of subjects was evaluated using the six-minute walk test (6MWT). Results: COPD patients had worse RV function according to STE and 2DE as well. STE was more sensitive than conventional 2DE in determining RV improvement after PR program - RV global longitudinal strain (LS): 20.4 ± 2.4% vs. 21.9 ± 2.9% p < 0.001 and RV free wall LS: 18.1 ± 3.4% vs. 22.9 ± 3.7%, p < 0.001). RV free wall LS was directly related to distance walked at baseline 6MWT (r = 0.58, p < 0.001) and to the change in the 6MWT distance (6MWTD ∆) (r = 0.41, p = 0.04). Conclusions: We conclude that STE might be as effective as 2DE for evaluation of global and regional RV functions. STE may become an important tool for assessment and follow-up of COPD patients undergoing PR program to determine the relationship between RV function and exercise tolerance.

Resumo Fundamento: Embora a disfunção do ventrículo direito (VD) nas doenças pulmonares tenha sido associada ao aumento da morbidade, as ferramentas para a identificação da disfunção do VD não estão bem definidas. Objetivo: O objetivo deste estudo foi avaliar a disfunção do VD por ecocardiografia speckle tracking (STE) em pacientes com doença pulmonar obstrutiva crônica (DPOC), e se a STE pode ser usada como indicador de melhora da função ventricular direita após um programa de reabilitação pulmonar (RP). Métodos: Quarenta e seis pacientes com DPOC submetidos ao programa de RP e 32 controles sadios pareados por sexo e idade foram incluídos no estudo. A função do VD foi avaliada na admissão e após o programa de RP por ecocardiografia bidimensional convencional e por STE. Além disso, a tolerância ao exercício foi avaliada pelo teste de caminhada de seis minutos (TC6M). Resultados: Pacientes com DPOC apresentaram pior função do VD segundo STE e ecocardiografia bidimensional convencional. Em comparação ao método convencional, a STE mostrou maior sensibilidade em determinar melhora da função ventricular direita após o programa de RP - strain longitudinal (SL) global do VD: 20,4 ± 2,4% vs. 21,9 ± 2,9% p < 0,001; SL da parede livre do VD: 18,1 ± 3,4% vs. 22,9 ± 3,7%, p < 0,001. O SL da parede livre do VD relacionou-se diretamente com a distância percorrida no TC6M basal (r = 0,58, p < 0,001) e com a variação no TC6M ∆ (TC6M) (r = 0,41, p = 0,04). Conclusões: Concluímos que a STE pode ser tão eficaz como a ecocardiografia bidimensional convencional na avaliação das funções globais e regionais do VD. Ainda, a STE pode se tornar uma importante ferramenta de avaliação e acompanhamento de pacientes com DPOC submetidos à RP para determinar a relação entre função ventricular direita e tolerância ao exercício.

Right Ventricular Functional Improvement after Pulmonary Rehabilitation Program in Patients with COPD Determined by Speckle Tracking Echocardiography.

BACKGROUND: Although right ventricular (RV) dysfunction in pulmonary diseases has been associated with increased morbidity, tools for RV dysfunction identification are not well defined. OBJECTIVE: The aim of this study was to evaluate the magnitude of RV dysfunction by means of speckle tracking echocardiography (STE) in patients with chronic obstructive pulmonary disease (COPD) and to investigate whether STE could be used as an index of RV improvement after a pulmonary rehabilitation (PR) program. METHODS: Forty-six patients with COPD undergoing PR program and 32 age-sex matched healthy subjects were enrolled. RV function was evaluated at admission and after PR program by conventional two-dimensional echocardiography (2DE) and STE. In addition, exercise tolerance of subjects was evaluated using the six-minute walk test (6MWT). RESULTS: COPD patients had worse RV function according to STE and 2DE as well. STE was more sensitive than conventional 2DE in determining RV improvement after PR program - RV global longitudinal strain (LS): 20.4 ± 2.4% vs. 21.9 ± 2.9% p < 0.001 and RV free wall LS: 18.1 ± 3.4% vs. 22.9 ± 3.7%, p < 0.001). RV free wall LS was directly related to distance walked at baseline 6MWT (r = 0.58, p < 0.001) and to the change in the 6MWT distance (6MWTD ∆) (r = 0.41, p = 0.04). CONCLUSIONS: We conclude that STE might be as effective as 2DE for evaluation of global and regional RV functions. STE may become an important tool for assessment and follow-up of COPD patients undergoing PR program to determine the relationship between RV function and exercise tolerance.

Neutrophil-to-Lymphocyte Ratio and Platelet-to-Lymphocyte Ratio are Predictors of Heart Failure / Relações Neutrófilo-Linfócito e Plaqueta-Linfócito Como Preditores de Insuficiência Cardíaca

Abstract Background: Neutrophil-to-lymphocyte ratio (NLR) and platelet-to-lymphocyte ratio (PLR) are inflammatory markers used as prognostic factors in various diseases. The aims of this study were to compare the PLR and the NLR of heart failure (HF) patients with those of age-sex matched controls, to evaluate the predictive value of those markers in detecting HF, and to demonstrate the effect of NLR and PLR on mortality in HF patients during follow-up. Methods: This study included 56 HF patients and 40 controls without HF. All subjects underwent transthoracic echocardiography to evaluate cardiac functions. The NLR and the PLR were calculated as the ratio of neutrophil count to lymphocyte count and as the ratio of platelet count to lymphocyte count, respectively. All HF patients were followed after their discharge from the hospital to evaluate mortality, cerebrovascular events, and re-hospitalization. Results: The NLR and the PLR of HF patients were significantly higher compared to those of the controls (p < 0.01). There was an inverse correlation between the NLR and the left ventricular ejection fraction of the study population (r: -0.409, p < 0.001). The best cut-off value of NLR to predict HF was 3.0, with 86.3% sensitivity and 77.5% specificity, and the best cut-off value of PLR to predict HF was 137.3, with 70% sensitivity and 60% specificity. Only NLR was an independent predictor of mortality in HF patients. A cut-off value of 5.1 for NLR can predict death in HF patients with 75% sensitivity and 62% specificity during a 12.8-month follow-up period on average. Conclusion: NLR and PLR were higher in HF patients than in age-sex matched controls. However, NLR and PLR were not sufficient to establish a diagnosis of HF. NLR can be used to predict mortality during the follow-up of HF patients.

Resumo Fundamentos: A obesidade mórbida está diretamente relacionada à deterioração da capacidade cardiorrespiratória, incluindo alterações na modulação autonômica cardiovascular. Objetivo: Este estudo teve por objetivo avaliar a função autonômica cardiovascular de obesos mórbidos. Métodos: Estudo transversal, incluindo dois grupos, Grupo I, composto por 50 obesos mórbidos, e Grupo II, por 30 indivíduos não obesos. A função autonômica foi avaliada pela variabilidade da frequência cardíaca no domínio do tempo [desvio padrão de todos os intervalos R-R normais (SDNN); desvio-padrão de todos os intervalos R-R normais (SDNN); raiz quadrada das médias quadráticas das diferenças dos intervalos R-R sucessivos (RMSSD); e o percentual de diferenças de intervalo intervalos R-R sucessivos maior que 50 milissegundos (pNN50)] em comparação ao adjacente, e no domínio da frequência (HF, do inglês, “high frequency”, e LF, do inglês, “low frequency”: integração da função da densidade espectral de potência para as bandas de alta e baixa frequência, respectivamente). Os grupos foram comparados pelo teste t de Student, considerando-se um nível de significância de 5%. Resultados: Quando comparados aos controles, os indivíduos obesos apresentaram valores menores de SDNN (40,0 ± 18,0 ms vs. 70,0 ± 27,8 ms; p = 0,0004), RMSSD (23,7 ± 13,0 ms vs. 40,3 ± 22,4 ms; p = 0,0030), pNN50 (14,8 ± 10,4 % vs. 25,9 ± 7,2%; p = 0,0061) e HF (30,0 ± 17,5 Hz vs. 51,7 ± 25,5 Hz; p = 0,0023). A relação LF/HF média foi maior no Grupo I (5,0 ± 2,8 vs. 1,0 ± 0,9; p = 0,0189), refletindo alteração no equilíbrio simpato-vagal. Não houve diferença estatística entre os grupos I e II com relação ao índice LF (50,1 ± 30,2 Hz vs. 40,9 ± 23,9 Hz; p = 0,9013). Conclusão: obesos mórbidos apresentam aumento de atividade simpática e redução da atividade parassimpática, caracterizando uma disfunção autonômica cardiovascular.

Neutrophil-to-Lymphocyte Ratio and Platelet-to-Lymphocyte Ratio are Predictors of Heart Failure.

BACKGROUND: Neutrophil-to-lymphocyte ratio (NLR) and platelet-to-lymphocyte ratio (PLR) are inflammatory markers used as prognostic factors in various diseases. The aims of this study were to compare the PLR and the NLR of heart failure (HF) patients with those of age-sex matched controls, to evaluate the predictive value of those markers in detecting HF, and to demonstrate the effect of NLR and PLR on mortality in HF patients during follow-up. METHODS: This study included 56 HF patients and 40 controls without HF. All subjects underwent transthoracic echocardiography to evaluate cardiac functions. The NLR and the PLR were calculated as the ratio of neutrophil count to lymphocyte count and as the ratio of platelet count to lymphocyte count, respectively. All HF patients were followed after their discharge from the hospital to evaluate mortality, cerebrovascular events, and re-hospitalization. RESULTS: The NLR and the PLR of HF patients were significantly higher compared to those of the controls (p < 0.01). There was an inverse correlation between the NLR and the left ventricular ejection fraction of the study population (r: -0.409, p < 0.001). The best cut-off value of NLR to predict HF was 3.0, with 86.3% sensitivity and 77.5% specificity, and the best cut-off value of PLR to predict HF was 137.3, with 70% sensitivity and 60% specificity. Only NLR was an independent predictor of mortality in HF patients. A cut-off value of 5.1 for NLR can predict death in HF patients with 75% sensitivity and 62% specificity during a 12.8-month follow-up period on average. CONCLUSION: NLR and PLR were higher in HF patients than in age-sex matched controls. However, NLR and PLR were not sufficient to establish a diagnosis of HF. NLR can be used to predict mortality during the follow-up of HF patients.