Diagnostic and Prognostic Role of Liver Elastography in Heart Failure

Abstract Background: Hepatic congestion is a frequent finding in patients with heart failure (HF). Physical examination has limitations in quantifying systemic congestion and requires correlation with echocardiographic and laboratory data (usually B-type natriuretic peptide, BNP, or N-terminal pro-B type natriuretic peptide, NT-proBNP). Hepatic elastography evaluates liver stiffness using a transducer that transmits low-frequency vibrations (50 Hz), and the speed of shear waves propagating through the tissues is measured by ultrasound. The faster the vibrations propagate in the hepatic parenchyma, the stiffer the liver, which, in case of HF, can be correlated with hepatic congestion. Objective: In this systematic review, case-controls, cohort studies, and randomized clinical trials were searched in MEDLINE, LILACS and Cochrane Database of Systematic Review, to evaluate the use of elastography in the detection of hepatic congestion in patients with HF. Methods: From the 49 articles retrieved, seven were selected for review, according to the inclusion and exclusion criteria. The most used methods for the diagnosis and evaluation of HF were echocardiography combined with BNP and NT-proBNP measurements. Results: Elastography performed at bedside was able to establish a significant correlation between increased liver stiffness and increased venous capillary pressure. In addition, liver elastography performed at hospital discharge was able to predict rehospitalization and mortality. Conclusion: Liver elastography is a non-invasive method that can be useful in predicting prognosis and mortality of individuals with HF, contributing to the clinical management of these patients.

The predictive value of plasma B-type natriuretic peptide levels on outcome in children with pulmonary hypertension undergoing congenital heart surgery / O valor preditivo do peptídeo natriurético tipo-B em resultados de crianças com hipertensão pulmonar submetidas à cirurgia cardíaca congênita / El valor predictivo del plasma en niveles de péptido natriurético tipo B, y los resultados en niños con hipertensión pulmonar en proceso de cirugía de cardiopatía congénita

Background and objectives: In children undergoing congenital heart surgery, plasma brain natriuretic peptide levels may have a role in development of low cardiac output syndrome that is defined as a combination of clinical findings and interventions to augment cardiac output in children with pulmonary hypertension. Methods: In a prospective observational study, fifty-one children undergoing congenital heart surgery with preoperative echocardiographic study showing pulmonary hypertension were enrolled. The plasma brain natriuretic peptide levels were collected before operation, 12, 24 and 48 h after operation. The patients enrolled into the study were divided into two groups depending on: (1) Development of LCOS which is defined as a combination of clinical findings or interventions to augment cardiac output postoperatively; (2) Determination of preoperative brain natriuretic peptide cut-off value by receiver operating curve analysis for low cardiac output syndrome. The secondary end points were: (1) duration of mechanical ventilation ≥72 h, (2) intensive care unit stay >7days, and (3) mortality. Results: The differences in preoperative and postoperative brain natriuretic peptide levels of patients with or without low cardiac output syndrome (n = 35, n = 16, respectively) showed significant differences in repeated measurement time points (p = 0.0001). The preoperative brain natriuretic peptide cut-off value of 125.5 pg mL−1 was found to have the highest sensitivity of 88.9% and specificity of 96.9% in predicting low cardiac output syndrome in patients with pulmonary hypertension. A good correlation was found between preoperative plasma brain natriuretic peptide level and duration of mechanical ventilation (r = 0.67, p = 0.0001). Conclusions: In patients with pulmonary hypertension undergoing congenital heart surgery, 91% of patients with preoperative plasma brain natriuretic peptide levels above 125.5 pg mL−1 ...

Justificativa e objetivo: Em crianças submetidas à cirurgia cardíaca congênita, os níveis plasmáticos de peptídeo natriurético cerebral (PNC) podem ter um papel no desenvolvimento da síndrome de baixo débito cardíaco (SBDC), definida como uma combinação de achados clínicos e intervenções para aumentar o débito cardíaco em crianças com hipertensão pulmonar. Métodos: Em um estudo prospectivo observacional, foram inscritas 51 crianças submetidas à cirurgia cardíaca congênita, com avaliação ecocardiográfica pré-operatória que mostrava hipertensão pulmonar. Os níveis plasmáticos de PNC foram avaliados antes e 12, 24 e 48 h após a operação. Os pacientes incluídos no estudo foram divididos em dois grupos em função de: (1) desenvolvimento de SBDC; (2) determinação dos valores de corte de PNC no pré-operatório pela análise da curva de funcionamento do receptor para SBDC. Os desfechos secundários foram: (1) duração da ventilação mecânica ≥ 72 h, (2) permanência em unidade de terapia intensiva > 7 dias e (3) mortalidade. Resultados: Os níveis de PNC nos períodos pré- e pós-operatório dos pacientes com ou sem SBDC (n = 35, n = 16, respectivamente) apresentaram diferenças significantes nos tempos de mensuração repetidos (p = 0,0001). O valor de corte de PNC de 125,5 pg mL−1 no pré-operatório obteve a maior sensibilidade de 88,9% e especificidade de 96,9% para prever a SBDC em pacientes com hipertensão pulmonar. Uma boa correlação foi descoberta entre o nível plasmático de PNC no pré-operatório e duração a ventilação mecânica (r = 0,67, p = 0,0001). Conclusões: Em ...

Justificación y objetivo: En niños sometidos a cirugía de cardiopatía congénita, los niveles plasmáticos de péptido natriurético cerebral pueden tener un papel en el desarrollo del síndrome de bajo gasto cardíaco, definido como una combinación de hallazgos clínicos e intervenciones para aumentar el gasto cardíaco en niños con hipertensión pulmonar. Métodos: En un estudio prospectivo observacional, se inscribieron 51 niños sometidos a cirugía de cardiopatía congénita, y cuya evaluación ecocardiográfica preoperatoria mostró hipertensión pulmonar. Los niveles plasmáticos de péptido natriurético cerebral fueron evaluados antes de la operación, y 12, 24 y 48 h después de la operación. Los pacientes incluidos en el estudio fueron divididos en 2 grupos en función de: (1) desarrollo de síndrome de bajo gasto cardíaco, definido como una combinación de hallazgos clínicos o de intervenciones para aumentar el gasto cardíaco en el postoperatorio; (2) determinación de los valores de corte de péptido natriurético cerebral en el preoperatorio por el análisis de la curva de funcionamiento del receptor para el síndrome de bajo gasto cardíaco. Los resultados secundarios fueron: (1) duración de la ventilación mecánica ≥ 72 h, (2) permanencia en unidad de cuidados intensivos (UCI) > 7 días, y (3) mortalidad. Resultados: Los niveles de péptido natriurético cerebral en los períodos pre y postoperatorio de los pacientes con o sin síndrome de bajo gasto cardíaco (n = 35 y n = 16, respectivamente) tuvieron diferencias significativas en los tiempos de medida repetidos (p = 0,0001). El valor de corte de péptido natriurético cerebral de 125,5 pg/mL−1 en el preoperatorio obtuvo la mayor ...

Utilidad de los biomarcadores en insuficiencia cardiaca en la práctica clínica / Clinical usefulness of biomarkers in cardiac failure

The assessment of patients with a suspected cardiac failure aims to an early and precise diagnosis and risk stratification. Only natriuretic peptides have demonstrated to be clinically useful. Brain natriuretic peptide stands out due to its diagnostic and prognostic value. However its results should be cautiously interpreted in the clinical context, bearing in mind possible confounders. The combination of markers can provide a better risk stratification and compensates the limitations of individual markers. Each new marker gives a new insight on the underlying physiopathology of cardiac failure and proposes new therapeutic approaches.

B-natriuretic peptide, C- reactive protein and microalbuminuria in association with diastolic dysfunction, ankle brachial index and carotid duplex in type 2 diabetic female patients

Background: Cardiovascular diseases [CVD] is the leading cause of death in patients with type 2 diabetes accounting for 50-70% of all deaths [Berryet al., 2007] and it is believed that in 2020 CVD over-run infectious diseases and cancer to become the leading cause of death and disability, so the evidence is accumulating in favor of a wider use of several novel biomarkers in CVD [Dotsenko et al., 2007]

Aim of the work: 1- Evaluation of plasma BNP, hs-CRP and microalbuminuria as a risk biomarkers in detection of left ventricular diastolic dysfunction [LVDD], low ABI and increase in carotid intima- media thickness [CIMT] in asymptomatic type 2 diabetic female patients. 2- Detection of LVDD, peripheral arterial disease and carotid lesion in asymptomatic type 2 diabetic female patients in comparison to controls and their relation to cardiovascular risk biomarkers

Patients and methods: The study included 50 type 2 diabetic female patients [patient group] with duration of diabetes from 5-7 years and another age matched 40 female subjects were chosen as [control group]. Patients and controls were subjected to the following: history taking, body mass index [BMI], waist circumference, electrocardiography, echocardiography, ankle brachial index [ABI] and carotid duplex and laboratory investigations including; blood glucose, lipogram, serum creatinine, hemoglobin A1c [HbA1c,], BNP, hs -CRP and microalbuminuria

Results: -BNP, CRP and ,microalhuminuria significantly increased [P=0. 000] in diabetic patients versus controls. -There was significant LVDD, low ABJ and significant increase in CIMT in diabetic patients versus controls - Significant increase in BNP, CRP and microalbuminuria in patients having LVDD, low and in patients having increase in CIMT There was a significant positive correlation between diastolic dysfunction and CIMT with BNP, also there was significant negative correlation between ABI and BNP as a cardiovascular predictor at [p<0.05] with [r-square] [0. 778, 0.350 and 0.282] respectively

Conclusions: BNP, CRP and microalbuminuria are significant cardiovascular biomarkers in type 2 diabetic finale patients. BNP is a significant cardiovascular predictor for LVDD, low ABI and increase in CIMT

Predictors of asymptomatic cardiac events and prognostic value of cardiac biomarkers in chronic kidney disease patients

Patients with chronic kidney disease [CKD] are at increased risk of cardiovascular events; cardiovascular disease is a leading cause of death in patients with chronic kidney disease; Circulating biomarkers play a major role in the early detection of cardiovascular disease in those patients. To clarify the prevalence of asymptomatic different cardiac events in CKD and to explore the degree of elevation of N- terminal-pro-B-type Natriuretic Peptide [NT-pro-BNP] in asymptomatic cardiac patients with varying degree of CKD and the relationship between the elevation of this biomarker and the occurrence of these cardiac complications. This case-control study included 40 CKD patients and 40 controls; patients were recruited from nephrology unit of internal medicine department; Assiut university hospital; known to have chronic kidney disease in different grades [grade I- grade V]. Resting transthoracic echocardiography [TTE] and plasma NT-pro-BNP concentrations were measured in patients who were asymptomatic for clinical evidence of any cardiac events, [n=40; mean age 47.63 +/- 17.93 years; 52.5%were males] as well as healthy volunteers n=40; mean age 42.00 +/- 13.25; 62% were males]. In addition, the correlation between plasma NT-pro-BNP concentration and parameters of echocardiography was examined. Increased prevalence of left ventricular hypertrophy [LVH] [70%]; left ventricular diastolic dysfunction [77.5%], left ventricular systolic dysfunction [17.5%] and coronary artery disease [27.5%] in CKD patients as well as serum NT-pro-BNP levels in the patients were significantly higher [6703.75 +/- 2947.68 pg/ml] than those in healthy volunteers [124.83 +/- 140.40 pg/ml] [p=0.000]. NT-pro-BNP level was higher also in patients who had hypertension [p=0.002]; anemia [p-0.004]; hypoalbuminamia [p=0.000];left ventricular hypertrophy [LVH] [7873. 57 +/- 2719. 31 pg/ml] [p = 0.000], diastolic dysfunction [7524. 52 +/- 2824.74 pg/ml] [p= 0.000]; systolic dysfunction [10371.43 +/- 2771.71] [p=0.000] and patients who had segmental wall motion abnormality [SWMA] [8709.0.9 +/- 3512.3.9] [p=0.000] and correlate Positively with C reactive protein [CRP] level [r-0.751 p=0.000]; left ventricular mass [LVM] [r=0.772 p=0.000] and left ventricular mass index [LVMI] [r=0.715 p=0.000] and negatively with ejection fraction [EF] by echocardiography [r=-0.483 p=0.000]. NT-pro-BNP level elevation in asymptomatic patients with CKD reflects underlying cardiac dysfunction, ischemic heart disease and hypertrophy independent of renal function

Central actions of glucocorticoids in the control of body fluid homeostasis: review

The involvement of the hypothalamic-pituitary-adrenal axis in the control of body fluid homeostasis has been extensively investigated in the past few years. In the present study, we reviewed the recent results obtained using different approaches to investigate the effects of glucocorticoids on the mechanisms of oxytocin and vasopressin synthesis and secretion in response to acute and chronic plasma volume and osmolality changes. The data presented here suggest that glucocorticoids are not only involved in the mechanisms underlying the fast release but also in the transcriptional events that lead to decreased synthesis and secretion of these neuropeptides, particularly oxytocin, under diverse experimental conditions of altered fluid volume and tonicity. The endocannabinoid system, through its effects on glutamatergic neurotransmission within the hypothalamus and the nuclear factor κB-mediated transcriptional activity, seems to be also involved in the specific mechanisms by which glucocorticoids exert their central effects on neurohypophyseal hormone synthesis and secretion.