Diálisis peritoneal ambulatoria continua y evolución clínica de pacientes con insuficiencia cardiaca congestiva refractaria / Continuous ambulatory peritoneal dialysis and clinical outcomes in patients with refractory congestive heart failure

Introducción y objetivos. Se ha propuesto el empleo de la diálisis peritoneal como alternativa para los pacientes con insuficiencia cardiaca congestiva refractaria. El objetivo de este estudio es evaluar su efecto en la evolución clínica a largo plazo de los pacientes con insuficiencia cardiaca avanzada y disfunción renal. Métodos. Se invitó a un total de 62 pacientes, con insuficiencia cardiaca avanzada (clase III/IV), disfunción renal (filtrado glomerular < 60ml/min/1,73 m2), congestión persistente por exceso de líquidos a pesar del tratamiento con diuréticos de asa y al menos dos hospitalizaciones previas por insuficiencia cardiaca, a participar en un programa de diálisis peritoneal ambulatoria continua. De ellos, se excluyó a 34 y se los asignó al grupo control. Las razones de exclusión más importantes fueron la negativa a participar, la incapacidad de aplicar la técnica y la presencia de defectos de la pared abdominal. El objetivo primario fue la mortalidad por cualquier causa y la combinación de mortalidad y reingreso por insuficiencia cardiaca. Para tener en cuenta el desequilibrio existente en la situación basal, se estimó una puntuación de propensión que se utilizó como ponderación en todos los análisis. Resultados. Los grupos de diálisis peritoneal (n = 28) y de control (n = 34) eran similares respecto a todas las covariables basales. Durante una mediana de seguimiento de 16 meses, 39 (62,9%) fallecieron, 21 (33,9%) pacientes fueron rehospitalizados por insuficiencia cardiaca y 42 (67,8%) presentaron el objetivo combinado. En los modelos ajustados según la puntuación de propensión, la diálisis peritoneal, comparada con el grupo control, se asoció a una reducción sustancial del riesgo de mortalidad en el seguimiento completo (razón de riesgos = 0,40; intervalo de confianza del 95%, 0,21-0,75; p = 0,005), la mortalidad evaluada con los días de vida fuera del hospital (razón de riesgos = 0,39; intervalo de confianza del 95%, 0,21-0,74; p = 0,004) y el objetivo combinado (razón de riesgos = 0,32; intervalo de confianza del 95%, 0,17-0,61; p = 0,001). Conclusiones. En la insuficiencia cardiaca congestiva refractaria con disfunción renal concomitante, la diálisis peritoneal se asoció a una mejoría de la evolución clínica a largo plazo (AU)

Introduction and objectives. Peritoneal dialysis has been proposed as a therapeutic alternative for patients with refractory congestive heart failure. The objective of this study was to assess its effect on long-term clinical outcomes in patients with advanced heart failure and renal dysfunction. Methods. A total of 62 patients with advanced heart failure (class III/IV), renal dysfunction (glomerular filtration<60mL/min/1.73 m2), persistent fluid congestion despite loop diuretic treatment and at least 2 previous hospitalizations for heart failure were invited to participate in a continuous ambulatory peritoneal dialysis program. Of these, 34 patients were excluded and adjudicated as controls. The most important reasons for exclusion were refusal to participate, inability to perform the technique and abdominal wall defects. The primary endpoint was all-cause mortality and the composite of death/readmission for heart failure. To account for baseline imbalance, a propensity score was estimated and used as a weight in all analyses. Results. The peritoneal dialysis (n=28) and control groups (n=34) were alike in all baseline covariates. During a median follow-up of 16 months, 39 (62.9%) died, 21 (33.9%) patients were rehospitalization for heart failure, and 42 (67.8%) experienced the composite endpoint. In the propensity score-adjusted models, peritoneal dialysis (vs control group) was associated with a substantial reduction in the risk of mortality using complete follow-up (hazard ratio=0.40; 95% confidence interval, 0.21-0.75; P=.005), mortality using days alive and out of hospital (hazard ratio=0.39; 95% confidence interval, 0.21-0.74; P=.004) and the composite endpoint (hazard ratio=0.32; 95% confidence interval, 0.17-0.61; P=.001). Conclusions. In refractory congestive heart failure with concomitant renal dysfunction, peritoneal dialysis was associated with long-term improvement in clinical outcomes (AU)

Continuous ambulatory peritoneal dialysis and clinical outcomes in patients with refractory congestive heart failure.

INTRODUCTION AND OBJECTIVES: Peritoneal dialysis has been proposed as a therapeutic alternative for patients with refractory congestive heart failure. The objective of this study was to assess its effect on long-term clinical outcomes in patients with advanced heart failure and renal dysfunction. METHODS: A total of 62 patients with advanced heart failure (class III/IV), renal dysfunction (glomerular filtration<60 mL/min/1.73 m(2)), persistent fluid congestion despite loop diuretic treatment and at least 2 previous hospitalizations for heart failure were invited to participate in a continuous ambulatory peritoneal dialysis program. Of these, 34 patients were excluded and adjudicated as controls. The most important reasons for exclusion were refusal to participate, inability to perform the technique and abdominal wall defects. The primary endpoint was all-cause mortality and the composite of death/readmission for heart failure. To account for baseline imbalance, a propensity score was estimated and used as a weight in all analyses. RESULTS: The peritoneal dialysis (n=28) and control groups (n=34) were alike in all baseline covariates. During a median follow-up of 16 months, 39 (62.9%) died, 21 (33.9%) patients were rehospitalization for heart failure, and 42 (67.8%) experienced the composite endpoint. In the propensity score-adjusted models, peritoneal dialysis (vs control group) was associated with a substantial reduction in the risk of mortality using complete follow-up (hazard ratio=0.40; 95% confidence interval, 0.21-0.75; P=.005), mortality using days alive and out of hospital (hazard ratio=0.39; 95% confidence interval, 0.21-0.74; P=.004) and the composite endpoint (hazard ratio=0.32; 95% confidence interval, 0.17-0.61; P=.001). CONCLUSIONS: In refractory congestive heart failure with concomitant renal dysfunction, peritoneal dialysis was associated with long-term improvement in clinical outcomes. Full English text available from:www.revespcardiol.org.

Continuous ambulatory peritoneal dialysis as a therapeutic alternative in patients with advanced congestive heart failure.

AIMS: Continuous ambulatory peritoneal dialysis (CAPD) has been proposed as an additional therapeutic resource for patients with advanced congestive heart failure (CHF). The objective of this study was to determine the therapeutic role of CAPD, in terms of surrogate endpoints, in the management of patients with advanced CHF and renal dysfunction. METHODS AND RESULTS: A total of 57 candidates with New York Heart Association (NYHA) class III/IV CHF, renal dysfunction (glomerular filtration rate < 60 mL/min/1.73 m(2)), persistent fluid congestion despite loop diuretic treatment, and at least two previous hospitalizations for acute heart failure (AHF) were invited to be included in the CAPD programme; however, 25 patients were finally included. The primary outcome was evaluated by the change at 6 and 24 weeks for the Minnesota Living With Heart Failure Questionnaire (MLWHFQ), the 6 min walk test (6MWT), NYHA class, serum natriuretic peptides [brain natriuretic peptide (BNP) and N-terminal proBNP (NT-proBNP)], serum carbohydrate antigen 125 (CA125), and hospitalization rates for AHF. CAPD was associated with a substantial improvement in the MLWHFQ (-21.3, P < 0.001; and -20.4, P < 0.001), the 6MWT (54.0, P < 0.001; and 45.6, P = 0.023), and NYHA class (-1.0, P < 0.001; and -1.4, P < 0.001) at 6 and 24 weeks, respectively. The Ln(CA125) decreased markedly (-0.8, P = 0.003; and -0.98, P = 0.003), with no effect on BNP and NT-proBNP. There was a marked reduction in the number of days hospitalized for AHF (6 month post-CAPD vs. 6 months pre-CAPD: -84%; P < 0.001). CONCLUSIONS: In advanced CHF and renal dysfunction, CAPD was associated with short/mid-term improvement in severity parameters, with an acceptable rate of side effects.

Intravenous N-acetylcysteine for preventing contrast-induced nephropathy: a randomised trial.

BACKGROUND: Studies evaluating the role of N-acetylcysteine in patients undergoing coronary angiography have yielded inconsistent data. Less is known about patients with normal renal function at baseline. METHODS: Prospective, double-blind, placebo-controlled trial to determine the benefits of intravenous N-acetylcysteine as an adjunct to hydration in this kind of population. Patients were randomly assigned to receive either N-acetylcysteine (600 mg twice daily) or placebo, in addition to 0.45% intravenous saline. The primary end point was development of contrast-induced nephropathy, defined as an acute increase in the serum creatinine concentration > or = 0.5 mg/dl and/or > 25% increase above baseline level at 48 h after contrast dosing. RESULTS: A total of 216 patients were studied: N-acetylcysteine = 107 and placebo = 109. Treatment groups were similar with respect to baseline clinical characteristics. Overall incidence of contrast-induced nephropathy was 10.2%, 10.3% in the N-acetylcysteine group and 10.1% in the placebo group. Furthermore, no significant differences were observed when considering the non-diabetic population, although there was a trend towards a protective effect of N-acetylcysteine in the subgroup of 47 patients with both hypertension and diabetes. There were no significant changes in serum urea nitrogen concentrations. The incidence of in-hospital adverse clinical events was low: no patient with contrast-induced nephropathy required dialysis, the median Coronary Unit stay was 4.5 vs. 4 days, and the mortality rate was 2.8% vs. 4.6% in the N-acetylcysteine and placebo groups, respectively (p=NS). CONCLUSIONS: The prophylactic administration of intravenous N-acetylcysteine provides no additional benefit to saline hydration in high-risk coronary patients with normal renal function.

Comorbidity and mortality in peritoneal dialysis: a comparative study of type 1 and 2 diabetes versus nondiabetic patients. Peritoneal dialysis and diabetes.

We conducted a retrospective study with 750 peritoneal dialysis (PD) patients in a Spanish multicenter registry between 1993 and 1999 to analyze comorbidity and mortality in type 1 diabetes (T1D), type 2 diabetes (T2D) and nondiabetic (ND) patients. 163 patients (21.7%) were diabetic--96 T1D (58.8%) and 67 T2D (42.2%)--while 587 were not (78.3%). Different comorbidity factors such as the presence of cardiovascular disease, age over 70 and dyslipidemia at the start of PD were analyzed as well as the incidence of peritonitis, the peritonitis-free interval, need for hospitalization, mortality rate, early mortality rate, survival curves (log rank) and the impact factor (Cox) on mortality for the different variables. The comorbidity index (number of comorbidity factors when starting the treatment) and the peritonitis incidence were higher for T2D. Hospitalization rates were similar, but mortality rates were higher for T2D and early mortality rates (death during the 1st year of treatment) were higher for T1D. The actuarial survival curves showed a higher mortality for T2D with no differences between ND and T1D after adjustment for age. The mortality odds ratio was 1.78 for T2D and 1.13 for T1D, differences which were not significant after adding age over 70 and cardiovascular disease to the variables analyzed. Our results show that associated comorbidity is the most important difference between ND, T1D and T2D. While cardiovascular comorbidity is responsible for the higher percentage of early mortality found in T1D when compared to ND, both age and cardiovascular disease are responsible for the higher comorbidity and mortality found in T2D.