| 1. |
- Povinec, Pavel, et al.
(författare)
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Reference material for radionuclides in sediment. IAEA-384 (Fangataufa lagoon sediment).
- 2007
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Ingår i: Journal of Radioanalytical and Nuclear Chemistry. - Dordrecht : Springer. - 0236-5731 .- 1588-2780. ; 273:2, s. 383-393
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Tidskriftsartikel (refereegranskat)abstract
- A reference material designed for the determination of anthropogenic and natural radionuclides in sediment, IAEA-384 (Fangataufa Lagoon sediment), is described and the results of certification are presented. The material has been certified for 8 radionuclides (40K, 60Co, 155Eu, 230Th, 238U, 238Pu, 239+240Pu and 241Am). Information values are given for 12 radionuclides (90Sr, 137Cs, 210Pb (210Po), 226Ra, 228Ra, 232Th, 234U, 235U, 239Pu, 240Pu and 241Pu). Less reported radionuclides include 228Th, 236U, 239Np and 242Pu. The reference material may be used for quality management of radioanalytical laboratories engaged in the analysis of radionuclides in the environment, as well as for the development and validation of analytical methods and for training purposes. The material is available from IAEA in 100 g units.
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| 2. |
- Hogenhuis, Jochem, et al.
(författare)
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Anaemia and renal dysfunction are independently associated with BNP and NT-proBNP levels in patients with heart failure.
- 2007
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Ingår i: European Journal of Heart Failure. - : Wiley. - 1388-9842 .- 1879-0844. ; 9:8, s. 787-94
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: Anaemia may affect B-type natriuretic peptide (BNP) and N-terminal proBNP (NT-proBNP) levels, but this has not been well described in heart failure (HF) patients without the exclusion of patients with renal dysfunction. AIMS: To study the influence of both anaemia and renal function on BNP and NT-proBNP levels in a large group of hospitalised HF patients. METHODS AND RESULTS: We studied 541 patients hospitalised for HF (mean age 71+/-11 years, 62% male, and left ventricular ejection fraction 0.33+/-0.14). Of these patients, 30% (n=159) were anaemic (women: Hb<7.5 mmol/l, men: Hb<8.1 mmol/l). Of the 159 anaemic patients, 73% had renal dysfunction (eGFR<60 ml/min/1.73 m2) and of the non-anaemic patients, 57% had renal dysfunction. BNP and NT-proBNP levels were measured in all patients before discharge. In multivariable analyses both plasma haemoglobin and eGFR were independently related to the levels of BNP and NT-proBNP (standardised beta's of -0.16, -0.14 [BNP] and -0.19, -0.26 [NT-proBNP] respectively, P-values<0.01). CONCLUSION: Anaemia and renal dysfunction are related to increased BNP and NT-proBNP levels, independent of the severity of HF. These results indicate that both anaemia and renal dysfunction should be taken into consideration during the interpretation of BNP and NT-proBNP levels in HF patients.
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| 3. |
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| 4. |
- Wong, Liza S M, et al.
(författare)
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Renal dysfunction is associated with shorter telomere length in heart failure.
- 2009
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Ingår i: Clinical research in cardiology : official journal of the German Cardiac Society. - : Springer Science and Business Media LLC. - 1861-0692. ; 98:10, s. 629-34
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: Renal dysfunction is a frequent comorbidity associated with high mortality in patients with chronic heart failure (CHF). The intrinsic biological age might affect the ability of the kidney to cope with the challenging environment caused by CHF. We explored the association between leukocyte telomere length, a marker for biological age, and renal function in patients with CHF. METHODS AND RESULTS: Telomere length was determined by a real-time quantitative polymerase chain reaction in 866 CHF patients. Renal function was estimated with the simplified Modification of Diet in Renal Disease equation. The median age was 74 (interquartile range 64-79) years, 61% male, left ventricular ejection fraction of 30 (23-44)%, and the estimated glomerular filtration rate was 53 (40-68) ml/min/1.73 m(2). Telomere length was associated with renal function (correlation coefficient 0.123, P < 0.001). This relationship remained significant after adjustment for age, gender, age of CHF onset (standardized-beta 0.091, P = 0.007). Also additionally adjusting for the severity of CHF and baseline differences did not change our findings. CONCLUSION: The association between shorter leukocyte telomere length and reduced renal function in heart failure suggests that intrinsic biological aging affects the ability of the kidney to cope with the systemic changes evoked by heart failure.
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| 5. |
- Damman, Kevin, et al.
(författare)
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Both in- and out-hospital worsening of renal function predict outcome in patients with heart failure : results from the Coordinating Study Evaluating Outcome of Advising and Counseling in Heart Failure (COACH).
- 2009
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Ingår i: European Journal of Heart Failure. - : Wiley. - 1388-9842 .- 1879-0844. ; 11:9, s. 847-54
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Tidskriftsartikel (refereegranskat)abstract
- AIMS: The effect of worsening renal function (WRF) after discharge on outcome in patients with heart failure is unknown. METHODS AND RESULTS: We assessed estimated glomerular filtration rate (eGFR) and serum creatinine at admission, discharge, and 6 and 12 months after discharge, in 1023 heart failure patients. Worsening renal function was defined as an increase in serum creatinine of >26.5 micromol/L and >25%. The primary endpoint was a composite of all-cause mortality and heart failure admissions. The mean age of patients was 71 +/- 11 years, and 62% was male. Mean eGFR at admission was 55 +/- 21 mL/min/1.73 m(2). In-hospital WRF occurred in 11% of patients, while 16 and 9% experienced WRF from 0 to 6, and 6 to 12 months after discharge, respectively. In multivariate landmark analysis, WRF at any point in time was associated with a higher incidence of the primary endpoint: hazard ratio (HR) 1.63 (1.10-2.40), P = 0.014 for in-hospital WRF, HR 2.06 (1.13-3.74), P = 0.018 for WRF between 0-6 months, and HR 5.03 (2.13-11.88), P < 0.001 for WRF between 6-12 months. CONCLUSION: Both in- and out-hospital worsening of renal function are independently related to poor prognosis in patients with heart failure, suggesting that renal function in heart failure patients should be monitored long after discharge.
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| 6. |
- Hogenhuis, Jochem, et al.
(författare)
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Correlates of B-type natriuretic peptide and 6-min walk in heart failure patients.
- 2006
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Ingår i: International Journal of Cardiology. - : Elsevier BV. - 0167-5273 .- 1874-1754. ; 108:1, s. 63-7
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: B-type natriuretic peptide (BNP) and 6-min walk test (6MWT) are both related to the severity and prognosis in chronic heart failure (CHF), but may reflect different aspects of CHF. We related BNP and 6MWT to left ventricular ejection fraction (LVEF), New York Heart Association functional class (NYHA), and two indices of quality of life (physical subscales): the Minnesota Living with Heart Failure Questionnaire (MLwHFQph) and the RAND-36ph. METHODS: Plasma BNP and 6MWT were measured at discharge in 229 patients who had been admitted for CHF. LVEF and NYHA were determined, and patients completed the MLwHFQ and RAND-36 questionnaires. RESULTS: BNP was weakly correlated to LVEF (r=-0.29, P<0.01) and NYHA (r=0.20, P<0.01), but not to MLwHFQph and RAND-36ph. On the other hand, 6MWT is related to MLwHFQph (r=-0.23, P<0.01), RAND-36ph (r=0.52, P<0.01), and NYHA (r=-0.46, P<0.01), but not to LVEF (r=-0.15, P=0.05). There is also no correlation between BNP and 6MWT (r=-0.01, P=0.87). CONCLUSIONS: The present data show that BNP and 6MWT represent different aspects of the clinical syndrome of CHF. The outcomes of this study suggest that BNP plasma levels are more related to cardiac function, while 6MWT reflects functional capacity and quality of life.
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| 7. |
- Hogenhuis, Jochem, et al.
(författare)
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Influence of age on natriuretic peptides in patients with chronic heart failure : a comparison between ANP/NT-ANP and BNP/NT-proBNP.
- 2005
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Ingår i: European Journal of Heart Failure. - : Wiley. - 1388-9842 .- 1879-0844. ; 7:1, s. 81-86
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: Natriuretic peptides are currently used in the diagnosis and follow-up of patients with Chronic Heart Failure (CHF). However, it is unknown whether there are different influences of age on atrial natriuretic peptide (ANP)/N-terminal-ANP (NT-ANP) or B-type natriuretic peptide (BNP)/N-terminal-proBNP (NT-proBNP). AIMS: To compare the influence of age and gender on plasma levels of ANP/NT-ANP and BNP/NT-proBNP in CHF patients. METHODS AND RESULTS: Natriuretic peptides were measured in 311 CHF patients (68+/-8 years, 76% males, left ventricular ejection fraction (LVEF) 0.23+/-0.08). All natriuretic peptides were significantly related to age (p<0.05) on multivariate regression analysis, with partial correlation coefficients of 0.18, 0.29, 0.28 and 0.25 for ANP, NT-ANP, BNP and NT-proBNP, respectively. The relative increase of both BNP/NT-proBNP were more pronounced than of ANP/NT-ANP (p<0.01). Furthermore, the relative increase of BNP with age was markedly larger than of NT-proBNP (p<0.01). Levels of all natriuretic peptides were also significantly related to cardiothoracic ratio, renal function and LVEF. CONCLUSION: In patients with CHF, BNP/NT-proBNP were more related to age than ANP/NT-ANP, and BNP was more related to age than NT-proBNP. However, in these CHF patients the influence of age on the levels of all natriuretic peptides was modest, and comparable to several other factors.
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| 8. |
- Hogenhuis, Jochem, et al.
(författare)
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Low prevalence of B-type natriuretic peptide levels < 100 pg/mL in patients with heart failure at hospital discharge.
- 2006
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Ingår i: American Heart Journal. - : Elsevier BV. - 0002-8703 .- 1097-6744. ; 151:5, s. 1012.e1-5
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: In patients with acute heart failure (HF) presenting at the emergency department, a B-type natriuretic peptide (BNP) level < 100 pg/mL was found in only 10% of the patients. However, in a more stable outpatient HF population from another study, a BNP level < 100 pg/mL was found in as many as 21% of the patients. Therefore, we aimed to investigate the prevalence and characteristics of stabilized patients with BNP levels < 100 pg/mL before discharge after admission for decompensated heart failure HF. METHODS: We investigated 601 patients with HF who were part of a large-scale multicenter study in The Netherlands. All patients had been admitted for decompensated HF, and their BNP levels were measured before discharge when they had been clinically stabilized. Clinical characteristics of patients with BNP levels < 100 and > or = 100 pg/mL were compared. RESULTS: Patients were 70 +/- 12 years old, 61% were men, and mean left ventricular ejection fraction was 0.34 +/- 0.14. Of these patients, 10% had BNP levels < 100 pg/mL. Patients with a BNP level < 100 pg/mL were similar in age and sex but had higher left ventricular ejection fraction (0.41 +/- 0.14 vs 0.33 +/- 0.13, P < .001), body mass index, and hemoglobin and hematocrit concentrations compared with those with BNP levels > or = 100 pg/mL. CONCLUSIONS: In clinically stable patients with a recent admission for decompensated HF, only 10% had BNP levels > or = 100 pg/mL. These patients with low BNP levels seemed to have less severe HF and more frequently had preserved systolic function compared with patients with BNP levels > or = 100 pg/mL.
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