47 results on '"Wiinberg, Niels"'
Search Results
2. Prognostic implications of myocardial perfusion imaging by 82-rubidium positron emission tomography in male and female patients with angina and no perfusion defects.
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Rauf, Maira, Hansen, Kim W, Galatius, Søren, Wiinberg, Niels, Brinth, Louise Scouborg, Højstrup, Signe, Talleruphuus, Ulrik, and Prescott, Eva
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MYOCARDIUM ,VENTRICULAR ejection fraction ,CONFIDENCE intervals ,MYOCARDIAL ischemia ,ANGINA pectoris ,ATRIAL fibrillation ,SEX distribution ,POSITRON emission tomography ,CORONARY artery disease ,BLOOD circulation ,RESEARCH funding ,PERFUSION imaging ,PERFUSION ,PROPORTIONAL hazards models ,SYMPTOMS - Abstract
Aims Myocardial perfusion imaging with 82-rubidium positron emission tomography (
82 Rb-PET) is increasingly used to assess stable coronary artery disease (CAD). We aimed to evaluate the prognostic value of82 Rb-PET-derived parameters in patients with symptoms suggestive of CAD but no significant reversible or irreversible perfusion defects. Methods and results Among 3726 consecutive patients suspected of stable CAD who underwent82 Rb-PET between January 2018 and August 2020, 2175 had no regional perfusion defects. Among these patients, we studied the association of82 Rb-PET-derived parameters with a composite endpoint of all-cause mortality, hospitalization for unstable angina pectoris, acute myocardial infarction, heart failure, or ischaemic stroke. During a median follow up of 1.7 years (interquartile range 1.1–2.5 years), there were 148 endpoints. Myocardial blood flow (MBF) reserve (MFR), MBF during stress, left ventricular ejection fraction (LVEF), LVEF-reserve, heart rate reserve, and Ca score were associated with adverse outcomes. In multivariable Cox model adjusted for patient and82 Rb-PET characteristics, MFR < 2 (hazard ratio (HR) 1.75, 95% confidence interval (CI) 1.24–2.48), LVEF (HR 1.38 per 10% decrease, 95% CI 1.24–1.54), and LVEF-reserve (HR 1.19 per 5% decrease, 95% CI 1.07–1.31) were significant predictors of endpoints. Results were consistent in subgroups defined by gender, history of ischaemic heart disease, low LVEF, and atrial fibrillation. Conclusion MFR, LVEF, and LVEF-reserve derived from82 Rb-PET provide prognostic information on cardiovascular outcomes in patients with no perfusion defects. This may aid in identifying patients at risk and might provide an opportunity for preventive interventions. [ABSTRACT FROM AUTHOR]- Published
- 2023
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3. Progression in risk factors during 36 years of follow-up and prediction of carotid intima-media thickness in a large cohort of adults with and without diabetes.
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Winckler, Karoline, Wiinberg, Niels, Jensen, Andreas Kryger, Thorsteinsson, Birger, Lundby-Christensen, Louise, Heitmann, Berit Lilienthal, Jensen, Gorm Boje, and Tarnow, Lise
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CAROTID intima-media thickness ,DISEASE progression ,DIABETES ,BODY mass index ,SMOKING - Abstract
Carotid intima-media thickness (IMT) can assess the cumulative effect of atherosclerotic risk factors and provides an independent predictor of future cardiovascular (CV) risk. The aim of this study was to investigate the progression of conventional risk factors in 933 long-term survivors from a Danish cohort with and without diabetes mellitus (DM) as predictors for attained carotid IMT during 35.6 (0.7) years of follow-up. Persons who participated in the first, the last and one of the intermediate rounds of the Copenhagen City Heart Study, and who had had an ultrasound-derived measure of the carotid IMT performed at the last examination were included in the analyses. The risk factors varied between persons with and without DM during the 36 years, but the difference in blood pressure disappeared in the fifth examination, where, in addition, total cholesterol was found to be lower in persons with DM. In this cohort there were no difference in attained carotid IMT between persons with and without DM at the last examination. The following risk factors were found to best predict carotid IMT: age, maximum systolic BP, average systolic BP, average BMI, minimum BMI, sex and years of smoking. The prediction of carotid IMT was clinically poor with a root mean-squared error of prediction (RMSEP) of 0.134 mm and a 95% prediction error probability interval of (-0.22; 0.30). Furthermore, the distribution of prediction errors was skewed to the right indicating that the prediction errors were larger among persons with high carotid IMT. [ABSTRACT FROM AUTHOR]
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- 2020
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4. Metformin may adversely affect orthostatic blood pressure recovery in patients with type 2 diabetes: substudy from the placebo-controlled Copenhagen Insulin and Metformin Therapy (CIMT) trial.
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Hansen, Christian Stevns, Lundby-Christiansen, Louise, Tarnow, Lise, Gluud, Christian, Hedetoft, Christoffer, Thorsteinsson, Birger, Hemmingsen, Bianca, Wiinberg, Niels, Sneppen, Simone B., Lund, Søren S., Krarup, Thure, Madsbad, Sten, Almdal, Thomas, Carstensen, Bendix, Jørgensen, Marit E., the CIMT study group, Almdal, T., Boesgaard, T. W., Breum, L., and Gade-Rasmussen, B.
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TYPE 2 diabetes ,BLOOD pressure ,INSULIN ,SYSTOLIC blood pressure ,METFORMIN - Abstract
Background: Metformin has been shown to have both neuroprotective and neurodegenerative effects. The aim of this study was to investigate the effect of metformin in combination with insulin on cardiovascular autonomic neuropathy (CAN) and distal peripheral neuropathy (DPN) in individuals with type 2 diabetes (T2DM). Methods: The study is a sub-study of the CIMT trial, a randomized placebo-controlled trial with a 2 × 3 factorial design, where 412 patients with T2DM were randomized to 18 months of metformin or placebo in addition to open-labelled insulin. Outcomes were measures of CAN: Changes in heart rate response to deep breathing (beat-to-beat), orthostatic blood pressure (OBP) and heart rate and vibration detection threshold (VDT) as a marker DPN. Serum levels of vitamin B12 and methyl malonic acid (MMA) were analysed. Results: After 18 months early drop in OBP (30 s after standing) was increased in the metformin group compared to placebo: systolic blood pressure drop increased by 3.4 mmHg (95% CI 0.6; 6.2, p = 0.02) and diastolic blood pressure drop increased by 1.3 mmHg (95% CI 0.3; 2.6, p = 0.045) compared to placebo. Beat-to-beat variation decreased in the metformin group by 1.1 beats per minute (95% CI − 2.4; 0.2, p = 0.10). Metformin treatment did not affect VDT group difference − 0.33 V (95% CI − 1.99; 1.33, p = 0.39) or other outcomes. Changes in B12, MMA and HbA
1c did not confound the associations. Conclusions: Eighteen months of metformin treatment in combination with insulin compared with insulin alone increased early drop in OBP indicating an adverse effect of metformin on CAN independent of vitamin B12, MMA HbA1c . Trial registration The protocol was approved by the Regional Committee on Biomedical Research Ethics (H–D-2007-112), the Danish Medicines Agency and registered with ClinicalTrials.gov (NCT00657943). [ABSTRACT FROM AUTHOR]- Published
- 2020
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5. Carotid intima media thickness and ankle brachial index are inversely associated in subjects with and without diabetes.
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Winckler, Karoline, Wiinberg, Niels, Jensen, Andreas Kryger, Thorsteinsson, Birger, Lundby-Christensen, Louise, Heitmann, Berit Lilienthal, Jensen, Gorm Boje, and Tarnow, Lise
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Carotid intima-media thickness (IMT) and ankle brachial index (ABI) are non-invasive indicators of generalised atherosclerosis. The aim was to determine the association between carotid IMT and ABI in subjects with and without diabetes mellitus (DM), and to analyse specific age change-points. We included 2744 subjects from the Copenhagen City Heart Study (mean age (SD) 56.6 (17.2) years, 56.8% women and body mass index (BMI) 25.4 (4.1) kg/m2). Carotid IMT and ABI measurements were performed during the fifth examination. Of the 2744 subjects, 125 subjects (4.6%) had DM. Average carotid IMT was 0.667 (0.145) mm and ABI was 1.06 (0.14). Subjects with DM were older, had higher BMI and systolic blood pressure (SBP) (all p < .001). Carotid IMT was higher in subjects with DM (0.754 (0.150) mm) compared to subjects without DM (0.662 (0.144) mm) (p < .001), whereas there was no difference in ABI between the two groups. ABI was inversely associated with carotid IMT (slope = -0.17 [-0.207; -0.137] (p < .001). The association remained significant after adjustment for risk factors both in subjects with DM (slope = -0.168 [-0.328; -0.007], p = .040), and in subjects without DM (slope = -0.100 [-0.148; -0.052], p < .001), with a stronger effect of carotid IMT on ABI among subjects with DM. Carotid IMT and ABI were inversely associated in subjects with DM and without DM, but with a stronger effect in subjects with DM. Age and ABI revealed a change-point with a stronger inverse association among subjects aged >60 years. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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6. Intensive versus conventional blood pressure monitoring in a general practice population. The Blood Pressure Reduction in Danish General Practice trial: a randomized controlled parallel group trial.
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Klarskov, Pia, Bang, Lia E, Schultz-Larsen, Peter, Petersen, Hans Gregers, Olsen, David Benee, Berg, Ronan M G, Abrahamsen, Henrik, Wiinberg, Niels, Gregers Petersen, Hans, and Benee Olsen, David
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BLOOD pressure ,AMBULATORY blood pressure monitoring ,CARDIOVASCULAR diseases ,MEDICAL care ,FEAR of doctors ,ANTIHYPERTENSIVE agents ,FAMILY medicine ,HOME care services ,HYPERTENSION ,STATISTICAL sampling ,RANDOMIZED controlled trials - Abstract
Objective: To compare the effect of a conventional to an intensive blood pressure monitoring regimen on blood pressure in hypertensive patients in the general practice setting.Design: Randomized controlled parallel group trial with 12-month follow-up.Setting: One hundred and ten general practices in all regions of Denmark.Participants: One thousand forty-eight patients with essential hypertension.Intervention: Conventional blood pressure monitoring ('usual group') continued usual ad hoc blood pressure monitoring by office blood pressure measurements, while intensive blood pressure monitoring ('intensive group') supplemented this with frequent home blood pressure monitoring and 24-hour ambulatory blood pressure monitoring.Primary outcome measures: Mean day- and night-time systolic and diastolic 24-hour ambulatory blood pressure.Secondary outcome measures: Change in systolic and diastolic office blood pressure and change in cardiovascular risk profile.Results: Of the patients, 515 (49%) were allocated to the usual group, and 533 (51%) to the intensive group. The reductions in day- and night-time 24-hour ambulatory blood pressure were similar (usual group: 4.6 ± 13.5/2.8 ± 82 mmHg; intensive group: 5.6 ± 13.0/3.5 ± 8.2 mmHg; P = 0.27/P = 0.20). Cardiovascular risk scores were reduced in both groups at follow-up, but more so in the intensive than in the usual group (P = 0.02).Conclusion: An intensive blood pressure monitoring strategy led to a similar blood pressure reduction to conventional monitoring. However, the intensive strategy appeared to improve patients' cardiovascular risk profile through other effects than a reduction of blood pressure.Trial registration: Clinical Trials NCT00244660. [ABSTRACT FROM AUTHOR]- Published
- 2018
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7. Associations between glycaemic deterioration and aortic stiffness and central blood pressure: the ADDITION-PRO Study.
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Johansen, Nanna B., Rasmussen, Signe S., Wiinberg, Niels, Vistisen, Dorte, Jørgensen, Marit E., Pedersen, Erling B., Lauritzen, Torsten, Sandbæk, Annelli, and Witte, Daniel R.
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- 2017
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8. Effects of biphasic, basal-bolus or basal insulin analogue treatments on carotid intima-media thickness in patients with type 2 diabetes mellitus: the randomised Copenhagen Insulin and Metformin Therapy (CIMT) trial.
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Lundby-Christensen, Louise, Vaag, Allan, Tarnow, Lise, Almdal, Thomas P., Lund, Søren S., Wetterslev, Jørn, Gluud, Christian, Boesgaard, Trine W., Wiinberg, Niels, Perrild, Hans, Krarup, Thure, Snorgaard, Ole, Gade-Rasmussen, Birthe, Thorsteinsson, Birger, Røder, Michael, Mathiesen, Elisabeth R., Jensen, Tonny, Vestergaard, Henrik, Hedetoft, Christoffer, and Breum, Leif
- Abstract
Objective: To assess the effect of 3 insulin analogue regimens on change in carotid intima-media thickness (IMT) in patients with type 2 diabetes. Design and setting: Investigator-initiated, randomised, placebo-controlled trial with a 2x3 factorial design, conducted at 8 hospitals in Denmark. Participants and interventions: Participants with type 2 diabetes (glycated haemoglobin (HbA
1c )≥7.5% (≥58 mmol/mol), body mass index >25 kg/m²) were, in addition to metformin versus placebo, randomised to 18 months open-label biphasic insulin aspart 1-3 times daily (n=137) versus insulin aspart 3 times daily in combination with insulin detemironce daily (n=138) versus insulin detemir alone once daily (n=137), aiming at HbA1c ≤7.0% (≤53 mmol/mol). Outcomes: Primary outcome was change in mean carotid IMT (a marker of subclinical cardiovascular disease). HbA1c , insulin dose, weight, and hypoglycaemic and serious adverse events were other prespecified outcomes. Results: Carotid IMT change did not differ between groups (biphasic -0.009 mm (95% CI -0.022 to 0.004), aspart+detemir 0.000 mm (95% CI -0.013 to 0.013), detemir -0.012 mm (95% CI -0.025 to 0.000)). HbA1c was more reduced with biphasic (1.0% (95% CI -1.2 to -0.8)) compared with the aspart +detemir (-0.4% (95% CI -0.6 to -0.3)) and detemir (-0.3% (95% CI -0.4 to -0.1)) groups (p<0.001). Weight gain was higher in the biphasic (3.3 kg (95% CI 2.7 to 4.0) and aspart+detemir (3.2 kg (95% CI 2.6 to 3.9)) compared with the detemir group (1.9 kg (95% CI 1.3 to 2.6)). Insulin dose was higher with detemir (1.6 IU/kg/day (95% CI 1.4 to 1.8)) compared with biphasic (1.0 IU/kg/day (95% CI 0.9 to 1.1)) and aspart +detemir (1.1 IU/kg/day (95% CI 1.0 to 1.3)) (p<0.001). Number of participants with severe hypoglycaemia and serious adverse events did not differ. Conclusions: Carotid IMT change did not differ between 3 insulin regimens despite differences in HbA1c , weight gain and insulin doses. The trial only reached 46% of planned sample size and lack of power may therefore have affected our results. [ABSTRACT FROM AUTHOR]- Published
- 2016
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9. Metformin versus placebo in combination with insulin analogues in patients with type 2 diabetes mellitus--the randomised, blinded Copenhagen Insulin and Metformin Therapy (CIMT) trial.
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Lundby-Christensen, Louise, Tarnow, Lise, Boesgaard, Trine W., Lund, Søren S., Wiinberg, Niels, Perrild, Hans, Krarup, Thure, Snorgaard, Ole, Gade-Rasmussen, Birthe, Thorsteinsson, Birger, Røder, Michael, Mathiesen, Elisabeth R., Jensen, Tonny, Vestergaard, Henrik, Hedetoft, Christoffer, Breum, Leif, Duun, Elsebeth, Sneppen, Simone B., Pedersen, Oluf, and Hemmingsen, Bianca
- Abstract
Objective: To assess the effect of metformin versus placebo both in combination with insulin analogue treatment on changes in carotid intima-media thickness (IMT) in patients with type 2 diabetes. Design and setting: Investigator-initiated, randomised, placebo-controlled trial with a 2x3 factorial design conducted at eight hospitals in Denmark. Participants and interventions: 412 participants with type 2 diabetes (glycated haemoglobin (HbA
1c ) ≥7.5% (≥58 mmol/mol); body mass index >25 kg/m2) were in addition to open-labelled insulin treatment randomly assigned 1:1 to 18 months blinded metformin (1 g twice daily) versus placebo, aiming at an HbA1c ≤7.0% (≤53 mmol/mol). Outcomes: The primary outcome was change in the mean carotid IMT (a marker of subclinical cardiovascular disease). HbA1c , insulin dose, weight and hypoglycaemic and serious adverse events were other prespecified outcomes. Results: Change in the mean carotid IMT did not differ significantly between the groups (between-group difference 0.012 mm (95% CI -0.003 to 0.026), p=0.11). HbA1c was more reduced in the metformin group (between-group difference -0.42% (95% CI -0.62% to -0.23%), p<0.001)), despite the significantly lower insulin dose at end of trial in the metformin group (1.04 IU/kg (95% CI 0.94 to 1.15)) compared with placebo (1.36 IU/kg (95% CI 1.23 to 1.51), p<0.001). The metformin group gained less weight (between-group difference -2.6 kg (95% CI -3.3 to -1.8), p<0.001). The groups did not differ with regard to number of patients with severe or non-severe hypoglycaemic or other serious adverse events, but the metformin group had more nonsevere hypoglycaemic episodes (4347 vs 3161, p<0.001). Conclusions: Metformin in combination with insulin did not reduce carotid IMT despite larger reduction in HbA1c , less weight gain, and smaller insulin dose compared with placebo plus insulin. However, the trial only reached 46% of the planned sample size and lack of power may therefore have affected our results. [ABSTRACT FROM AUTHOR]- Published
- 2016
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10. Additive prognostic value of plasma N-terminal pro-brain natriuretic peptide and coronary artery calcification for cardiovascular events and mortality in asymptomatic patients with type 2 diabetes.
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von Scholten, Bernt Johan, Reinhard, Henrik, Hansen, Tine Willum, Lindhardt, Morten, Petersen, Claus Leth, Wiinberg, Niels, Hansen, Peter Riis, Parving, Hans-Henrik, Jacobsen, Peter Karl, and Rossing, Peter
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NATRIURETIC peptides ,CORONARY arteries ,CALCIFICATION ,CARDIOVASCULAR diseases ,TYPE 2 diabetes - Abstract
Background: In patients with type 2 diabetes, cardiovascular disease (CVD) is the major cause of morbidity and mortality. We evaluated the combination of NT-proBNP and coronary artery calcium score (CAC) for prediction of combined fatal and non-fatal CVD and mortality in patients with type 2 diabetes and microalbuminuria (>30 mg/24-h), but without known coronary artery disease. Moreover, we assessed the predictive value of a predefined categorisation of patients into a high- and low-risk group at baseline. Methods: Prospective study including 200 patients. All received intensive multifactorial treatment. Patients with baseline NT-proBNP >45.2 ng/L and/or CAC ≥400 were stratified as high-risk patients (n = 133). Occurrence of fatal- and nonfatal CVD (n =40) and mortality (n = 26), was traced after 6.1 years (median). Results: High-risk patients had a higher risk of the composite CVD endpoint (adjusted hazard ratio [HR] 10.6 (95 % confidence interval [CI] 2.4-46.3); p = 0.002) and mortality (adjusted HR 5.3 (95 % CI 1.2-24.0); p = 0.032) compared to low-risk patients. In adjusted continuous analysis, both higher NT-proBNP and CAC were strong predictors of the composite CVD endpoint and mortality (p ≤ 0.0001). In fully adjusted models mutually including NT-proBNP and CAC, both risk factors remained associated with risk of CVD and mortality (p ≤ 0.022). There was no interaction between NT-proBNP and CAC for the examined endpoints (p ≥ 0.31). Conclusions: In patients with type 2 diabetes and microalbuminuria but without known coronary artery disease, NT-proBNP and CAC were strongly associated with fatal and nonfatal CVD, as well as with mortality. Their additive prognostic capability holds promise for identification of patients at high risk. [ABSTRACT FROM AUTHOR]
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- 2015
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11. Higher Physical Activity Is Associated With Lower Aortic Stiffness but Not With Central Blood Pressure: The ADDITION-Pro Study.
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Laursen, Anne Sofie Dam, Hansen, Anne-Louise Smidt, Wiinberg, Niels, Brage, Søren, Sandbæk, Annelli, Lauritzen, Torsten, Witte, Daniel R., Jørgensen, Marit Eika, and Johansen, Nanna Borup
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- 2015
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12. Measuring systolic ankle and toe pressure using the strain gauge technique - a comparison study between mercury and indium-gallium strain gauges.
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Broholm, Rikke, Wiinberg, Niels, and Simonsen, Lene
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PLETHYSMOGRAPHY ,STRAIN gages ,DISEASES of the anatomical extremities ,INTERMITTENT claudication ,ANKLE diseases ,TOE diseases - Abstract
Background. Measurement of the ankle and toe pressures are often performed using a plethysmograph, compression cuffs and a strain gauge. Usually, the strain gauge contains mercury but other alternatives exist. From 2014, the mercury-containing strain gauge will no longer be available in the European Union. The aim of this study was to compare an indium-gallium strain gauge to the established mercury-containing strain gauge. Methods. Consecutive patients referred to the Department of Clinical Physiology and Nuclear Medicine at Bispebjerg and Frederiksberg Hospitals for measurements of systolic ankle and toe pressures volunteered for the study. Ankle and toe pressures were measured twice with the mercury and the indium-gallium strain gauge in random order. Comparison of the correlation between the mean pressure using the mercury and the indium-gallium device and the difference between the two devices was performed for both toe and ankle level. Results. A total of 53 patients were included (36 male). Mean age was 69 (range, 45-92 years). Mean pressures at toe and ankle level with the mercury and the indium-gallium strain gauges were 77 (range, 0-180) mm Hg and 113 (range, 15-190) mm Hg, respectively. Comparison between the mercury and the indium-gallium strain gauge showed a difference in toe blood pressure values of − 0.7 mm Hg (SD: 7.0). At the ankle level, a difference of 2.0 mm Hg (SD: 8.6) was found. Conclusion. The two different devices agree sufficiently in the measurements of systolic ankle and toe pressure for the indium-gallium strain gauge to replace the mercury strain gauge. [ABSTRACT FROM AUTHOR]
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- 2014
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13. Increased prevalence of coronary artery disease risk markers in patients with chronic hepatitis C--a cross-sectional study.
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Roed, Torsten, Kristoffersen, Ulrik Sloth, Knudsen, Andreas, Wiinberg, Niels, Lebech, Anne-Mette, Almdal, Thomas, Thomsen, Reimar W, Kjær, Andreas, and Weis, Nina
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Objective: Chronic hepatitis C is a global health problem and has been associated with coronary artery disease. Our aim was to examine the prevalence of coronary artery disease risk markers including endothelial biomarkers in patients with chronic hepatitis C and matched comparisons without manifest cardiovascular disease or diabetes in a cross-sectional design.Methods: Sixty patients with chronic hepatitis C (mean age 51 years) were recruited from the Department of Infectious Diseases at Copenhagen University Hospital, and compared with 60 age-matched non-hepatitis C virus-infected individuals from a general population survey. We examined traditional coronary artery disease risk factors, metabolic syndrome, carotid intima media thickness, and a range of endothelial biomarkers.Results: Patients with chronic hepatitis C had more hypertension (40% versus 25%, prevalence ratio [PR] 1.6; 95% confidence interval [CI] 0.9-2.7) and smoked more (53% versus 38%, PR 1.4; 95% CI 0.9-2.1). The two groups had similar body mass index (mean 25.0 versus 25.7 kg/m(2)), whereas those with chronic hepatitis C had less dyslipidemia (including significantly lower low-density lipoprotein and cholesterol/high-density lipoprotein ratio), higher glycosylated hemoglobin level (mean 6.2 versus 5.7, difference of means 0.5; 95% CI 0.3-0.8), and a higher prevalence of metabolic syndrome (28% versus 18%, PR 1.6; 95% CI 0.8-3.0). Increased carotid intima media thickness above the standard 75th percentile was seen more frequently in chronic hepatitis C (9% versus 3%, PR 1.7; 95% CI 0.4-6.7), though difference of means was only 0.04 mm (95% CI 0.00-0.10). Patients with chronic hepatitis C had increased hsCRP (high-sensitivity C-reactive protein), sICAM-1 (soluble intercellular adhesion molecule-1), sVCAM-1 (soluble vascular cell adhesion molecule-1), and soluble E-selectin, but lower levels of tPAI-1 (tissue-type plasminogen activator inhibitor-1), MMP9 (matrix metallopeptidase 9), and MPO (myeloperoxidase) than their comparisons.Conclusion: Our findings indicate that patients with chronic hepatitis C have increased prevalence of several coronary artery disease risk markers. These results may be important when evaluating the appropriateness of screening for coronary artery disease and its risk factors in chronic hepatitis C. [ABSTRACT FROM AUTHOR]- Published
- 2014
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14. Interarm Difference in Blood Pressure: Reproducibility and Association with Peripheral Vascular Disease.
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Mehlsen, Jesper and Wiinberg, Niels
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The present study aimed at examining the interarm difference in blood pressure and its use as an indicator of peripheral arterial disease (PAD). Data were included from consecutive patients referred from their general practitioner to our vascular laboratory for possible PAD aged 50 years or older without known cardiac disease, renal disease, or diabetes mellitus. 824 patients (453 women) with mean age of 72 years (range: 50-101) were included. 491 patients had a diagnosis of hypertension and peripheral arterial disease (PAD) was present in 386 patients. Systolic blood pressure was 143 ± 24 mmHg and 142 ± 24 mmHg on the right and left arm, respectively (P = 0.015). The interarm difference was greater in patients with hypertension (P = 0.002) and PAD (P < 0.0005). 443 patients were measured on two separate occasions and the interarm difference for systolic blood pressure was reproducible for differences >20 mmHg. This study confirmed the presence of a systematic but clinically insignificant difference in systolic blood pressure between arms. The interarm difference was larger in hypertension and PAD. Consistent lateralisation is present for differences >20 mmHg and an interarm difference >25 mmHg is a reliable indicator of PAD in the legs. [ABSTRACT FROM AUTHOR]
- Published
- 2014
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15. Increased prevalence of coronary artery disease risk markers in patients with chronic hepatitis C - a cross-sectional study.
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Roed, Torsten, Sloth Kristoffersen, Ulrik, Knudsen, Andreas, Wiinberg, Niels, Lebech, Anne-Mette, Almdal, Thomas, Thomsen, Reimar W., Kjær, Andreas, and Weis, Nina
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DISEASE prevalence ,CORONARY heart disease risk factors ,HEPATITIS C ,BIOMARKERS ,EPIDEMIOLOGY - Abstract
Objective: Chronic hepatitis C is a global health problem and has been associated with coronary artery disease. Our aim was to examine the prevalence of coronary artery disease risk markers including endothelial biomarkers in patients with chronic hepatitis C and matched comparisons without manifest cardiovascular disease or diabetes in a cross-sectional design. Methods: Sixty patients with chronic hepatitis C (mean age 51 years) were recruited from the Department of Infectious Diseases at Copenhagen University Hospital, and compared with 60 age-matched non-hepatitis C virus-infected individuals from a general population survey. We examined traditional coronary artery disease risk factors, metabolic syndrome, carotid intima media thickness, and a range of endothelial biomarkers. Results: Patients with chronic hepatitis C had more hypertension (40% versus 25%, prevalence ratio [PR] 1.6; 95% confidence interval [CI] 0.9-2.7) and smoked more (53% versus 38%, PR 1.4; 95% CI 0.9-2.1). The two groups had similar body mass index (mean 25.0 versus 25.7 kg/m
2 ), whereas those with chronic hepatitis C had less dyslipidemia (including significantly lower low-density lipoprotein and cholesterol/high-density lipoprotein ratio), higher glycosylated hemoglobin level (mean 6.2 versus 5.7, difference of means 0.5; 95% CI 0.3-0.8), and a higher prevalence of metabolic syndrome (28% versus 18%, PR 1.6; 95% CI 0.8-3.0). Increased carotid intima media thickness above the standard 75th percentile was seen more frequently in chronic hepatitis C (9% versus 3%, PR 1.7; 95% CI 0.4-6.7), though difference of means was only 0.04 mm (95% CI 0.00-0.10). Patients with chronic hepatitis C had increased hsCRP (high-sensitivity C-reactive protein), sICAM-1 (soluble intercellular adhesion molecule-1), sVCAM-1 (soluble vascular cell adhesion molecule-1), and soluble E-selectin, but lower levels of tPAI-1 (tissue-type plasminogen activator inhibitor-1), MMP9 (matrix metallopeptidase 9), and MPO (myeloperoxidase) than their comparisons. Conclusion: Our findings indicate that patients with chronic hepatitis C have increased prevalence of several coronary artery disease risk markers. These results may be important when evaluating the appropriateness of screening for coronary artery disease and its risk factors in chronic hepatitis C. [ABSTRACT FROM AUTHOR]- Published
- 2014
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16. Silent Ischemic Heart Disease and Pericardial Fat Volume in HIV-Infected Patients: A Case-Control Myocardial Perfusion Scintigraphy Study.
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Kristoffersen, Ulrik S., Lebech, Anne-Mette, Wiinberg, Niels, Petersen, Claus L., Hasbak, Philip, Gutte, Henrik, Jensen, Gorm B., Hag, Anne Mette F., Ripa, Rasmus S., and Kjaer, Andreas
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SILENT myocardial ischemia ,CORONARY disease ,PERICARDIUM ,FAT ,HIV-positive persons ,CASE-control method ,MYOCARDIAL perfusion imaging - Abstract
Objectives: to determine the prevalence of asymptomatic ischemic heart disease (IHD) in HIV patients by myocardial perfusion scintigraphy (MPS) and to determine the value of coronary artery calcium score (CACS), carotid intima-media thickness (cIMT) and pericardial fat volume as screening tools for detection of IHD in subjects with HIV. Background: Patients with HIV seem prone to early development of IHD. Methods: 105 consecutive HIV patients (mean age 47.4 years; mean duration of HIV 12.3 years; mean CD4+ cell count 636×10
6 /L; all receiving antiretroviral therapy) and 105 controls matched for age, gender and smoking status, without history of IHD were recruited. MPS, CACS, cIMT, pericardial fat volume, and cardiovascular risk scores were measured. Results: HIV patients demonstrated higher prevalence of perfusion defects than controls (18% vs. 0%; p<0.001) despite similar risk scores. Of HIV patients with perfusion defects, 42% had a CACS = 0. CACS and cIMT were similar in HIV patients and controls. HIV patients on average had 35% increased pericardial fat volume and increased concentration of biomarkers of atherosclerosis in the blood. HIV patients with myocardial perfusion defects had increased pericardial fat volume compared with HIV patients without perfusion defects (314±43 vs. 189±12 mL; p<0.001). Conclusions: HIV patients had an increased prevalence of silent IHD compared to controls as demonstrated by MPS. The finding was strongly associated with pericardial fat volume, whereas cardiovascular risk scores, cIMT and CACS seem less useful as screening tools for detection of myocardial perfusion defects in HIV patients. [ABSTRACT FROM AUTHOR]- Published
- 2013
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17. Effect of intensive multifactorial treatment compared with routine care on aortic stiffness and central blood pressure among individuals with screen-detected type 2 diabetes: the ADDITION-Denmark study.
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Johansen NB, Charles M, Vistisen D, Rasmussen SS, Wiinberg N, Borch-Johnsen K, Lauritzen T, Sandbæk A, Witte DR, Johansen, Nanna B, Charles, Morten, Vistisen, Dorte, Rasmussen, Signe S, Wiinberg, Niels, Borch-Johnsen, Knut, Lauritzen, Torsten, Sandbæk, Annelli, and Witte, Daniel R
- Abstract
Objective: Diabetes is associated with increased brachial and central blood pressure and aortic stiffness. We examined the effect of intensive multifactorial treatment in general practice on indices of peripheral and central hemodynamics among patients with screen-detected diabetes.Research Design and Methods: As part of a population-based screening and intervention study in general practice, 1,533 Danes aged 40-69 years were clinically diagnosed with screen-detected diabetes. General practitioners were randomized to provide intensive multifactorial treatment or routine care. After a mean follow-up of 6.2 years, an unselected subsample of 456 patients underwent central hemodynamic assessments by applanation tonometry. Central pressure was derived from the radial pulse wave. Aortic stiffness was assessed as carotid-femoral pulse wave velocity (aPWV). The intervention effect on each index of central hemodynamics was analyzed by mixed-effects models adjusted for heart rate, cluster randomization, age, and sex.Results: At screening, median age was 59.2 years (interquartile range 55.2-64.6); 289 patients (63%) were in the intensive treatment group, and 278 patients (61%) were men. Patients in the intensive treatment group had a 0.51 m/s (95% CI -0.96 to -0.05, P = 0.03) lower aPWV compared with routine care. Respective differences for central augmentation index (-0.84% [-2.54 to 0.86]), pulse pressure (0.28 mmHg [-1.75 to 2.32]), and systolic (-1.42 mmHg [-4.47 to 1.64]) and diastolic (-1.79 mmHg [-3.72 to 0.14]) blood pressure were not statistically significant.Conclusions: Intensive multifactorial treatment of screen-detected diabetes during 6 years in general practice has a significant impact on aortic stiffness, whereas the effects on other hemodynamic measures are smaller and not statistically significant. [ABSTRACT FROM AUTHOR]- Published
- 2012
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18. Effect of Intensive Multifactorial Treatment Compared With Routine Care on Aortic Stiffness and Central Blood Pressure Among Individuals With Screen-Detected Type 2 Diabetes.
- Author
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JOHANSEN, NANNA B., CHARLES, MORTEN, VISTISEN, DORTE, RASMUSSEN, SIGNE S., WIINBERG, NIELS, BORCH.-JOHNSEN, KNUT, LAURITZEN, TORSTEN, SANDBÆK, ANNELLI, and WITTE, DANIEL R.
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DIABETES ,BLOOD pressure measurement ,AORTIC diseases ,HEMODYNAMICS ,TYPE 2 diabetes - Abstract
OBJECTIVE--Diabetes is associated with increased brachial and central blood pressure and aortic stiffness. We examined the effect of intensive multifactorial treatment in general practice on indices of peripheral and central hemodynamics among patients with screen-detected diabetes. RESEARCH DESIGN AND METHODS--As part of a population-based screening and intervention study in general practice, 1,533 Danes aged 40-69 years were clinically diagnosed with screen-detected diabetes. General practitioners were randomized to provide intensive multifactorial treatment or routine care. After a mean follow-up of 6.2 years, an unselected subsample of 456 patients underwent central hemodynamic assessments by applanation tonometry. Central pressure was derived from the radial pulse wave. Aortic stiffness was assessed as carotid-femoral pulse wave velocity (aPWV). The intervention effect on each index of central hemodynamics was analyzed by mixed-effects models adjusted for heart rate, cluster randomization, age, and sex. RESULTS--At screening, median age was 59.2 years (interquartile range 55.2-64.6); 289 patients (63%) were in the intensive treatment group, and 278 patients (61%) were men. Patients in the intensive treatment group had a 0.51 m/s (95%CI -0.96 to -0.05, P = 0.03) lower aPWV compared with routine care. Respective differences for central augmentation index (20.84% [-2.54 to 0.86]), pulse pressure (0.28 mmHg [-1.75 to 2.32]), and systolic (-1.42 mmHg [-4.47 to 1.64]) and diastolic (-1.79 mmHg [-3.72 to 0.14]) blood pressure were not statistically significant. CONCLUSIONS--Intensive multifactorial treatment of screen-detected diabetes during 6 years in general practice has a significant impact on aortic stiffness, whereas the effects on other hemodynamic measures are smaller and not statistically significant. [ABSTRACT FROM AUTHOR]
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- 2012
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19. Vitamin D levels and asymptomatic coronary artery disease in type 2 diabetic patients with elevated urinary albumin excretion rate.
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Joergensen C, Reinhard H, Schmedes A, Hansen PR, Wiinberg N, Petersen CL, Winther K, Parving HH, Jacobsen PK, Rossing P, Joergensen, Christel, Reinhard, Henrik, Schmedes, Anne, Hansen, Peter R, Wiinberg, Niels, Petersen, Claus L, Winther, Kaj, Parving, Hans-Henrik, Jacobsen, Peter K, and Rossing, Peter
- Abstract
Objective: Coronary artery disease (CAD) is the major cause of morbidity and mortality in type 2 diabetic patients. Severe vitamin D deficiency has been shown to predict cardiovascular mortality in type 2 diabetic patients.Research Design and Methods: We investigated the association among severe vitamin D deficiency, coronary calcium score (CCS), and asymptomatic CAD in type 2 diabetic patients with elevated urinary albumin excretion rate (UAER) >30 mg/24 h. This was a cross-sectional study including 200 type 2 diabetic patients without a history of CAD. Severe vitamin D deficiency was defined as plasma 25-hydroxyvitamin D (p-25[OH]D3) <12.5 nmol/L. Patients with plasma N-terminal pro-brain natriuretic peptide >45.2 ng/L or CCS ≥400 were stratified as being high risk for CAD (n= 133). High-risk patients were examined by myocardial perfusion imaging (MPI; n = 109), computed tomography angiography (n = 20), or coronary angiography (CAG; n = 86). Patients' p-25(OH)D3 levels were determined by high-performance liquid chromatography/tandem mass spectrometry.Results: The median (range) vitamin D level was 36.9 (3.8-118.6) nmol/L. The prevalence of severe vitamin D deficiency was 9.5% (19/200). MPI or CAG demonstrated significant CAD in 70 patients (35%). The prevalence of CCS ≥400 was 34% (68/200). Severe vitamin D deficiency was associated with CCS ≥400 (odds ratio [OR] 4.3, 95% CI [1.5-12.1], P = 0.005). This association persisted after adjusting for risk factors (4.6, 1.5-13.9, P = 0.007). Furthermore, severe vitamin D deficiency was associated with asymptomatic CAD (adjusted OR 2.9, 1.02-7.66, P = 0.047).Conclusions: In high-risk type 2 diabetic patients with elevated UAER, low levels of vitamin D are associated with asymptomatic CAD. [ABSTRACT FROM AUTHOR]- Published
- 2012
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20. Vitamin D Levels and Asymptomatic Coronary Artery Disease in Type 2 Diabetic Patients With Elevated Urinary Albumin Excretion Rate.
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Joergensen, Christel, Reinhard, Henrik, Schmedes, Anne, Hansen, Peter R., Wiinberg, Niels, Petersen, Claus L., Winther, Kaj, Parving, Hans-Henrik, Jacobsen, Peter K., and Rossing, Peter
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HEART diseases ,CARDIOVASCULAR diseases ,PEOPLE with diabetes ,DIABETES ,VITAMIN D deficiency - Abstract
OBJECTIVE--Coronary artery disease (CAD) is the major cause of morbidity and mortality in type 2 diabetic patients. Severe vitamin D deficiency has been shown to predict cardiovascular mortality in type 2 diabetic patients. RESEARCH DESIGN AND METHODS--We investigated the association among severe vitamin D deficiency, coronary calcium score (CCS), and asymptomatic CAD in type 2 diabetic patients with elevated urinary albumin excretion rate (UAER) >30 mg/24 h. This was a cross-sectional study including 200 type 2 diabetic patients without a history of CAD. Severe vitamin D deficiency was defined as plasma 25-hydroxyvitamin D (p-25[OH]D3) <12.5 nmol/L. Patients with plasma N-terminal pro-brain natriuretic peptide >45.2 ng/L or CCS≥400 were stratified as being high risk for CAD (n = 133). High-risk patients were examined by myocardial perfusion imaging (MPI; n = 109), computed tomography angiography (n = 20), or coronary angiography (CAG; n = 86). Patients' p-25(OH)D3 levels were determined by high-performance liquid chromatography/tandem mass spectrometry. RESULTS--The median (range) vitamin D level was 36.9 (3.8-118.6) nmol/L. The prevalence of severe vitamin D deficiency was 9.5% (19/200).MPI or CAG demonstrated significant CAD in 70 patients (35%). The prevalence of CCS ≥400 was 34% (68/200). Severe vitamin D deficiency was associated with CCS ≥400 (odds ratio [OR] 4.3, 95% CI [1.5-12.1], P = 0.005). This association persisted after adjusting for risk factors (4.6, 1.5-13.9, P = 0.007). Furthermore, severe vitamin D deficiency was associated with asymptomatic CAD (adjusted OR 2.9, 1.02-7.66, P = 0.047). CONCLUSIONS--In high-risk type 2 diabetic patients with elevated UAER, low levels of vitamin D are associated with asymptomatic CAD. [ABSTRACT FROM AUTHOR]
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- 2012
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21. Elevated NT-proBNP and coronary calcium score in relation to coronary artery disease in asymptomatic type 2 diabetic patients with elevated urinary albumin excretion rate.
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Reinhard, Henrik, Hansen, Peter R., Persson, Frederik, Tarnow, Lise, Wiinberg, Niels, Kjær, Andreas, Petersen, Claus L., Winther, Kaj, Parving, Hans-Henrik, Rossing, Peter, and Jacobsen, Peter K.
- Abstract
Background: Elevated plasma N-terminal (NT)-proBNP levels and coronary calcium score (CCS) not only predicts myocardial ischaemia and coronary artery stenosis but also adverse cardiovascular events and mortality in type 2 diabetic patients with an increased urinary albumin excretion rate (UAER), whereas low levels are associated with low frequency of coronary artery disease (CAD) and good prognosis. The underlying causes of poor prognosis in patients with elevated NT-proBNP are not known; thus, we investigated the role of putative asymptomatic CAD in type 2 diabetic patients with UAER >30 mg/24 h and elevated P-NT-proBNP and/or CCS. Methods: We identified 200 type 2 diabetic patients without known CAD and with normal creatinine levels. Patients with P-NT-proBNP >45.2 ng/L (the median P-NT-proBNP value in this cohort and in accordance with our previous findings) and/or CCS ≥ 400 were stratified as high-risk patients for CAD (n = 133) and all other patients as low-risk patients (n = 67). High-risk patients were examined by myocardial perfusion imaging (MPI; n = 109) and/or computer tomography angiography (n = 20) and/or coronary angiography (CAG; n = 86). Results: All patients received intensive mulitifactorial intervention. In 70 of 133 (53%) high-risk patients, significant CAD was demonstrated by MPI and/or CAG, corresponding to 35% (70/200) of the total cohort. Among high-risk patients, CCS but not P-NT-proBNP was paralleled by increased prevalence of significant CAD and in the 86 patients where CAG was performed, a CCS <100 had a negative predictive value for coronary artery stenosis of 94% (P = 0.04). Conclusions: Our study revealed that >50% of asymptomatic type 2 diabetic patients with UAER >30 mg/24 h had significant CAD based on risk stratification with P-NT-proBNP and CCS. This provides some explanation to the previously reported poor prognosis in these asymptomatic patients. Optimized cardio protective treatment in these patients is warranted. [ABSTRACT FROM AUTHOR]
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- 2011
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22. Reduction in coronary and peripheral vasomotor function in patients with HIV after initiation of antiretroviral therapy: a longitudinal study with positron emission tomography and flow-mediated dilation.
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Kristoffersen, Ulrik Sloth, Wiinberg, Niels, Petersen, Claus Leth, Gerstoft, Jan, Gutte, Henrik, Lebech, Anne-Mette, and Kjaer, Andreas
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- 2010
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23. High prevalence of peripheral arterial disease in patients with previous cerebrovascular or coronary event.
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Mehlsen, Jesper, Wiinberg, Niels, Joergensen, Bjarne S., and Schultz-Larsen, Peter
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CEREBROVASCULAR disease ,CORONARY disease ,BLOOD pressure ,ANKLE brachial index ,PEOPLE with diabetes ,MYOCARDIAL infarction ,CEREBRAL ischemia - Abstract
Aim. The presence of peripheral arterial disease (PAD) in patients with other manifestations of cardiovascular disease identifies a population at increased risk of complications both during acute coronary events and on a long-term basis and possibly a population in whom secondary prevention of cardiovascular events should be addressed aggressively. The present study was aimed at providing a valid estimate on the prevalence of PAD in patients attending their general practitioner and having previously suffered a cardio- or cerebrovascular event. Patients and methods. 1000 patients with a previous cardiovascular event were screened and PAD was considered present when the ankle-brachial index (ABI) of systolic blood pressure was less than 0.90 using the current recommended technique. Results. 965 (659 men) patients met the inclusion criteria and had detectable systolic blood pressures on the arms and ankles. Mean age was 70±8 years, 77% were current or previous smokers, and 188 patients were diabetics. The medical history included stroke in 392, transitory ischemic attacks in 77, acute coronary syndrome in 298, and ST-elevation myocardial infarction in 253. Brachial systolic and diastolic blood pressures were 139±18 mmHg and 79±12 mmHg, respectively. Total and LDL-cholesterols were 4.5±1.0 mmol/l and 2.4±0.8 mmol/l, respectively. 625 patients were without PAD, 322 had mild to moderate PAD and 18 had severe PAD. The overall prevalence of PAD was 35.3%. Conclusion. In patients with previous coronary or cerebrovascular events, PAD occurs with a much higher prevalence than previously estimated. It is suggested that screening for PAD is justified and that it should be carried out in these patients in order to regulate the possible lifestyle and medical intervention. [ABSTRACT FROM AUTHOR]
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- 2010
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24. Carotid intima-media thickness in individuals withand without type 2 diabetes: a reproducibilitystudy.
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Lundby-Christensen, Louise, Almdal, Thomas P., Carstensen, Bendix, Tarnow, Lise, and Wiinberg, Niels
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TYPE 2 diabetes ,ULTRASONIC imaging ,ACOUSTIC imaging ,ULTRASONICS ,DIAGNOSTIC ultrasonic imaging ,DUPLEX ultrasonography - Abstract
Background: The use of carotid intima-media thickness (carotid IMT) as a surrogate marker of cardiovascular disease is increasing and the method has now also been applied in several trials investigating patients with type 2 diabetes (T2D). Even though knowledge about methodology is of highest importance in order to make accurate power calculations and analyses of results, no reproducibility studies have been performed in this group of patients. The aim of this study was to quantify the variability of the measurement of carotid IMT in individuals with and without T2D. Methods: We used B-mode ultrasound and a computerized software programme (MIA vascular tools) for analysis of carotid IMT. Measurement of carotid IMT in the far wall of the common carotid artery (CCA) was done for 30 patients with T2D and 30 persons without T2D. The examinations were done by two different sonographers and two different readers on two separate days in order to quantify sonographer-, reader-, and day-to-day variability. Results: Comparisons of measurement of carotid IMT in CCA between sonographers (sonographer variability) resulted in limits of agreement (LoA) from -0.18 to 0.13 mm for patients with T2D and -0.12 to 0.10 mm for persons without T2D. This means, that a second scanning of the same person with 95% probability would be within this interval of the first scanning. Comparisons between readers assessing the same scanning (reader variability) resulted in LoA from -0.05 to 0.07 mm and -0.04 to 0.05 mm respectively. LoA of the day-to-day variability was -0.13 to 0.18 mm and -0.09 to 0.18 mm respectively. This corresponds to coefficients of variations (CV) of the sonographer- and day-to-day variability of 10% in patients with T2D and 8% in persons without T2D. The CV of the reader variability was 4% and 3% respectively. Conclusion: Measurement of carotid IMT in the CCA can be determined with good and comparable reproducibility in both patients with T2D and persons without T2D. These findings support the use of carotid IMT in clinical trials with T2D patients and suggest that the numbers of patients needed to detect a given difference will be the same whether the patients have T2D or not. [ABSTRACT FROM AUTHOR]
- Published
- 2010
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25. Oscillometric blood pressure measurement: a simple method in screening for peripheral arterial disease.
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Mehlsen, Jesper, Wiinberg, Niels, and Bruce, Christopher
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OSCILLATIONS ,BLOOD pressure measurement ,ATHEROSCLEROSIS ,CARDIAC contraction ,PLETHYSMOGRAPHY ,OSCILLOMETER - Abstract
Blood pressure at the ankle level is a reliable indicator of peripheral arterial disease (PAD) and the ankle brachial index (ABI) is a useful non-invasive screening tool for the early detection of atherosclerosis. In the first part of the study, systolic blood pressures obtained by oscillometry and plethysmography were compared in 80 subjects referred for possible vascular disease. In the second part of the study, 31 general practitioners enrolled 1258 consecutive patients aged more than 60 years. ABI was estimated by oscillometry. Patients with an ABI lower than 0·9 were referred to the local hospital for standardized measurements. In the first part, oscillometry showed a sensitivity of 97% and a specificity of 62% with a positive and negative predictive value of 71% and 96%, respectively. In the second part, significant PAD was found in 111 cases corresponding to a prevalence of 12·2%. In this population, the oscillometry showed a positive predictive value of 47%. The presence of PAD was significantly correlated to exercise related leg pain, a diagnosis of hypertension and smoking, whereas no correlation could be found with a diagnosis of heart disease, stroke, or with the presence of diabetes. The prevalence of PAD was sufficiently high in subjects over the age of 60 years to warrant screening. The ankle brachial index based on measurements with an oscillometric device was shown reliable in the exclusion of PAD, thereby fulfilling an important criterion for the use in screening. [ABSTRACT FROM AUTHOR]
- Published
- 2008
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26. Coronary and peripheral endothelial function in HIV patients studied with positron emission tomography and flow-mediated dilation: relation to hypercholesterolemia.
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Lebech, Anne-Mette, Kristoffersen, Ulrik, Wiinberg, Niels, Kofoed, Kristian, Andersen, Ove, Hesse, Birger, Petersen, Claus, Gerstoft, Jan, and Kjær, Andreas
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CORONARY arteries ,HYPERCHOLESTEREMIA ,HIV infections ,ANTIRETROVIRAL agents ,POSITRON emission tomography - Abstract
The mechanisms underlying increased cardiovascular risk in HIV patients in antiretroviral therapy (ART) are not known. Our aim was to study the endothelial function of the coronary arteries by cardiac perfusion positron emission tomography (PET), in HIV patients with normal or high cholesterol levels. Flow mediated dilation (FMD) of the brachial artery and circulating endothelial markers were also assessed. HIV patients in ART with total cholesterol ≤ 5.5 mmol/L (215 mg/dL; n = 13) or total cholesterol ≥ 6.5 mmol/L (254 mg/dL; n = 12) and healthy controls ( n = 14) were included.
13 NH3 perfusion PET, FMD, and measurement of plasma levels of E-Selectin, ICAM-1, VCAM-1, tPAI-1, and hs-CRP were performed. Baseline myocardial perfusion and the coronary flow reserve measured by PET (3.2 ± 0.3, 3.2 ± 0.3 and 3.0 ± 0.3; ns) was similar in HIV patients with normal or high total cholesterol and controls. FMD did not differ between the groups and was 4.6 ± 1.1%, 5.1 ± 1.2%, and 4.6 ± 0.8%, respectively. Increased levels of plasma E-Selectin, ICAM-1, tPAI-1, and hs-CRP were found in HIV patients when compared to controls ( p < 0.05). E-Selectin and ICAM-1 levels were higher in HIV patients receiving protease inhibitors (PI) compared to those not receiving PI ( p < 0.05). None of the measured endothelial biomarkers differed between the normal and high cholesterol HIV groups. In ART-treated HIV patients with a low overall cardiovascular risk, no sign of endothelial dysfunction was found not even in hypercholesterolemic patients. Also, the increased level of plasma endothelial markers found in HIV patients was not related to hypercholesterolemia. [ABSTRACT FROM AUTHOR]- Published
- 2008
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27. Losartan versus atenolol on 24-hour ambulatory blood pressure. A LIFE substudy.
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Bang, Lia E., Wiinberg, Niels, Wachtell, Kristian, Larsen, John, Olsen, Michael H., Tuxen, Christian, Hildebrandt, Per R., and Ibsen, Hans
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THERAPEUTICS ,HYPERTENSION ,ANTIHYPERTENSIVE agents ,BLOOD pressure ,MYOCARDIAL infarction ,MEDICAL research - Abstract
Objective. The Losartan Intervention For Endpoint reduction in hypertension (LIFE) study showed that losartan-based treatment reduced risk of the composite endpoint of cardiovascular death, stroke and myocardial infarction compared with atenolol-based treatment in patients with hypertension and left ventricular hypertrophy with similar office blood pressure (BP) reduction. Our aim was to investigate the effect of losartan- and atenolol-based treatment on 24-h ambulatory BP and heart rate (HR) in LIFE. Methods: In 110 patients, 24-h ambulatory BP and heart rate were recorded at baseline and 1 year after randomization. Results: Ambulatory BP was comparably reduced throughout the 24-h period after 1 year of losartan- vs atenolol-based antihypertensive treatment. Office and ambulatory BP were comparably reduced in the follow-up period. Early morning surge in BP was similar between groups. Non-dipping status was more frequent in the losartan group (p = 0.01). From baseline to Year 1 the 24-h HR profile for the losartan group was unchanged, but, as expected, there was a significant decrease in daytime HR in the atenolol group, which was not as large during early night-time. Conclusion: There were no differences in 24-h BP burden and HR that could explain the difference in outcome in favor of losartan vs atenolol in the LIFE study. [ABSTRACT FROM AUTHOR]
- Published
- 2007
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28. Autonomic dysfunction in HIV patients on antiretroviral therapy: studies of heart rate variability.
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Lebech, Anne-Mette, Kristoffersen, Ulrik Sloth, Mehlsen, Jesper, Wiinberg, Niels, Petersen, Claus Leth, Hesse, Birger, Gerstoft, Jan, and Kjaer, Andreas
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DYSAUTONOMIA ,HIV ,ANTIRETROVIRAL agents ,THERAPEUTICS ,MEDICAL care ,HEART beat ,PATIENTS ,PROGNOSIS - Abstract
Background: The presence of autonomic dysfunction in HIV patients is largely unknown. Early studies found autonomic dysfunction in patients with AIDS. Introduction of highly active antiretroviral combination therapy (ART) has dramatically changed the course of the disease and improved prognosis and decreased morbidity. At present it is not known whether introduction of ART also has decreased autonomic dysfunction. Aim: To evaluate whether autonomic dysfunction is present in an ART-treated HIV population. Methods: HIV patients receiving ART for at least 3 years ( n = 16) and an age-matched control group of healthy volunteers ( n = 12) were included. All were non-smokers, non-diabetic and had never received medication for dyslipidaemia or hypertension. Following a 10 min resting period a 5 min ECG recording was performed. Heart rate variability (HRV) analysis was performed in accordance with current guidelines and data reported as median (interquartile range). Results: The resting heart rate was higher in HIV patients compared with controls [69 (62–74) versus 57 (52–60); P<0·001]. Total HRV measured as standard deviation of normal-to-normal (SONN) was lower in the HIV group compared with the controls [36 (25–55) versus 74 (57–84) ms; P<0·01] as was parasympathetic activity measured as square root of the mean squared difference of successive normal-to-normal intervals (RMSSD) [22 (9–30) versus 35 (24–62) ms; P<0·05]. Low frequency power was lower in the HIV group compared with the control group [294 (161–602) versus 946 (711–1668) ms
2 ; P<0·01]. High frequency power as well as systolic and diastolic blood pressure did not differ between the groups. Conclusions: The HIV patients in ART have increased resting heart rate and decreased short-term heart rate variability indicating parasympathetic dysfunction. [ABSTRACT FROM AUTHOR]- Published
- 2007
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29. Carotid intima–media thickness in HIV patients treated with antiretroviral therapy.
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Lebech, Anne-Mette, Wiinberg, Niels, Kristoffersen, Ulrik Sloth, Hesse, Birger, Petersen, Claus Leth, Gerstoft, Jan, and Kjær, Andreas
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ANTIRETROVIRAL agents ,HIV-positive persons ,HIV infections ,ATHEROSCLEROSIS ,HYPERTENSION ,BLOOD cholesterol ,PROTEASE inhibitors - Abstract
Introduction: Increased cardiovascular risk in HIV patients in antiretroviral therapy (ART) may be due to HIV infection, direct effect of ART or dyslipidaemia induced by ART. Our aim was to study the relative importance of HIV, ART and dyslipidaemia on atherosclerosis, assessed by the comparison of carotid artery intima–media thickness (IMT) in non-smoking HIV patients with high or low serum cholesterol levels as well as in healthy volunteers. Methods : HIV patients in ART with normal cholesterol (≤5·5 mmol l
−1 ; n = 13) or high cholesterol (≥6·5 mmol l−1 ; n = 12) as well as healthy controls ( n = 14) were included. All were non-smokers and had never received medication for dyslipidaemia or hypertension. IMT was measured by ultrasonography. Results : In HIV patients with normal cholesterol (≤5·5 mmol l−1 ), in HIV patients with hypercholesterolaemia (≥6·5 mmol l−1 ) and in controls (5·1 ± 0·9 mmol l−1 ) IMT were 683 ± 119, 656 ± 99 and 657 ± 99 μm, respectively. Thus no difference in IMT was found between the three groups. IMT values did not differ between patients receiving and not receiving protease inhibitors (658 ± 117 μm versus 687 ± 97 μm, P>0·05). In HIV patients IMT correlated inversely with HDL cholesterol levels ( r = −0·50; P = 0·01), whereas no correlation was found with total cholesterol or LDL cholesterol. Conclusions : In non-smoking HIV patients receiving ART no sign of accelerated atherosclerosis was found as assessed by IMT even not in hypercholesterolaemic HIV patients. IMT correlated with HDL cholesterol but not with LDL cholesterol. Based on these observations, one could speculate whether selective lowering of LDL cholesterol will be successful in reducing cardiovascular risk in non-smoking HIV patients. [ABSTRACT FROM AUTHOR]- Published
- 2007
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30. Isolated systolic hypertension in an elderly Danish population. Prevalence and daytime ambulatory blood pressure.
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Talleruphuus, Ulrik, Bang, Lia Evi, Wiinberg, Niels, Mehlsen, Jesper, Svendsen, Tage Lysbo, and Bentzon, Michael Weis
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HYPERTENSION ,CARDIOVASCULAR system ,BLOOD pressure ,HEALTH risk assessment ,OUTPATIENT medical care - Abstract
Isolated systolic hypertension (ISH) is a major risk factor for cardiovascular complications. Nevertheless, data on the prevalence in a representative population do not seem to be available. The prevalence of ISH and the white coat effect was thus studied in a cross-sectional survey of 2806 inhabitants aged 70-80 years. In untreated subjects, the prevalence of ISH was 17.4% (95% CI 14.9-20.2) in women and 13.5% (95% CI 11.3-15.9) in men using clinic blood pressure at first visit. The prevalence increased significantly with age. The prevalence was reduced to 10.4% when using the average of all-visits clinic blood pressures. By a simulation model, it was demonstrated that his reduction mainly resulted from a regression towards the mean. Average all-visits clinic blood pressure was 172.6 ±10.4/81.1±6.0 mmHg. Less than one-third of those with all-visit ISH had sustained ISH. Identifying subjects with sustained ISH requires measurements in more than three visits. [ABSTRACT FROM AUTHOR]
- Published
- 2006
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31. Daily consumption for six weeks of a lignan complex isolated from flaxseed does not affect endothelial function in healthy postmenopausal women.
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Hallund, Jesper, Tetens, Inge, Bügel, Susanne, Tholstrup, Tine, Ferrari, Marika, Teerlink, Tom, Kjaer, Andreas, Wiinberg, Niels, and Bügel, Susanne
- Subjects
MENOPAUSE ,LIGNANS ,FLAXSEED ,ENDOTHELIUM ,ESTROGEN ,SEX hormones ,VASODILATION ,PLACEBOS ,NATURAL products - Abstract
The occurrence of menopause is associated with an increased risk of cardiovascular events, and this has partly been attributed to the decline in circulating levels of estrogen. A lignan complex rich in the plant lignan secoisolariciresinol diglucoside (SDG) was isolated from flaxseed. SDG is metabolized by the colonic microflora to the mammalian lignans enterodiol and enterolactone and is hypothesized to be cardioprotective due to their structural similarity to estrogen. The aim of this study was to investigate the effect of a lignan complex, providing 500 mg/d of SDG, on markers of endothelial function. Healthy postmenopausal women (n = 22) completed a randomized, double-blind, placebo-controlled, crossover study. Women consumed daily a low-fat muffin, with or without a lignan complex, for 6 wk, separated by a 6-wk washout period. Flow-mediated, endothelium-dependent vasodilatation (FMD) and nitroglycerine-mediated, endothelium-independent vasodilatation were measured at the end of each intervention period. The sum of Plasma nitrite and nitrate (NOx), endothelin-1 (ET-1), and asymmetric dimethylarginine (ADMA) were measured at the beginning and end of each intervention period. FMD was 3.6 +/- 0.9% (mean +/- SEM) after the lignan complex intervention period compared with 3.9 +/- 0.7% after the placebo period (P = 0.72). Plasma concentrations of NOx, ET-1, and ADMA were not affected. We conclude that daily consumption for 6 wk of a low-fat muffin enriched with a lignan complex had no effect on endothelial function in healthy postmenopausal women. [ABSTRACT FROM AUTHOR]
- Published
- 2006
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32. Does long-term losartan- vs atenolol-based antihypertensive treatment influence collagen markers differently in hypertensive patients? A LIFE substudy.
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Christensen, Marina K., Olsen, Michael H., Wachtell, Kristian, Tuxen, Christian, Fossum, Eigil, Bang, Lia E., Wiinberg, Niels, Devereux, Richard B., Kjeldsen, Sverre E., Hildebrandt, Per, Rokkedal, Jens, and Ibsen, Hans
- Abstract
Background. The aim of this study was to investigate the effect of losartan‐ vs atenolol‐based antihypertensive treatment on circulating collagen markers beyond the initial blood pressure (BP) reduction. Methods. In 204 patients with hypertension and left ventricular (LV) hypertrophy we measured serum concentration of carboxy‐terminal telopeptide of type I procollagen (ICTP), carboxy‐terminal propeptide of type I procollagen (PICP), amino‐terminal propeptide of type III procollagen (PIIINP), amino‐terminal propeptide of type I procollagen (PINP) and LV mass by echocardiography at baseline and annually during 4 years of losartan‐ or atenolol‐based antihypertensive treatment; 185 patients completed the study. Results. Beyond the first year of treatment systolic and diastolic BP, LV mass index (LVMI) as well as collagen markers did not change significantly and were equal in the two treatment groups. Changes in PICP during first year of treatment were related to subsequent changes in LV mass index after 2 and 3 years of treatment (r = 0.28 and r = 0.29, both p<0.05) in patients randomized to losartan, but not atenolol. Conclusion. Long‐term losartan‐ vs atenolol‐based antihypertensive treatment did not influence collagen markers differently, making a BP‐independent effect of losartan on collagen markers unlikely. However, initial reduction in circulating PICP may predict later regression of LV hypertrophy during losartan‐based antihypertensive treatment. [ABSTRACT FROM AUTHOR]
- Published
- 2006
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33. Diets rich in conjugated linoleic acid and vaccenic acid have no effect on blood pressure and isobaric arterial elasticity in healthy young men.
- Author
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Raff, Marianne, Tholstrup, Tine, Sejrsen, Kristen, Straarup, Ellen M., and Wiinberg, Niels
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BLOOD pressure ,LINOLEIC acid ,YOUNG adults ,BODY fluid pressure ,MILKFAT ,ESSENTIAL fatty acids ,UNSATURATED fatty acids ,CARBOXYLIC acids ,NUTRITION research ,ARTERIAL physiology ,ANIMAL experimentation ,CHOLESTEROL ,COMPARATIVE studies ,DIET ,ELASTICITY ,FATTY acids ,FAT content of food ,RESEARCH methodology ,MEDICAL cooperation ,MILK ,PHOSPHOLIPIDS ,RESEARCH ,TRIGLYCERIDES ,WEIGHT gain ,EVALUATION research ,RANDOMIZED controlled trials ,BLIND experiment - Abstract
The objective of this study was to examine the effect on blood pressure (BP) and isobaric arterial elasticity (AE), as a measure of arterial health, of a commercial mixture of conjugated linoleic acids (CLA) and of milk fat produced through livestock feeding to have a high content of vaccenic acid (VA). Healthy young men (n = 60) with a BMI of 22.5 +/- 2 kg/m2 (mean +/- SD) participated in this double-blind, randomized, 5-wk, parallel intervention study. The participants substituted 115 g of their daily fat intake with fat from 1 of 3 test diets: 1) CLA-diet rich in CLA (4.7 g/d of c9,t11- and t10,c12-CLA isomers in equal amounts); 2) VA-diet rich in VA (3.6 g/d); or 3) C-diet, a control diet with a low content of VA and CLA. All test diets were based on milk fat. BP and AE (measured by an oscillometric method) were measured before and after the intervention period. The effects of the test diets did not differ on any outcome variable: e.g., systolic- and diastolic blood pressure (SBP and DBP), pulse pressure (PP), isobaric arterial compliance (AC), distensibility (AD), or volume (AV). In conclusion, diets rich in milk fat and either CLA or VA have no effect on BP or AE indices in healthy young men compared with a control diet. [ABSTRACT FROM AUTHOR]
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- 2006
- Full Text
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34. N-terminal-pro-B-type natriuretic peptide (NT-pro-BNP) in different thyroid function states.
- Author
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Schultz, Marianne, Faber, Jens, Kistorp, Caroline, Jarløv, Anne, Pedersen, Frants, Wiinberg, Niels, and Hildebrandt, Per
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THYROID diseases ,PEPTIDES ,THYROID hormones ,ENDOCRINOLOGY ,HORMONES ,MEDICINE - Abstract
N-terminal B-type natriuretic peptide (NT-pro-BNP) is secreted from the cardiac ventricles in response to volume expansion and pressure overload, and serum levels are elevated in systolic heart failure. The aim of this study was to evaluate the influence of thyroid function on NT-pro-BNP. Patients with overt or subclinical thyroid disease were evaluated before and after treatment for their dysthyroid state. Seventeen overt and 21 subclinical hypothyroid patients together with six subclinical and 13 overt hyperthyroid patients without cardiac disease were included. Subclinical states had, by definition, free T4 and free T3 estimates within reference ranges. Serum levels of NT-pro-BNP and thyroid hormones were measured, and in 31 patients resting cardiac output was measured by impedance cardiography in the untreated state. NT-pro-BNP levels were more than four times higher in hyperthyroid than hypothyroid patients, with mean values of 30 and 7 pmol/l, respectively ( P < 0·001). Serum NT-pro-BNP levels correlated to the thyroid function ( vs. free T4 estimate: r = 0·52, P < 0·0001, n = 57). Treatment resulted in significant increases in NT-pro-BNP in both hypothyroid groups, and decreases in both hyperthyroid groups. A multiple linear regression analysis demonstrated that free T4 and free T3 ( P < 0·001) estimates were independently associated with a high serum NT-pro-BNP, whereas cardiac output and resting pulse rate were not. Serum NT-pro-BNP levels are affected by thyroid function. This seems due to a direct stimulatory effect of thyroid hormones. [ABSTRACT FROM AUTHOR]
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- 2004
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35. Measurement of Arm Blood Pressure Using Different Oscillometry Manometers Compared to Auscultatory Readings.
- Author
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SHAHRIARI, MAJID, ROTENBERG, DANIEL KAMINSKI, NIELSEN, JESPER KENT, WIINBERG, NIELS, and NIELSEN, POUL EBBE
- Subjects
BLOOD pressure ,OSCILLOMETER ,MANOMETERS ,AUSCULTATION - Abstract
Five different semiautomatic manometers were tested, where oscillometry is the measuring principle. Three of the manometers (Omron R4, A&D UB 322 and Braun) were wrist manometers, where the occluding cuff is placed around the volar surface of the wrist. Two of the manometers (A&D UA 777 and Omron M4) measure on the upper arm. The investigation included 72 patients with systolic blood pressure (SBP) ranging between 110 and 200, and diastolic blood pressure (DBP) between 62 and 114 mmHg. Forty-five of the subjects were on antihypertensive medication when the manometer tests were carried out. Each of the manometers was tested with double measurements of blood pressure against 2 × 2 auscultatory measurements done before and after the semiautomatic readings. The auscultatory measurements are all performed by the same observer, who was blinded for the measurements with semiautomatic manometers. The mean difference between the oscillometric recordings compared to auscultatory measurements varied from +1.2 to -8.5 mmHg for SBP and from -0.5 to -8.3 mmHg for DBP. However, the interindividual differences varied considerable with standard deviation of the difference varying from 8 to 18 mmHg for SBP with the highest values for wrist manometers. Concerning DBP, the standard deviation of difference for all five manometers was between 6 and 8 mmHg, with the highest values for wrist manometers. None of the tested manometers fulfilled the criteria for grading A or B in the previously introduced grading by the British Hypertension Society. To conclude, the upper-arm manometers have a measuring accuracy for SBP a little higher than that of the wrist manometers, while there is no bigger difference in the measuring accuracy of DBP. The most important point is that the measuring accuracy in a single patient is unpredictable. If home readings are prepared, a test of the accuracy against auscultatory recordings should be done in every single patient. In the clinical wards, it is important to be aware of the measuring accuracy if oscillometric measurements are introduced replacing auscultatory measurements. [ABSTRACT FROM AUTHOR]
- Published
- 2003
- Full Text
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36. Smoking Related to 24-h Ambulatory Blood Pressure and Heart Rate.
- Author
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Mikkelsen, Kim L., Wiinberg, Niels, Høegholm, Asbjørn, Christensen, Hanne R., Bang, Lia E., Nielsen, Poul Ebbe, Svendsen, Tage Lysbo, Kampmann, Jens P., Madsen, Niels H., and Bentzon, Michael W.
- Published
- 1997
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37. 24-h ambulatory blood pressure in 352 normal Danish subjects, related to age and gender*.
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Wiinberg, Niels, Høegholm, Asbjørn, Christensen, Hanne R., Bang, Lia E., Mikkelsen, Kim L., Nielsen, Poul Ebbe, Svendsen, Tage L., Kampmann, Jens P., Madsen, Niels H., and Bentzon, Michael W.
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- 1995
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38. Noninvasive 24-hour ambulatory arterial blood pressure monitoring in cirrhosis.
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Møller, Søren, Wiinberg, Niels, and Henriksen, Jens H.
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- 1995
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39. High prevalence of peripheral arterial disease in hypertension
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Wiinberg, Niels and Mehlsen, Jesper
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- 2005
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40. Is a difference in arm blood pressure a useable indicator of peripheral arterial disease?
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Mehlsen, Jesper, Bruce, Christopher, and Wiinberg, Niels
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- 2005
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41. Oscillometric blood pressure measurement: A simple method in screening for peripheral arterial disease
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Mehlsen, Jesper and Wiinberg, Niels
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- 2005
- Full Text
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42. Brachial artery compliance, neurohormones and vascular collagen in hypertension accompanied by left ventricular hypertrophy. A life study
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Tuxen, Christian D., Wiinberg, Niels, Olsen, Michael H., Wachtell, Kristian, Hildebrandt, Per R., and Mehlsen, Jesper
- Published
- 2005
- Full Text
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43. Antihypertensive treatment in an elderly Danish population - treatment patterns
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Talleruphuus, Ulrik, Bang, Lia E., Wiinberg, Niels, Mehlsen, Jesper, and Svendsen, Tage L.
- Published
- 2003
- Full Text
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44. Comparison of brachial artery diameter measured by oscillometry and ultrasound
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Wiinberg, Niels and Jespersen, Lillian
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- 2003
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45. P-30: Screening for peripheral vascular disease with a simple oscillometric blood pressure equipment.
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Wiinberg, Niels and Mehlsen, Jesper
- Published
- 2001
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46. P-283: Compliance of peripheral conduit arteries is increased in isolated systolic hypertension accompanied by left ventricular hypertrophy, a life-substudy.
- Author
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Wiinberg, Niels, Tuxen, Christian, Mehlsen, Jesper, and Hildebrandt, Per
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- 2001
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47. P-282: Change in compliance of peripheral conduit arteries during treatment of hypertension accompanied by left ventricular hypertrophy, a life-substudy.
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Tuxen, Christian, Wiinberg, Niels, Hildebrandt, Per, and Mehlsen, Jesper
- Published
- 2001
- Full Text
- View/download PDF
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