C A Schneider

University of Cologne, Köln, North Rhine-Westphalia, Germany

Are you C A Schneider?

Claim your profile

Publications (43)86.39 Total impact

  • R. Pfister, C.A. Schneider
    [Show abstract] [Hide abstract]
    ABSTRACT: Diabetes mellitus ist eine komplexe Stoffwechselerkrankung, die sowohl direkt als auch indirekt über arteriosklerotische Gefäßveränderungen zu einer Schädigung des Myokards führen kann.Koronare Herzerkrankung (KHK) und Herzinsuffizienz sind mit ca. 75% die häufigsten Todesursachen bei Diabetikern in Europa. Die Therapie der verschiedenen Herzerkrankungen unterscheidet sich heute noch nicht zwischen Diabetiker und Nichtdiabetiker. Aufgrund des sehr hohen Ausgangsrisikos werden Diabetiker aber grundsätzlich aggressiver behandelt.
    06/2011: pages 553-557;
  • R. Pfister, C. A. Schneider
    [Show abstract] [Hide abstract]
    ABSTRACT: Zusammenfassung Diabetes mellitus und Herzinsuffizienz zeigen eine hohe Koexistenz und begünstigen sich gegenseitig in der Entstehung. Die Koexistenz der beiden Erkrankungen ist mit einer sehr ungünstigen Prognose assoziiert. Es existiert praktisch keine Evidenz für Behandlungsempfehlungen zur Prävention der Herzinsuffizienz bei Diabetes und zur antihyperglykämischen Therapie bei manifester Herzinsuffizienz. Die allgemein empfohlene Herzinsuffizienztherapie scheint hingegen bei Diabetikern genauso effektiv zu sein wie bei Nichtdiabetikern und sollte konsequent durchgeführt werden.
    Der Diabetologe 06/2011; 7(4):247-253. DOI:10.1007/s11428-011-0707-y · 0.06 Impact Factor
  • Source
    Roman Pfister, R Cairns, E Erdmann, C A Schneider
    [Show abstract] [Hide abstract]
    ABSTRACT: Although a resting electrocardiograph is broadly applied in clinical practice for evaluating patients with Type 2 diabetes and cardiovascular disease, the independent prognostic relevance of electrocardiographic signs has not thoroughly been examined. Baseline 12-lead electrocardiographs available in 5231 of the 5238 participants of the PROactive trial were analysed for heart rate, heart rate corrected QT-interval, presence of atrial fibrillation/flutter, left axis deviation, right and left bundle branch block. The association of electrocardiographic signs with total mortality, the principal secondary composite endpoint (death, myocardial infarction and stroke) and serious adverse heart failure events was examined by Cox-regression analysis. Two hundred and twenty-three (4.3%) patients showed atrial fibrillation/flutter, 213 (4.1%) patients had right bundle branch block, 111 (2.1%) patients had left bundle branch block and 706 (13.5%) patients had left axis deviation. Mean cQT-interval was 418 ms (± 25 ms) and mean heart rate was 72/min (± 14/min). In multivariate adjusted analyses, heart rate and cQT-interval were significantly associated with mortality, the composite secondary endpoint and heart failure, whereas right and left bundle branch blocks were significantly associated with heart failure only. Left axis deviation was associated with heart failure and atrial fibrillation/flutter was associated with mortality and heart failure in univariate but not multivariate analyses. Easily assessable electrocardiographic signs such as heart rate, cQT-interval and bundle branch blocks were predictive for adverse outcome independently of multiple risk factor adjustment and should be considered in clinical care.
    Diabetic Medicine 03/2011; 28(10):1206-12. DOI:10.1111/j.1464-5491.2011.03281.x · 3.06 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Worsening renal function (WRF) is frequently observed in patients with heart failure and is associated with worse outcome. The aim of this study was to examine the association of the cardiac serum marker N-terminal pro-B-type natriuretic peptide (NT-pro-BNP) and WRF. A total of 125 consecutive patients of a tertiary care outpatient clinic for heart failure prospectively underwent evaluation of renal function every 6 months. The association of baseline NT-pro-BNP with WRF was analysed during a follow up of 18 months. Twenty-eight (22.4%) patients developed WRF (increase in serum creatinine ≥0.3 mg/dL). Patients with WRF (2870 pg/mL, interquartile range (IQR) 1063-4765) had significantly higher baseline NT-pro-BNP values than patients without WRF (547 pg/mL, IQR 173-1454). The risk for WRF increased by 4.0 (95% CI 2.1-7.5) for each standard deviation of log NT-pro-BNP. In multivariable analysis including age, baseline renal function, ejection fraction, New York Heart Association class and diuretic dose, only NT-pro-BNP and diabetes were independent predictors of WRF. At a cut-off level of 696 pg/mL, NT-pro-BNP showed a sensitivity of 92.9% and a negative predictive value of 96.4% for WRF. NT-pro-BNP is a strong independent predictor of WRF within 18 months in patients with systolic heart failure with a high negative predictive value. Further studies are needed to evaluate reno-protective strategies in patients with elevated NT-pro-BNP.
    Internal Medicine Journal 02/2010; 41(6):467-72. DOI:10.1111/j.1445-5994.2010.02203.x · 1.70 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: A single measurement of glycated hemoglobin (HbA1c) is a weak predictor for cardiovascular events in patients without Type 2 diabetes mellitus. We hypothesized that dynamic changes in HbA1c (Delta-HbA1c) would better predict cardiovascular outcome than a single value. In 99 consecutive patients with stable coronary artery disease (CAD) and without diabetes mellitus who were seen twice in our outpatient clinic (4-6 months apart) in 1998, Delta-HbA1c (follow-up HbA1c--baseline HbA1c) was assessed. Between August and September 2007 (mean observation period 9.1 yr), patients and their physicians were contacted by telephone to evaluate the incidence of cardiovascular endpoints. The combined primary endpoint of our study was defined as the incidence of myocardial infarction, stroke or death from any cause. The endpoints were validated by chart review. Multivariate analysis demonstrated that the change of HbA1c between first and second examination in 1998 was the most powerful parameter for prediction of the combined primary endpoint in the next 9 yr. The hazard ratio was 5.03 [95% confidence interval (CI) 1.4-17.9] for any increase in HbA1c and 1.99 (95%CI 1.3-3.0) for an HbA1c increase of 0.3%. In addition, Kaplan-Meier survival analysis showed a significant association between endpoint-free survival and dynamic changes in HbA1c. Hence, changes in the glucometabolic milieu within 4-6 months calculated by the difference of two values of HbA1c affect the long-term prognosis of patients with CAD but without diabetes mellitus.
    Journal of endocrinological investigation 07/2009; 32(7):564-7. DOI:10.3275/6363 · 1.55 Impact Factor
  • C. A. Schneider, F. M. Baer
    [Show abstract] [Hide abstract]
    ABSTRACT: Die gutachterliche Beurteilung in der Medizin verlangt neben medizinischer Fachkompetenz, Berufserfahrung und sozialmedizinischen Kenntnissen die Fähigkeit und den Willen, einen Sachverhalt unparteiisch und unvoreingenommen zu beurteilen. Der Gutachter ist dabei in seiner Beurteilung unabhängig und in seiner Entscheidung nur seinem Gewissen verpflichtet. Aus dieser verantwortungsvollen Position erwächst die Verpflichtung des Gutachters zur selbstständigen, gründlichen Erhebung von Anamnese und körperlichem Untersuchungsbefund, zur systematischen Analyse von Vorbefunden sowie zur kritischen Würdigung der Gesamtbefunde im Licht des aktuellen medizinischen Wissenstands.
    11/2008: pages 515-524;
  • Source
    Journal of endocrinological investigation 05/2008; 31(4):382-3. DOI:10.1007/BF03346375 · 1.55 Impact Factor
  • Source
    R Pfister, D Tan, J Thekkanal, E Erdmann, C A Schneider
    [Show abstract] [Hide abstract]
    ABSTRACT: B-type natriuretic peptides are excellent markers of cardiac function and are strong prognostic parameters in patients with coronary heart disease and heart failure. We examined the diagnostic and prognostic value of natriuretic peptides in a heterogeneous group of patients of a cardiological university hospital. NT-pro-BNP was assessed in 573 inpatients (66 % male, median age 66 years) and association with demographic and cardiological parameters, in-hospital course as well as the combined endpoint of death, heart failure hospitalization and stroke was analyzed during a median follow-up time of 1117 days. NT-pro-BNP was significantly associated with age, diastolic blood pressure, renal function, previous myocardial infarction, arterial occlusive disease, atrial fibrillation, NYHA class and left-ventricular dysfunction. Differentiation of distinct cardiac diseases by NT-pro-BNP was not possible. NT-pro-BNP identified patients with a length of hospital stay of more than 12 days with a sensitivity of 88,2 % and a negative predictive value of 97 %. Supramedian NT-pro-BNP values (> 300 pg/ml) indicated a relative risk for the combined endpoint of 7,5 (95 % CI 4,1 - 13,8) compared to inframedian NT-pro-BNP values. Prognostic value of NT-pro-BNP was independent of and stronger than demographic and cardiological risk markers. NT-pro-BNP is a strong and independent predictor of in-hospital course and long-term outcome in inpatients with cardiovascular disease. NT-pro-BNP assessment allows a risk-adapted patient management for non-cardiologists.
    DMW - Deutsche Medizinische Wochenschrift 03/2008; 133(12):564-9. DOI:10.1055/s-2008-1067282 · 0.55 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: The influence of dynamic changes in glycated haemoglobin (HbA(1c)) on restenosis after elective percutaneous coronary intervention (PCI) in patients without diabetes has not been analysed. Therefore, the rate of restenosis was investigated after elective PCI in 101 consecutive patients without diabetes mellitus in relation to dynamic changes of HbA(1c) levels. Follow-up angiography was performed in all patients 4-6 months after intervention. Multivariate analysis demonstrated that the change in HbA(1c) between first and second coronary angiography was the most powerful metabolic parameter for prediction of restenosis. The odds ratio for restenosis was 3.0 (95% CI 1.0-9.0) for any increase in HbA(1c) and 1.9 (95% CI 1.1-3.5) for an HbA(1c) increase of 0.2%. Hence, chronic changes in the glucometabolic environment influence the incidence of restenosis after PCI in patients without diabetes.
    Diabetic Medicine 03/2008; 25(2):228-31. DOI:10.1111/j.1464-5491.2007.02320.x · 3.06 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Cardiac hypertrophy is an independent risk factor for heart failure. Recent studies on gene regulation of proteins have involved intracellular Ca2+ homeostasis. The Ca2+-sensitive phosphatase, calcineurin, is one potential regulator of the hypertrophic response, so we aimed to investigate the calcineurin-dependent signal pathway at different stages of hypertrophy in human myocardium. We found the calcineurin pathway to be significantly activated in hypertrophic compared with non-hypertrophic myocardium as demonstrated by increased calcineurin activity and expression of calcineurin A-beta and B, and GATA-4, and a shift of phosphorylated cytoplasmic NFAT-3 into the nucleus as dephosphorylated nuclear NFAT-3. There was a tendency for these changes to be more pronounced in the decompensated compared with the compensated hypertrophic myocardium. The present study provides evidence for significant activation of the Ca2+-triggered calcineurin pathway in hypertrophic humans. Already present in compensated hypertrophy it showed a tendency to a further increase following transition to decompensated hypertrophy.
    The Journal of international medical research 11/2007; 35(6):803-18. DOI:10.1177/147323000703500609 · 1.10 Impact Factor
  • Source
    C A Schneider, E Erdmann
    DMW - Deutsche Medizinische Wochenschrift 10/2007; 132(39):2024. DOI:10.1055/s-2007-985636 · 0.55 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: The prognostic value of NT-pro-BNP has not been thoroughly evaluated in diabetic inpatients with manifest cardiovascular disease. NT-pro-BNP was measured in 156 patients with type 2 diabetes mellitus hospitalised due to cardiovascular disease. The association of NT-pro-BNP with mortality and the combined endpoint (CE) of death, heart failure decompensation, stroke and myocardial infarction was analysed during a median follow-up time of 1183 days. Patients who died (1669 IQR 788-5640 vs. 398, IQR 158-990 pg/ml) and patients with CE (1353, IQR 730-4289 vs. 304, IQR 128-784 pg/ml, both p=0.0001) had significantly elevated NT-pro-BNP compared to patients without the corresponding endpoint. Patients with supramedian NT-pro-BNP (>518 pg/ml) had significantly worse outcome regarding mortality (HR 5.5, 95%CI 2.0-14.8) and CE (HR 5.0, 95%CI 2.2-11.2) than patients with inframedian values even after adjustment for age, NYHA class and renal function. At a cut-off of 422 pg/ml, NT-pro-BNP showed a sensitivity of 89.6% and a negative predictive value of 92.8% for detection of patients with future CE. In this sample of diabetic patients with a broad spectrum of cardiovascular disease, NT-pro-BNP was a strong predictor of long-term outcome. NT-pro-BNP measured at discharge identifies high-risk patients independently of the underlying heart disease.
    Acta Diabetologica 06/2007; 44(2):91-7. DOI:10.1007/s00592-007-0248-4 · 3.68 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: Besides classical, modifiable risk factors (hypercholesterolemia, hypertension, smoking) abnormalities of the glucose metabolism (diabetes mellitus, impaired glucose tolerance) are strong emerging cardiovascular risk factors. Epidemiological data indicate that 8 % of the population and up to 60 % of patients with coronary artery disease have abnormalities of glucose metabolism. The prevalence of these abnormalities will increase as the population ages and the mean body weight increases. An abnormal glucose concentration damages the endothelium in several ways: increased oxidative stress, inflammatory processes and an activation of procoagulant factors all impair endothelial function. A blood glucose normalising therapy is thought to decrease the incidence of cardiovascular events in these patients. In patients with an acute myocardial infarction and diabetes mellitus an early intensive insulin therapy improves the outcome of these patients. In summary, the early detection and treatment of abnormalities of glucose metabolism reduces cardiac events.
    DMW - Deutsche Medizinische Wochenschrift 12/2004; 129(47):2553-7. · 0.55 Impact Factor
  • R Pfister, CA Schneider
    [Show abstract] [Hide abstract]
    ABSTRACT: A growing body of literature describes diagnostic and prognostic value of B-type natriuretic peptides (BNP) in cardiac diseases since it was first described in 1988. As BNP is mainly secreted in the left ventricular (LV) myocardium, BNP was found to reflect LV function much better than any other neurohumoral factor. Thus, BNP is recommended as the first noninvasive blood test for determination of cardiac function by some authors. The introduction of fully automated, rapid bioassays for measurement of BNP and the aminoterminal part of its pro-hormone (NT-pro-BNP) made it possible to use the test even in emergency care settings. Here we review the literature with special focus on assessment of BNP and NT-pro-BNP in the following clinical settings: community screening for LV dysfunction, primary diagnosis of heart failure in general practice and emergency department (ED) and risk stratification in cardiac dysfunction and acute coronary syndromes. In addition, we discuss which applications can be recommended for daily clinical use from the cardiologist's point of view.
    Clinica Chimica Acta 12/2004; 349(1-2):25-38. DOI:10.1016/j.cccn.2004.06.018 · 2.82 Impact Factor
  • DMW - Deutsche Medizinische Wochenschrift 11/2004; 129(47):2553-2557. DOI:10.1055/s-2004-835301 · 0.55 Impact Factor
  • C A Schneider, E Erdmann
    [Show abstract] [Hide abstract]
    ABSTRACT: Secondary prevention includes all measures to lower the risk of a relapse of a specific disease. For secondary prevention of cardiovascular diseases general measures and specific drug therapy are employed, according to the individual risk pattern. Among the general measures cessation of smoking is most important. In addition, an increase in daily exercise, a normalization of body weight and a healthy diet all lower the cardiovascular risk. For most cases secondary prevention includes also specific drug therapies. Aspirin, statins and beta-blockers are the cornerstones of this drug therapy. After myocardial infarction most patients will also benefit from an ACE-inhibitor therapy.
    Der Internist 07/2004; 45 Suppl 1:S23-30. · 0.27 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: B-type natriuretic peptide (BNP) is a strong diagnostic predictor of left-ventricular (LV)-dysfunction. Recently, the aminoterminal portion of pro-BNP (NT-proBNP) has been introduced, which could be even more sensitive because of its longer half-life. The aim of this study was to evaluate the new marker NT-proBNP within a large, heterogeneous population of patients with suspected cardiovascular disease at risk of cardiovascular dysfunction and to compare it with the established diagnostic parameter BNP. NT-proBNP and BNP were measured in 339 hospitalised patients undergoing diagnostic angiography (median age 66 years, 244 male vs. 95 female). Median values of NT-proBNP increased with worsening LV-dysfunction and higher NYHA class. The area under the receiver operator characteristics curve (AUC) of NT-proBNP for detecting severe systolic dysfunction or for detecting any systolic LV-dysfunction was 0.83 and 0.77, respectively. The latter improved (AUC=0.81) when patients with clinically relevant heart disease like valvular dysfunction were included, independent of the haemodynamic values. Compared to BNP, NT-proBNP tended to be more accurate in identifying lesser degrees of LV-dysfunction. Even after optimisation of target criteria, there was still a substantial overlap of NT-proBNP values between patients with and without relevant heart disease. Therefore, NT-proBNP is not suitable as a screening test for LV-dysfunction in the community. Nevertheless, because of its good negative predictive value, NT-proBNP could be an easy and effective tool to rule out severe systolic LV-dysfunction in high risk patients. No clinically significant advantage of BNP testing could be found.
    European Journal of Heart Failure 04/2004; 6(3):289-93. DOI:10.1016/j.ejheart.2003.12.012 · 6.58 Impact Factor
  • C. A. Schneider, E. Erdmann
    [Show abstract] [Hide abstract]
    ABSTRACT: Sekundrprvention bezeichnet Manahmen, die das Rezidiv einer bestimmten Erkrankung verhindern sollen. Zur Sekundrprvention kardiovaskulrer Erkrankungen zhlen unter Bercksichtigung der individuellen Risikofaktoren neben den Allgemeinmanahmen auch spezifische medikamentse Therapien. Unter den Allgemeinmanahmen ist der Rauchstopp die mit Abstand wichtigste Einzelmanahme. Aber auch vermehrte Bewegung, gesunde Ernhrung und Gewichtsreduktion tragen zu einer Verminderung der Wahrscheinlichkeit eines erneuten kardiovaskulren Ereignisses bei. Zur medikamentsen Standardtherapie zhlen die Therapie mit Acetylsalicylsure, Statinen und -Blockern. In der Regel wird diese Therapie mit einer ACE-Hemmertherapie kombiniert.Secondary prevention includes all measures to lower the risk of a relapse of a specific disease. For secondary prevention of cardiovascular diseases general measures and specific drug therapy are employed, according to the individual risk pattern. Among the general measures cessation of smoking is most important. In addition, an increase in daily exercise, a normalization of body weight and a healthy diet all lower the cardiovascular risk. For most cases secondary prevention includes also specific drug therapies. Aspirin, statins and beta-blockers are the cornerstones of this drug therapy. After myocardial infarction most patients will also benefit from an ACE-inhibitor therapy.
    Der Internist 01/2004; 45:S23-S30. DOI:10.1007/s00108-004-1221-8 · 0.27 Impact Factor
  • R Pfister, E Erdmann, CA Schneider
    DMW - Deutsche Medizinische Wochenschrift 06/2003; 128(18):1007-12. DOI:10.1055/s-2003-38957 · 0.55 Impact Factor

Publication Stats

414 Citations
86.39 Total Impact Points

Institutions

  • 1994–2011
    • University of Cologne
      • • Department of Internal Medicine
      • • Institute of Clinical Chemistry
      • • Division of Cardiology, Pneumology, Angiology and Intensive Care
      • • Department of Nuclear Medicine
      Köln, North Rhine-Westphalia, Germany