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Behrens S, Bönnemann H, Matoussevitch N, Dinjus E, Modrow H, Palina N, Frerichs M, Kempter V, Maus-Friedrichs W, Heinemann A, Kammel M, Wiedenmann A. Air-stable Co-, Fe-, and Fe/Co-Nanoparticles and Ferrofluids. ACTA ACUST UNITED AC 2009. [DOI: 10.1524/zpch.2006.220.1.3] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Summary
Air-stable Co, Fe, and Fe/Co nanoparticles are accessible by thermolysis of the metal carbonyl precursors in the presence of aluminium alkyls and subsequent “smooth oxidation”. The structure of the particles was investigated by transmission electron microscopy (TEM, HRTEM), X-ray absorption spectroscopy (XAS), X-ray and ultraviolet photoelectron spectroscopy (XPS, UPS), metastable impact electron spectroscopy (MIES), and small-angle neutron scattering (SANS). The peptization of the nanoparticles with suitable surfactants (oleic and lauric acid, sodium dioctylsulfosuccinate (AOT), LP-4 (a fatty acid condensation polymer), and KorantinSH (N-oleyl sarcosine)) yields magnetic fluids dispersed in carrier liquids such as toluene, kerosene, vacuum and mineral oils which are remarkably stable in air under ambient conditions. The resulting magnetic fluids show good magnetic properties. Several methods for the preparation of water-based MF are presented, e.g., formation of surfactant bilayers, using phase transfer agents, or surface modification with L-cysteine ethyl ester. Water-based metallic magnetic fluids have a high potential for a number of technical and biomedical applications. Technical applications of the Co-based ferrofluids in the field of positioning systems and magnetohydrostatic bearings were investigated. The results emphasize the scope of nanoparticulate ferrofluids having a metallic core.
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Maier B, Behrens S, Busse R, Jonitz G, Schoeller R, Schuehlen H, Theres H. Überlegungen zu Validität und Vergleichbarkeit von Daten der Todesursachenstatistik, GKV Daten und Registerdaten am Beispiel Herzinfarkt. DAS GESUNDHEITSWESEN 2009. [DOI: 10.1055/s-0029-1239099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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78
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Behrens S, Ehlers C, Brüggemann T, Ziss W, Dissmann R, Galecka M, Willich SN, Andresen D. Modification of the circadian pattern of ventricular tachyarrhythmias by beta-blocker therapy. Clin Cardiol 2009; 20:253-7. [PMID: 9068912 PMCID: PMC6655728 DOI: 10.1002/clc.4960200313] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
BACKGROUND Sudden cardiac death exhibits a circadian variation and predominantly occurs during morning hours, Beta-adrenergic antagonists have shown to blunt this morning peak. However, previous reports studying the effects of beta blockers on the circadian variation did not analyze the underlying cause of sudden cardiac death. It thus remains unclear whether ventricular tachyarrhythmias are influenced by beta-blocker therapy. HYPOTHESIS This study tested the hypothesis that beta-blocking agents blunt the morning peak of life-threatening ventricular tachyarrhythmias. METHODS In 87 patients who were treated and monitored with an implantable cardioverter defibrillator, the circadian distribution of ventricular tachyarrhythmias terminated by appropriate shocks was analyzed and compared in those receiving beta blockers versus those not receiving beta-blocker therapy. RESULTS Tachyarrhythmic episodes in the absence of beta-blocker therapy (n = 344) exhibited a circadian variation with a distinct morning peak (16, 38, 28, and 18% of episodes at 0-6, 6-12, 12-18, and 18-24 h, respectively, p < 0.001). In contrast, tachyarrhythmic episodes during beta-blocker therapy (n = 104) were equally distributed over time (22, 27, 24, and 27% of episodes at 0-6, 6-12, 12-18, and 18-24 h, respectively, p = 0.95). The circadian distribution of episodes was significantly different in patients with and those without beta blockade (p < 0.05). CONCLUSION Beta-adrenergic antagonists influence the circadian distribution of malignant ventricular tachyarrhythmias in patients with an implantable cardioverter defibrillator. The blunted morning peak of tachyarrhythmic events during beta blockade supports the hypothesis that a sympathetic surge is involved in the circadian pattern of malignant arrhythmias.
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Gödde P, Agrawal R, Müller HP, Czerski K, Endt P, Steinhoff U, Oeff M, Schultheiss HP, Behrens S. Magnetocardiographic mapping of QRS fragmentation in patients with a history of malignant tachyarrhythmias. Clin Cardiol 2009; 24:682-8. [PMID: 11594414 PMCID: PMC6654772 DOI: 10.1002/clc.4960241009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
BACKGROUND The identification of patients at increased risk for ventricular tachycardia or ventricular fibrillation (VT/VF) and sudden cardiac death has consequences for therapeutic options and thus may reduce mortality in patients with coronary artery disease (CAD). HYPOTHESIS We hypothesized that the intra-QRS fragmentation in magnetocardiographic recordings is increased in patients with CAD and with a history of VT/VF. METHODS Multichannel magnetocardiography (MCG) was carried out in 34 healthy controls, 42 patients with CAD without a history of VT/VF, and 43 patients with CAD and with a history of VT/VF. The intra-QRS fragmentation was quantified by a new fragmentation score. Its spatial distribution was investigated using two-dimensional (2-D) contour maps according to the sensor position of the 49-channel magnetogradiometer. RESULTS Patients with CAD and with a history of VT/VF had significantly increased QRS fragmentation compared with patients with CAD without VT/VF or controls (72.9+/-37.5, 48.5+/-14.3, and 42.5+/-7.8, respectively: p <0.05). The area of high fragmentation in 2-D contour maps was twice as large in patients with than in those without a history of VT/VF (represented by the number of MCG channels with high fragmentation: 26.3+/-15.5 vs. 12.4+/-9.9, p<0.0001). Patients prone to VT/VF could be identified with a sensitivity of 64% and a specificity of 90%. CONCLUSION In patients with CAD and with a history of VT/VF, intra-QRS fragmentation is increased and the area of high fragmentation in 2-D contour maps is enlarged. These findings may be helpful in identifying patients with CAD at risk for malignant tachyarrhythmias.
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Gorschinski A, Khelashvili G, Schild D, Habicht W, Brand R, Ghafari M, Bönnemann H, Dinjus E, Behrens S. A simple aminoalkyl siloxane-mediated route to functional magnetic metal nanoparticles and magnetic nanocomposites. ACTA ACUST UNITED AC 2009. [DOI: 10.1039/b911738e] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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81
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Nagele H, Behrens S, Eisermann C. Cardiac contractility modulation in non-responders to cardiac resynchronization therapy. Europace 2008; 10:1375-80. [DOI: 10.1093/europace/eun257] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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82
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Behrens S, Bönnemann H, Modrow H, Kempter V, Riehemann W, Wiedenmann A, Odenbach S, Will S, Thrams L, Hergt R, Müller R, Landfester K, Schmidt A, Schüler D, Hempelmann R. Synthesis and Characterization. ACTA ACUST UNITED AC 2008. [DOI: 10.1007/978-3-540-85387-9_1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
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83
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Maier B, Röhnisch JU, Behrens S, Graf-Bothe C, Kuckuck H, Schoeller R, Schuehlen H, Theres H. Impact of Time of Admission on Treatment and Outcome of Patients with ST-Elevation Myocardial Infarction. DAS GESUNDHEITSWESEN 2008. [DOI: 10.1055/s-0028-1086382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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84
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Domide D, Kaifer E, Mautz J, Walter O, Behrens S, Himmel H. Synthesis and Characterisation of Some New Zinc Carbamate Complexes Formed by CO2Fixation and Their Use as Precursors for ZnO Particles under Mild Conditions. Eur J Inorg Chem 2008. [DOI: 10.1002/ejic.200701308] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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85
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Gürler C, Feyen M, Behrens S, Matoussevitch N, Schmidt AM. One-step synthesis of functional Co nanoparticles for surface-initiated polymerization. POLYMER 2008. [DOI: 10.1016/j.polymer.2008.03.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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86
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Nägele H, Behrens S. Response to the Letter of de Cock et al. Pacing Clin Electrophysiol 2007. [DOI: 10.1111/j.1540-8159.2007.00859_2.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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87
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Habicht W, Behrens S, Böhm K, Dinjus E. Imaging of self-assembled tubulin polymorphs used as metallization templates. ACTA ACUST UNITED AC 2007. [DOI: 10.1088/1742-6596/61/1/075] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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88
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Nägele H, Hashagen S, Azizi M, Behrens S, Castel MA. Analysis of terminal arrhythmias stored in the memory of pacemakers from patients dying suddenly. ACTA ACUST UNITED AC 2007; 9:380-4. [PMID: 17434892 DOI: 10.1093/europace/eum040] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
AIMS Stored electrograms or marker channels are available in most of modern cardiac pacemaker models. We sought to analyse these information to uncover terminal events of pacemaker patients dying suddenly. Method and results We made post-mortem pacemaker (PM) interrogations in 19 patients dying suddenly out of hospital between the years 1997 and 2005 (mean age 59 +/- 13 years, 90% males). The systems had activated arrhythmia monitoring algorithms. Indications of pacing were sick sinus syndrome in seven, AV-block in five, and heart failure due to asynchrony in seven cases. The interrogated pacemakers were CHORUS 7034 (n = 12), CONTAK TR (n = 2), and INSYNC III (n = 5). For interpretation stored marker channels and electrograms were analysed. The mean observation time after PM implantation prior death was 2.11 +/- 1.44 years, the mean left ventricular ejection fraction from the last available echo examination in the year prior death was 27.5 +/- 8%, mean age was 63 +/- 12 years. In 17/19 cases (89%), a tachycardia (most likely ventricular tachycardia) was found correlating to the time of death. The mean cycle length of the terminal arrhythmia was 307 +/- 144 (250-344) ms, corresponding to a heart rate of 195 +/- 95 (174-240) bpm. We found no evidence of specific pacemaker-related problems such as electronic failure, battery depletion, or undersensing. CONCLUSIONS Post-mortem analysis of arrhythmia monitoring of pacemaker patients revealed tachycardias (most likely ventricular tachycardia) to be related to sudden death. These findings give some insight in mechanisms of terminal events in this group.
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Nägele H, Azizi M, Hashagen S, Castel MA, Behrens S. First experience with a new active fixation coronary sinus lead. Europace 2007; 9:437-41. [PMID: 17449876 DOI: 10.1093/europace/eum061] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
AIMS Coronary sinus (CS) lead implantation is a technically challenging procedure owing to variable vein anatomies and a high dislocation rate. Therefore, CS lead technology has undergone evolutionary changes during the last 10 years. The mode of fixation has been a passive one up to now. We want to describe our first clinical experience with the newly available active fixation lead 4195 in terms of dislocation rate and stability of thresholds compared with conventional models. METHODS AND RESULTS From 1999 to February 2007, we implanted 403 CS leads in 368 patients. Leads were categorized into three different groups on the basis of their fixation mechanism: straight (Easytrak I and Situs OTW; n = 54), curved (Attain 4193 and 4194, Corox, Aescula, Situs ULD; n = 308), and active (Attain 4195; n = 41). Operative and follow-up data were prospectively noted and checked for significance between groups during the first 3 months after implantation. Kaplan-Meier analysis of long-term lead function was also performed. Straight and curved CS leads suffered from significantly more dislocations compared with active fixation (P < 0.001). The active fixation lead (4195) has a stable threshold over time compared with a significant rise after 24 h and thereafter in straight (62%) and curved leads (20%). However, retraction of an active fixation CS lead may be a difficult issue as outlined in two cases requiring pullback of a 4195 lead owing to phrenic nerve stimulation (one unsuccessful despite vigorous traction). CONCLUSION The active fixation lead 4195 using retention lobes yielded stable thresholds over time and seems to be superior to conventional leads in terms of dislocation. However, extraction may be a difficult or even impossible task.
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Nägele H, Behrens S, Hashagen S, Azizi M. RHABDOMYOLYSIS AFTER ADDITION OF DIGITOXIN TO CHRONIC SIMVASTATIN AND AMIODARONE THERAPY. ACTA ACUST UNITED AC 2007; 22:195-200. [PMID: 17708069 DOI: 10.1515/dmdi.2007.22.2-3.195] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Rhabdomyolysis is a well known side effect of statin therapy. Several drugs may increase its risk by drug-drug interactions. In particular, patients with heart disease receive more and more different compounds to cope with all the pathomechanisms involved and may therefore be of high risk for side effects. We report a case of rhabdomyolysis in a patient with heart failure on a multi-drug regimen caused by a drug interaction between chronic statin therapy (simvastatin), amiodarone and newly administrated digitoxin. The patient recovered fully after cessation of simvastatin therapy, the other drugs were given continuously. Potential mechanisms of this event are discussed. Most interesting in this case is that rhabdomyolysis occurred only after starting digitoxin after long-term therapy with the statin.
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Laue H, Behrens S, Althaus M, Kraß S, Peitgen HO. Computergestützte Auswertung dynamischer MR-Daten mithilfe von Modellen der Kontrastmitteldynamik. ROFO-FORTSCHR RONTG 2007. [DOI: 10.1055/s-2007-977225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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92
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Nägele H, Hashagen S, Azizi M, Behrens S, Castel MA. Long-term hemodynamic benefit of biventricular pacing depending on coronary sinus lead position. Herzschrittmacherther Elektrophysiol 2006; 17:185-90. [PMID: 17211748 DOI: 10.1007/s00399-006-0533-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2006] [Accepted: 11/21/2006] [Indexed: 05/13/2023]
Abstract
BACKGROUND Acute studies in cardiac resynchronization therapy (CRT) showed that hemodynamic effects may depend on the coronary sinus (CS) lead position. However, there are no data on the longterm effect of CS lead position. METHODS In 45 heart failure patients with left bundle branch block and QRS >150 ms (age 59+/-10 years, 17 dilative cardiomyopathy, 23 ischemic, 5 valvular), biventricular pacemakers were implanted. CS leads were positioned in posterior (P, n=15), lateral (L, n=19) or, if no other option available, anterior (A, n=11) side branches. Before and 6 months after implantation, clinical state, echocardiography, brain natriuretic peptide (BNP) and right heart catheterization were evaluated. RESULTS Baseline parameters were similar between groups. After 6 months, there were 32/34 responders in groups P and L compared to 7/11 responders in group A (94 vs groups P and L: Arterial pressure +8 and +9% vs +2%; PCWP -23 and -15% vs -4%, pulmonary pressure -18 and -12% vs -3% (p<0.01 for A vs P+L); cardiac index +21 and +12% vs +11% (p=0.03 for A vs P). BNP was reduced by 55, 35, and 27% (p=0.05 for A vs P). Ejection fraction increased in P and L by 40 and 41%, respectively, but only by +19% in A (p<0.03 for A vs P+L). CONCLUSION Chronic CRT improves ejection fraction, BNP and hemodynamic measurements predominantly in patients with lateral and posterior CS lead positions. Anterior lead positions should be avoided.
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Korosoglou G, Behrens S, Bekeredjian R, Hardt S, Hagenmueller M, Dinjus E, Böhm KJ, Unger E, Katus HA, Kuecherer H. The potential of a new stable ultrasound contrast agent for site-specific targeting. An in vitro experiment. ULTRASOUND IN MEDICINE & BIOLOGY 2006; 32:1473-8. [PMID: 17045866 DOI: 10.1016/j.ultrasmedbio.2006.06.025] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2006] [Revised: 06/09/2006] [Accepted: 06/15/2006] [Indexed: 05/12/2023]
Abstract
Microbubble-based ultrasound contrast agents can be used for specific site targeting, but demonstrate time-limited opacification. We have previously demonstrated the potential of gold-bound microtubules to provide a stable ultrasound contrast effect. Aim of the present study was to test the feasibility of gold-bound microtubules specifically to bind to human thrombi and to inflammatory activated human umbilical vein endothelial cells (HUVEC) in vitro. HUVEC were incubated with tumor necrosis factor, to induce expression of adhesion molecules. Human clots and HUVEC were incubated with biotinylated monoclonal antifibrin and anti-E-selectin antibodies, respectively. Probes were incubated with excess avidin followed by biotinylated gold-bound microtubules and by secondary Cy3-anti-beta-tubulin antibody and processed for immune fluorescence microscopy. Clots were transferred in copolymer foils filled with buffer and were ultrasonographically imaged before and after their treatment with the antifibrin antibody and with biotinylated microtubules, using a broadband harmonic transducer, transmitting and receiving at a mean frequency of 1.7 MHz and 3.2 MHz. The feasibility of specific gold-bound microtubules conjugation to antibody treated clots and HUVEC was confirmed using immune fluorescence analysis. Contrast intensities of the clots significantly increased after their treatment with antifibrin antibody and incubation with gold-bound microtubules (39 +/- 2 dB versus 26 +/- 2 dB, p < 0.001) and remained high after 20 min of ultrasound exposure (37 +/- 2 dB versus 39 +/- 2 dB, p = NS). Thus, gold-bound microtubules can specifically bind to human thrombi and to endothelial cells, providing a significant contrast effect which remains stable in the ultrasound field. This may be a promising approach to target thrombi and inflammatory active atherosclerotic plaques.
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Nägele H, Ergin M, Azizi M, Behrens S, Jäckle S. Reversible impairment of myocardial function in Hanta virus infection – direct viral effect? Clin Res Cardiol 2006; 95:554-6. [PMID: 16845572 DOI: 10.1007/s00392-006-0419-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/01/2006] [Accepted: 06/07/2006] [Indexed: 10/24/2022]
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95
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Nägele H, Azizi M, Hashagen S, Behrens S. Long-term follow-up of a malpositioned ventricular pacing lead via the aortic valve. Clin Res Cardiol 2006; 95:488-91. [PMID: 16799878 DOI: 10.1007/s00392-006-0405-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/20/2006] [Accepted: 05/11/2006] [Indexed: 10/24/2022]
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96
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Behrens S, Habicht W, Wu J, Unger E. Tubulin assemblies as biomolecular templates for nanostructure synthesis: from nanoparticle arrays to nanowires. SURF INTERFACE ANAL 2006. [DOI: 10.1002/sia.2334] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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97
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Azizi M, Castel MA, Behrens S, Rödiger W, Nägele H. Experience with coronary sinus lead implantations for cardiac resynchronization therapy in 244 patients. Herzschrittmacherther Elektrophysiol 2006; 17:13-8. [PMID: 16547655 DOI: 10.1007/s00399-006-0502-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2005] [Accepted: 12/29/2005] [Indexed: 05/07/2023]
Abstract
INTRODUCTION Cardiac resynchronization therapy (CRT) using coronary sinus (CS) leads is a new method for the therapy of congestive heart failure (CHF). Because the intervention is more complex than regular pacemaker implantations, information on the feasibility and side effects of this method are of interest. METHODS From 1999 to June 2005, CRT implantations were attempted in 244 patients (pts; mean age 64+/-12 years, range 14-90 years), 82% were male, 44% had coronary artery disease, 29% were in atrial fibrillation, 71 had preexisting pacemakers. RESULTS In 97% of the pts the intervention was successful (27% of the systems with defibrillation capabilities). In 285 interventions, 255 CS leads were positioned according to CS vein anatomy in 130 posterolateral, 97 anterolateral and 28 anterior side branches (16 patients received 2 CS leads). Over-the-wire leads were used in 88%, 71% were additionally preshaped. We observed no mortality but 37 complications (12.5%): CS dissection in 9, CS perforation in 1, ventricular fibrillation in 4, asystole in 5, pulmonary edema in 1, pneumothorax in 2, need for early CS lead revision in 19 (dislodgement n=7, phrenic nerve stimulation n=12) and infection with explantation in 2 cases. An improvement in NYHA functional class was found in 88% of pts (only 55% if anterior lead position). CONCLUSION Perioperative complications during CS lead implantation occur in 10-15% of cases. Most patients responded well to CRT. Patients should be informed about the possible need for a reoperation. During implantation, immediate defibrillation and stimulation capabilities must be available. Anterior lead positions should be avoided.
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Habicht W, Behrens S, Unger E, Dinjus E. Cylindrical and ring-shaped tubulin assemblies as metallization templates explored by FESEM/EDX and SFM. SURF INTERFACE ANAL 2006. [DOI: 10.1002/sia.2256] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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99
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Behrens S, Kohle S, Rascher-Friesenhausen R, Bock S, König M, Laue H, Kraß S, Peitgen HO. Software-Assistent für die Auswertung dynamischer MR-Daten in der Diagnostik und im Therapieverlauf von Tumoren. ROFO-FORTSCHR RONTG 2006. [DOI: 10.1055/s-2006-941012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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100
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Maier B, Schuler J, Kallischnigg G, Behrens S. Stationäre Versorgung älterer Patienten (>75 Jahre) mit einem akuten Herzinfarkt: Daten des Berliner Herzinfarktregister. DAS GESUNDHEITSWESEN 2005. [DOI: 10.1055/s-2005-920667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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