126
|
Stephan M, Mugrauer K, Korr H, Schmitz C, Gündel H, Hörsten SV. Postnatale maternale Deprivationseffekte in adulten Ratten: Interaktion reduzierter Kleinhirnneuronenzahlen und Motorfunktionsleistung mit genetischem Hintergrund. Psychother Psychosom Med Psychol 2009. [DOI: 10.1055/s-0029-1208179] [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]
|
127
|
Schmitz C, Schirrmeister J, Herberg U, Kozlik-Feldmann R, Stüber F, Welz A, Breuer J. "Rapid two-stage" Norwood operation in a child with multiorgan failure. Pediatr Cardiol 2009; 30:77-9. [PMID: 18626682 DOI: 10.1007/s00246-008-9261-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/26/2007] [Revised: 04/07/2008] [Accepted: 06/06/2008] [Indexed: 10/21/2022]
Abstract
The Norwood I operation continues to be a procedure with significant operative mortality. One well-accepted risk factor for death after the first step of the Norwood operation is critical preoperative status. We describe herein a new concept for the treatment of patients with hypoplastic left heart syndrome (HLHS) in very poor preoperative condition. This is a case report of a child who was born in a rural hospital. On the second day of life he was referred to our center in multiorgan failure. There were signs of liver dysfunction and the child was anuric. Therapy was started immediately with prostaglandin and vasodilators as well as diuretics, milrinone, and dobutamine. However, systemic perfusion continued to be insufficient. Finally, the child was placed on a ventilator. On the fourth day of life, bilateral pulmonary artery (PA) banding was performed and circulation stabilized immediately. Two hours after the operation urine output started. Liver function stabilized over the next couple of days. Two days after PA banding the child was weaned from the ventilator. On the 12th day of life a Norwood operation with PA debanding and a right ventricle-PA conduit was performed, and 2 days postoperatively the child was weaned from the ventilator. Twenty days after the operation he was discharged home. When the boy was 4 months old a bidirectional cavopulmonary anastomosis was performed. In selected cases of patients with HLHS with very poor hemodynamic conditions, a rapid two-stage approach with bilateral banding followed by a Norwood operation after cardiac stabilization can be recommended.
Collapse
|
128
|
Haeberle S, Schmitz C, Lueth T, Beiras-Fernandez A, Schmauss D, Reichart B, Sodian R. 3D-printing of models for surgical planning in cardiovascular surgery. Thorac Cardiovasc Surg 2009. [DOI: 10.1055/s-0029-1191522] [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]
|
129
|
Sodian R, Malec E, Däbritz S, Januszewska K, Birnbaum J, Netz H, Schmitz C, Reichart B. Heart transplantation in pediatric patients after failing single ventricle palliation. Thorac Cardiovasc Surg 2009. [DOI: 10.1055/s-0029-1191628] [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]
|
130
|
Schmauss D, Sodian R, Schmitz C, Bigdeli A, Schmoeckel M, Lueth T, Freudenthal F, Reichart B, Kozlik-Feldmann R. 3D-printing models to create custom-made devices for coil embolisation of anastomotic leak after aortic arch replacement. Thorac Cardiovasc Surg 2009. [DOI: 10.1055/s-0029-1191739] [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]
|
131
|
Schmitz C, Esmailzadeh B, Herberg U, Lang N, Sodian R, Kozlik-Feldmann R, Welz A, Breuer J. Hybrid procedures can reduce the risk of congenital cardiovascular surgery. Thorac Cardiovasc Surg 2009. [DOI: 10.1055/s-0029-1191322] [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]
|
132
|
Schmitz C, Lang N, Fuchs F, Meyer-Gold A, Lehner A, Abicht J, Reichart B, Sodian R, Netz H, Kozlik-Feldmann R. Development of a hybrid technique for closure of muscular ventricular septal defects. Thorac Cardiovasc Surg 2009. [DOI: 10.1055/s-0029-1191683] [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]
|
133
|
Januszewska K, Malec E, Däbritz S, Diterich J, Fuchs A, Loeff M, Sodian R, Schmitz C, Netz H, Reichart B. Ventricular assist device as a bridge for heart transplantation in children – does it influence the results? Thorac Cardiovasc Surg 2009. [DOI: 10.1055/s-0029-1191531] [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]
|
134
|
Dzemali O, Bakhtiary F, Steinseiffer U, Schmitz C, Glasmacher B, Moritz A, Kleine P. Impact of valve calcification on systolic and diastolic valvular function--an in vitro model. THE JOURNAL OF CARDIOVASCULAR SURGERY 2008; 49:817-824. [PMID: 19043396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
AIM Despite continuous development of anticalcification treatment for bioprosthetic valves, calcification remains one major cause of structural failure. The aim of this study is to investigate changes in hemodynamic performance and leaflet kinematics in progressively calcified pericardial and porcine aortic valve prostheses. METHODS Five pericardial (Edwards Perimount Magna) and 5 porcine (Medtronic Mosaic Ultra) aortic valve prostheses (Ø23 mm) were exposed to a high concentration Calcium-phosphate fluid in an in vitro pulse duplicator (300 cycles/minute) for 6 weeks. The prostheses were removed weekly and tested in an artificial circulation system (70 beats/min, Cardiac Output 5 l/min). All prostheses underwent X-ray, computed tomography (CT)-Scan and photographic examination for evaluation of progressive calcification. Leaflet kinematics were visualized with a high-speed camera. RESULTS Pericardial valves demonstrated faster degeneration with significantly larger radiographic areas of leaflet calcification (16.5+/-4.3% versus 5.6%+/-2.0%) and also significantly higher Ca-uptake (170+/-71 microg/mg versus 103+/-49 microg/mg) after 6 weeks. Despite degeneration systolic function remained superior for pericardial valves (mean effective orifice area [EOA] 1.52+/-0.05 versus 1.28+/-0.11 cm2, P<0.01), but leaflet kinematics showed longer closing times (135+/-11 msec versus 85+/-9 msec after 6 weeks) accompanied by higher regurgitant flow (7.8+/-1.12 mL versus 1.2+/-0.28 mL, P<0.001). CONCLUSION In vitro pericardial valves calcified faster and more severe than porcine valves leading to impaired diastolic function with prolongation of closing times and higher closing volume. Systolic function remained almost undisturbed by the calcification process. As a consequence in clinical settings, follow-up examinations for structural valve deterioration in porcine valves should focus on systolic performance, in pericardial valves on diastolic function.
Collapse
|
135
|
Schaefermeier PK, Szymanski D, Weiss F, Fu P, Lueth T, Schmitz C, Meiser BM, Reichart B, Sodian R. Design and fabrication of three-dimensional scaffolds for tissue engineering of human heart valves. ACTA ACUST UNITED AC 2008; 42:49-53. [PMID: 18987474 DOI: 10.1159/000168317] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2008] [Accepted: 08/21/2008] [Indexed: 11/19/2022]
Abstract
We developed a new fabrication technique for 3-dimensional scaffolds for tissue engineering of human heart valve tissue. A human aortic homograft was scanned with an X-ray computer tomograph. The data derived from the X-ray computed tomogram were processed by a computer-aided design program to reconstruct a human heart valve 3-dimensionally. Based on this stereolithographic model, a silicone valve model resembling a human aortic valve was generated. By taking advantage of the thermoplastic properties of polyglycolic acid as scaffold material, we molded a 3-dimensional scaffold for tissue engineering of human heart valves. The valve scaffold showed a deviation of only +/-3-4% in height, length and inner diameter compared with the homograft. The newly developed technique allows fabricating custom-made, patient-specific polymeric cardiovascular scaffolds for tissue engineering without requiring any suture materials.
Collapse
|
136
|
Gantert M, Hürter HE, van Kooten IAJ, Garnier Y, Mallmann P, Schmitz C. Vermehrte Anzahl zerebellärer Körnerzellen nach LPS-Injektion bei Schaffeten–ein mögliches Tiermodell zur Erforschung von Autismus. Geburtshilfe Frauenheilkd 2008. [DOI: 10.1055/s-0028-1088584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
|
137
|
Ostendorf F, Schmitz C, Hirth S, Kühnle A, Kolodziej JJ, Reichling M. How flat is an air-cleaved mica surface? NANOTECHNOLOGY 2008; 19:305705. [PMID: 21828772 DOI: 10.1088/0957-4484/19/30/305705] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Muscovite mica is an important mineral that has become a standard substrate, due to its easy cleavage along the {001} planes, revealing a very flat surface that is compatible with many biological materials. Here we study mica surfaces by dynamic atomic force microscopy (AFM) operated in the non-contact mode (NC-AFM) under ultra-high vacuum (UHV) conditions. Surfaces produced by cleaving in UHV cannot be imaged with NC-AFM due to large surface charges; however, cleavage in air yields much less surface charge and allows for NC-AFM imaging. We present highly resolved NC-AFM images of air-cleaved mica surfaces revealing a rough morphology originating from a high density of nanometre-sized particles. Among these particles, we find regularly shaped structures indicating the growth of crystallites on the surface. The contamination layer cannot be removed by degassing in UHV; even prolonged heating at a temperature of 560 K under UHV conditions does not yield an atomically flat surface.
Collapse
|
138
|
Lemmens MA, Sierksma S, Dennissen F, Heck K, Steinbusch H, Schmitz C. P1‐088: Neuron and synaptophysin immunoreactive presynaptic bouton loss in the frontal cortex of a novel transgenic mouse model of Alzheimer's disease. Alzheimers Dement 2008. [DOI: 10.1016/j.jalz.2008.05.674] [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]
|
139
|
Hausdorf J, Lemmens MAM, Heck KDW, Grolms N, Korr H, Kertschanska S, Steinbusch HWM, Schmitz C, Maier M. Selective loss of unmyelinated nerve fibers after extracorporeal shockwave application to the musculoskeletal system. Neuroscience 2008; 155:138-44. [PMID: 18579315 DOI: 10.1016/j.neuroscience.2008.03.062] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2008] [Revised: 03/24/2008] [Accepted: 03/24/2008] [Indexed: 11/26/2022]
Abstract
Application of extracorporeal shockwaves (ESW) to the musculoskeletal system may induce long-term analgesia in the treatment of chronic tendinopathies of the shoulder, heel and elbow. However, the molecular and cellular mechanisms behind this phenomenon are largely unknown. Here we tested the hypothesis that long-term analgesia caused by ESW is due to selective loss of nerve fibers in peripheral nerves. To test this hypothesis in vivo, high-energy ESW were applied to the ventral side of the right distal femur of rabbits. After 6 weeks, the femoral and sciatic nerves were investigated at the light and electron microscopic level. Application of ESW resulted in a selective, substantial loss of unmyelinated nerve fibers within the femoral nerve of the treated hind limb, whereas the sciatic nerve of the treated hind limb remained unaffected. These data might indicate that alleviation of chronic pain by selective partial denervation may play an important role in the effects of clinical ESW application to the musculoskeletal system.
Collapse
|
140
|
Hürter HE, Gantert M, van Kooten IAJ, Steinbusch HWM, van Engeland H, Garnier Y, Hof PR, Kramer BW, Mallmann P, Schmitz C. Vermehrte Anzahl zerebellärer Körnerzellen nach pränataler LPS-Applikation bei Schaffeten nach Amniozentese – ein mögliches neues Tiermodell zur Erforschung von Autismus. Geburtshilfe Frauenheilkd 2008. [DOI: 10.1055/s-2008-1075744] [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] Open
|
141
|
Kozlik-Feldmann R, Lang N, Sodian R, Aumann R, Rassoulian D, Hinterseer M, Schmitz C, Netz H. Creation of ventricular septal defects on the beating heart in a new pig model. Eur Surg Res 2008; 40:297-303. [PMID: 18285690 DOI: 10.1159/000117635] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2007] [Accepted: 10/29/2007] [Indexed: 11/19/2022]
Abstract
BACKGROUND/AIMS So far, surgical and interventional therapies for muscular ventricular septal defects (mVSDs) beyond the moderator band have had their limitations. Thus, alternative therapeutic strategies should be developed. We present a new animal model for the evaluation of such strategies. METHODS In a pig model (n = 9), anterolateral thoracotomy was performed for exposure of the left ventricle. mVSDs were created under two- and three-dimensional echocardiography with a 7.5-mm sharp punch instrument, which was forwarded via a left ventricular puncture without extracorporeal circulation. RESULTS Creation of mVSDs was successful in all animals (n = 9) confirmed by echocardiography, hemodynamic measurements and autopsy. The defects were located in the midmuscular (n = 4), apical (n = 1), inlet (n = 2) and anterior part (n = 2) of the muscular septum. All animals were hemodynamically stable for further procedures. The diameter and shunt volume of the mVSDs were 4.8-7.3 mm (mean: 5.9 mm) and 12.9-41.3% (mean: 22.1%), respectively. Autopsy confirmed in all animals the creation of a substantial defect. CONCLUSION The described new technique for creation of an mVSD on the beating heart in a pig model is suitable for the evaluation of new therapeutic strategies for mVSD closure.
Collapse
|
142
|
Sodian R, Däbritz S, Malec E, Januszewska K, Weber S, Markert M, Lueth T, Loeff M, Reichart B, Schmitz C. Pediatric cardiac transplantation: 3D anatomic models for surgical planning of heart transplantation in patients with univentricular heart. Thorac Cardiovasc Surg 2008. [DOI: 10.1055/s-2008-1037962] [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]
|
143
|
Jungmann E, Bolle J, Schmitz C, Snelting U. Schnell-wirksame Insulin-Analoga sind humanem Normalinsulin bei der intensivierten Insulintherapie des Typ-2-Diabetes mellitus überlegen. DIABETOL STOFFWECHS 2008. [DOI: 10.1055/s-2008-1076355] [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]
|
144
|
Jungmann E, Bolle J, Schmitz C, Snelting U. Prävention der Folgekrankheiten des Typ-2-Diabetes mellitus in der täglichen Praxis: Defizite bei der Wahrnehmung kardiovaskulärer Risiken durch die Patienten. DIABETOL STOFFWECHS 2008. [DOI: 10.1055/s-2008-1076443] [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]
|
145
|
Schmitz C, Sodian R, Schmoeckel M, Kaczmarek I, Malec E, Urschel S, Kozlik-Feldmann R, Kowalski C, Wittmann G, Netz H, Meiser B, Reichart B. AB0-incompatible heart transplantation in young infants. Thorac Cardiovasc Surg 2008. [DOI: 10.1055/s-2008-1037725] [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]
|
146
|
Schmitz C, Meiser B, Kaczmarek I, Kellerer D, Sodian R, Kreuzer E, Dalla Pozza R, Kozlik-Feldmann R, Netz H, Überfuhr P, Reichart B. 25 years of heart-lung transplantation in Munich. Thorac Cardiovasc Surg 2008. [DOI: 10.1055/s-2008-1038009] [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]
|
147
|
Tischer T, Milz S, Weiler C, Pautke C, Hausdorf J, Schmitz C, Maier M. Dose-Dependent New Bone Formation by Extracorporeal Shock Wave Application on the Intact Femur of Rabbits. Eur Surg Res 2008; 41:44-53. [DOI: 10.1159/000128279] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2007] [Accepted: 12/11/2007] [Indexed: 12/23/2022]
|
148
|
Januszewska K, Reichart B, Kolcz J, Schmitz C, Sodian R, Malec E. Long term results of the right ventricle-to-pulmonary artery shunt in Norwood procedure for children with hypoplastic left heart syndrome. Thorac Cardiovasc Surg 2008. [DOI: 10.1055/s-2008-1037719] [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]
|
149
|
Abstract
The neurobiology and neuropathology of the autism spectrum disorders (ASD) remain poorly defined. Brain imaging studies suggest that the deficits in social cognition, language, communication and stereotypical patterns of behaviour that are manifest in individuals with ASD, are related to functional disturbance and 'disconnectivity', affecting multiple brain regions. These impairments are considered to arise as a consequence of abnormal pre- and postnatal development of a distributed neural network. Examination of the brain post mortem continues to provide fundamental information concerning the cellular and subcellular alterations that take place in the brain of autistic individuals. Neuropathological observations that have emerged over the past decade also point towards early pre- and postnatal developmental abnormalities that involve multiple regions of the brain, including the cerebral cortex, cortical white matter, amygdala, brainstem and cerebellum. However, the neuropathology of autism is yet to be clearly defined, and there are several areas that remain open to further investigation. In this respect, more concerted efforts are required to examine the various aspects of cellular pathology affecting the brain in autism. This paper briefly highlights four key areas that warrant further evaluation.
Collapse
|
150
|
Schiller W, Rudorf H, Kiderlen MJ, Welzel CB, Schmitz C, Probst C, Welz A. Short-Term Tissue Response of Lapine Carotid Artery Microanastomoses to BioGlue®. Thorac Cardiovasc Surg 2007; 55:298-303. [PMID: 17629859 DOI: 10.1055/s-2007-965282] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
BACKGROUND Minimally invasive coronary artery surgery needs fast, reliable and easy methods of carrying out anastomoses. The aim of our study was to evaluate the use of BioGlue in sutureless vascular anastomoses in the lapine model. METHODS In 24 New Zealand white rabbits, 43 transsected carotid arteries were re-anastomosed using either a combination of balloon catheterisation and BioGlue or a conventional suture. In five carotid arteries, only BioGlue was applied. The animals were euthanised and tissue samples were taken for histological and immunohistological examination. RESULTS A higher inflammatory cell infiltrate was present in the glue control and glue anastomosis groups, with the invasion of inflammatory cells located especially at the junction between the wall with and the wall without glue. Early calcification was detected in two arteries. CONCLUSION The results of this short-term study show that the rabbit is an adequate as well as a sensitive model for the study of microanastomoses by glueing. Marked inflammatory reactions developed which may lead to vascular sclerosis or stenosis, and long-term studies are necessary to elucidate this problem further.
Collapse
|