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Klotz S, Welp H, Charitos EI, Sievers HH, Sindermann J, Scheld HH. Time on assist device predicts intermediate outcome after heart transplantation. Thorac Cardiovasc Surg 2012. [DOI: 10.1055/s-0031-1297499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Klotz S, Welp H, Charitos EI, Sievers HH, Scheld HH. Outcome of destination assist device therapy in age >60 years – Selection is everything -. Thorac Cardiovasc Surg 2012. [DOI: 10.1055/s-0031-1297541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Charitos EI, Hanke T, Stierle U, Gorski AW, Hemmer WB, Botha CA, Franke UFW, Dodge-Khatami A, Lange R, Hoerer J, Moritz A, Ferrari-Kühne K, Hetzer R, Hübler M, Bogers AJJC, Takkenberg JJM, Sievers HH. Update on reinterventions after the Ross procedure – Results of the German-Dutch Ross Registry. Thorac Cardiovasc Surg 2012. [DOI: 10.1055/s-0031-1297540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Guldner NW, Hardel T, Rumpf PM, Noel R, Kruse C, Sievers HH. Intra-myocardial homing of adult stem cells in a goat model: Glandular vs. Mesenchymal stem cells. Thorac Cardiovasc Surg 2012. [DOI: 10.1055/s-0031-1297855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Klotz S, Welp H, Sindermann J, Charitos EI, Sievers HH, Scheld HH. LVAD destination therapy in the era of organ shortage. Thorac Cardiovasc Surg 2012. [DOI: 10.1055/s-0031-1297751] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Sievers HH. Ross procedure. HSR PROCEEDINGS IN INTENSIVE CARE & CARDIOVASCULAR ANESTHESIA 2012; 4:119-23. [PMID: 23439768 PMCID: PMC3484939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
INTRODUCTION In 1967 Donald Ross introduced the subcoronary Ross procedure consisting of transplantation of the autologous pulmonary valve into aortic position. We describe our 15-year experience in Ross procedures. METHODS 576 subcoronary operations have been performed (436 male and 140 female patients); the mean age was 45±11.9 years. (range, 13 to 70 years). The mean follow-up was 7±4.2 years (range, 0 to 16 years). There were 4597 patient years at follow-up with a clinical completeness of 95% and echo completeness of 91%. RESULTS There were two operative deaths (0.3%) and 31 patients with reoperation. The survival is similar to that of the normal population and the freedom from allo- and autograft reoperation is 87% at 15 years. Autograft regurgitation at last examination was grade 0 in 40%, trace in 54%, grade I in 19%, grade II in 4% and grade III in 0.4%; the pressure gradient was smaller than 5 mmHg in 57% and between 5 and 10 mmHg in 24%. Only 6% had a transvalvular pressure gradient of more than 10 mmHg. DISCUSSION After 15 years of experience it can be concluded that the subcoronary technique provides near normal survival in adult patients, with excellent hemodynamics and acceptable rate of reoperations.
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Klotz S, Gebhard M, Sievers HH. Late left atrial thrombosis of an Amplatzer patent foramen ovale occluder. J Thorac Cardiovasc Surg 2011; 142:1270-1. [DOI: 10.1016/j.jtcvs.2011.05.024] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/23/2011] [Accepted: 05/25/2011] [Indexed: 10/18/2022]
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Belge G, Radtke A, Meyer A, Stegen I, Richardt D, Nimzyk R, Nigam V, Dendorfer A, Sievers HH, Tiemann M, Buchwalow I, Bullerdiek J, Mohamed SA. Upregulation of the high mobility group AT-hook 2 gene in acute aortic dissection is potentially associated with endothelial-mesenchymal transition. Histol Histopathol 2011; 26:1029-37. [PMID: 21692035 DOI: 10.14670/hh-26.1029] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The high mobility group AT-hook 2 (HMGA2) gene is proposed to regulate the genes involved in the epithelial-mesenchymal transition (EMT). One form of EMT is endothelial-mesenchymal transition (EndMT). We analyzed the expression profile of the HMGA2 gene in different human aortic diseases. Aortic specimens were collected from 51 patients, including 19 with acute aortic dissection, 26 with aortic aneurysm, two with Marfan syndrome and four aortic valves. Quantitative real-time polymerase chain reaction was carried out for HMGA2 and immunohistochemical analyses were performed for HMGA2, SNAI1, Vimentin, CD34, MKI-67 and TGFB1. The expression of let-7d microRNA, which is assumed to play a role in the regulation of HMGA2, was also quantified. The level of HMGA2 gene expression was significantly higher in acute aortic dissection compared with all the other samples (193.1 vs. 8.1 fold normalized to calibrator, P<0.001). The immunohistochemical investigation showed that HMGA2, SNAI1, and Vimentin proteins were mainly detected in the endothelial cells of the vasa vasorum. The HMGA2 gene is upregulated in acute aortic dissection. This is the first report describing a link between HMGA2 and acute aortic dissection. The HMGA2, SNAI1 and Vimentin proteins were mainly detected in the endothelium of the vasa vasorum. It seems that HMGA2 overexpression in acute aortic dissection occurs in a let-7d-independent manner and is associated with EndMT of the vasa vasorum.
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Charitos E, Hanke T, Richardt D, Stierle U, Sievers HH. Up to 16 years experience with the subcoronary Ross procedure: Results from a single center. Thorac Cardiovasc Surg 2011. [DOI: 10.1055/s-0030-1268968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Guldner NW, Girndt B, Zimmermann H, Bastian F, Weigel G, Noel R, Sievers HH. Titanium coating of glutaraldehyde-fixed heart valve prostheses enables a reduced immune response and a self-seeding within circulation. Thorac Cardiovasc Surg 2011. [DOI: 10.1055/s-0030-1269349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Hanke T, Charitos E, Stierle U, Sievers HH. Is a physiological aortic valve function feasible after aortic valve replacement procedures? - A comparative study between the ross operation, aortic valve preserving procedures, stentless valves and a healthy control group. Thorac Cardiovasc Surg 2011. [DOI: 10.1055/s-0030-1269081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Sier HA, Sievers HH, Charitos E, Richardt D, Stierle U, Hanke T. Acute type A dissection: A comparative study between the reimplantation and remodeling procedure and the „gold Standard“. Thorac Cardiovasc Surg 2011. [DOI: 10.1055/s-0030-1269134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Rylski B, Südkamp M, Beyersdorf F, Nitsch B, Hoffmann I, Blettner M, Moritz A, Mohr FW, Carrel T, Karck M, Beyer M, Vahl CF, Harringer W, Stock U, Dapunt O, Reichenspurner H, Laufer G, Reichart B, Jakob H, Matschke K, Diegeler A, Sievers HH, Walther T, Schäfers HJ, Däbritz S, Warnecke H, Kellner HJ, Scheld HH, Gummert J, Autschbach R, Welz A, Rieß FC, Leyh R, Posival H, Massoudy P, Ennker J, Weinhold C, Steinhoff G, Cremer J, Franke U, Dörge H, Kuntze T, Fischlein T, Hausmann H, Wimmer-Greinecker G, Silber RE, Doenst T, Doll N, Hammel D, Weigang E. Differences in management and outcomes between young and elderly patients with acute aortic dissection type A: Results from the German Registry for Acute Aortic Dissection type A (GERAADA). Thorac Cardiovasc Surg 2011. [DOI: 10.1055/s-0030-1269135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Hanke T, Charitos E, Stierle U, Ad N, Misfeld M, Mohammed S, Sievers HH. The true atrial fibrillation burden after the Cox-Maze-III Cryo procedure in high risk patients with long-standing persistent atrial fibrillation - first report of event recorder documented continuous heart rhythm follow-up. Thorac Cardiovasc Surg 2011. [DOI: 10.1055/s-0030-1269195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Guldner NW, Klapproth P, Großherr M, Saraei R, Rhode D, Noel R, Sievers HH. New aspects for a surgical heart failure therapy with skeletal muscle using fatigue-resistant type IIa muscle fibres. Thorac Cardiovasc Surg 2011. [DOI: 10.1055/s-0030-1269237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Scharfschwerdt M, Pavlik M, Sievers HH, Charitos E. In-vitro investigation of aortic valve annuloplasty using prosthetic ring devices. Thorac Cardiovasc Surg 2011. [DOI: 10.1055/s-0030-1269208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Mohamed SA, Radtke A, Nymzek R, Bullerdiek J, Belge G, Sievers HH. Genetic association of single nucleotide polymorphisms in the endothelial nitric oxide gene in patients with bicuspid aortic valve and ascending aneurysm. Thorac Cardiovasc Surg 2011. [DOI: 10.1055/s-0030-1268952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Richardt D, Charitos E, Stierle U, Sievers HH. Clinical outcome beyond 10 years in patients undergoing the subcoronary Ross operation. A single centre experience. Thorac Cardiovasc Surg 2011. [DOI: 10.1055/s-0030-1269199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Scharfschwerdt M, Sievers HH, Sier HA. Hemodynamics of the Edwards Sapien valve in non-circular aortic annuli. Thorac Cardiovasc Surg 2011. [DOI: 10.1055/s-0030-1269010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Conzelmann L, Hoffmann I, Blettner M, Moritz A, Mohr FW, Beyersdorf F, Carrel T, Karck M, Beyer M, Vahl CF, Harringer W, Stock U, Dapunt O, Reichenspurner H, Laufer G, Reichart B, Jakob H, Matschke K, Diegeler A, Sievers HH, Walther T, Schäfers HJ, Däbritz S, Warnecke H, Kellner HJ, Scheld HH, Gummert J, Autschbach R, Welz A, Rieß FC, Leyh R, Posival H, Massoudy P, Ennker J, Weinhold C, Steinhoff G, Cremer J, Franke U, Dörge H, Kuntze T, Fischlein T, Hausmann H, Wimmer-Greinecker G, Silber RE, Doenst T, Doll N, Hammel D, Weigang E. Risk factors for new postoperative neurological disorders in patients with acute aortic dissection type A - data from the German Registry for Acute Aortic Dissection type A (GERAADA). Thorac Cardiovasc Surg 2011. [DOI: 10.1055/s-0030-1268926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Hanke T, Hendrik J, Anderson I, Schön J, Heinze H, Sievers HH, Heringlake M. High sensitive troponin t is superior to additive Euroscore for predicting 30 and 90 day mortality in non-coronary cardiac surgery. Thorac Cardiovasc Surg 2011. [DOI: 10.1055/s-0030-1269386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Easo J, Weigang E, Hölzl P, Horst M, Moritz A, Mohr FW, Carrel T, Karck M, Beyer M, Vahl CF, Harringer W, Stock U, Reichenspurner H, Laufer G, Reichart B, Jakob H, Matschke K, Diegeler A, Sievers HH, Walther T, Schäfers HJ, Däbritz S, Warnecke H, Kellner HJ, Scheld HH, Gummert J, Autschbach R, Welz A, Rieß FC, Leyh R, Posival H, Massoudy P, Ennker J, Weinhold C, Steinhoff G, Cremer J, Franke U, Dörge H, Kuntze T, Fischlein T, Hausmann H, Wimmer-Greinecker G, Silber RE, Doenst T, Doll N, Hammel D, Hoffmann I, Blettner M, Dapunt O. Influence of operative strategy for Debakey Type I Aortic Dissection-Analysis of the GERAADA Registry. Thorac Cardiovasc Surg 2011. [DOI: 10.1055/s-0030-1268927] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Nigam V, Sievers HH, Jensen BC, Sier HA, Simpson PC, Srivastava D, Mohamed SA. Altered microRNAs in bicuspid aortic valve: a comparison between stenotic and insufficient valves. THE JOURNAL OF HEART VALVE DISEASE 2010; 19:459-465. [PMID: 20845893 PMCID: PMC4242684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
BACKGROUND AND AIM OF THE STUDY Bicuspid aortic valve (BAV), the most common form of congenital heart disease, is a leading cause of aortic stenosis (AS) and aortic insufficiency (AI). AS is typically caused by calcific valve disease. Recently, microRNAs (miRNAs) have been shown to modulate gene expression. The study aim was to examine the miRNAs that were altered in the aortic valve leaflets of patients with AS compared to those in patients with AI. In-vitro experiments were also carried out to determine if these miRNAs could modulate calcification-related genes. METHODS Aortic valve samples (fused and unfused leaflets) were collected from nine male patients (mean age 44.9 +/- 13.8 years) undergoing aortic valve replacement (AVR). PIQOR miRXplore Microarrays containing 1,421 miRNAs were used and hybridized to fused leaflet samples labeled with Cy5; unfused samples were used as controls and labeled with Cy3. A quantitative reverse transcription-polymerase chain reaction (qRT-PCR) was performed to validate the miRNA array results. Cultured human aortic valve interstitial cells (AVICs) were treated with miRNA mimics, and qRT-PCR was carried out to determine any changes in mRNAs. RESULTS By microarray analysis, seven miRNAs were shown to be statistically different between the AS and AI patients. In the stenotic samples, the MiR-26a and miR-195 levels were shown (by qRT-PCR) to be reduced by 65% and 59%, respectively (p < 0.05), and MiR-30b to be reduced by 62% (p < 0.06). Human AVICs treated with miR-26a or miR-30b mimics showed decreased mRNA levels of calcification-related genes. MiR-26a repressed BMP2 by 36%, alkaline phosphatase (ALPL) by 38%, and SMAD1 by 26%, while MiR-30b reduced the expression of SMAD1 by 18% and of SMAD3 by 12%. In contrast, miR-195-treated AVICs had increased mRNA levels of calcification-related genes, such as BMP2 by 68% and RUNX2 by 11%. CONCLUSION MiR-26a, miR-30b, and miR-195 were each decreased in the aortic valves of patients requiring AVR due to AS, compared to those requiring replacement due to AI. These miRNAs appear to modulate calcification-related genes in vitro.
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Hörer J, Stierle U, Bogers AJ, Rein JG, Hetzer R, Sievers HH, Lange R. Re-interventions on the autograft and the homograft after the Ross operation in children☆. Eur J Cardiothorac Surg 2010; 37:1008-14. [DOI: 10.1016/j.ejcts.2009.10.032] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/20/2009] [Revised: 10/13/2009] [Accepted: 10/26/2009] [Indexed: 10/19/2022] Open
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