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Müller M, Foldyna B, Lücke C, Nitzsche S, Etz C, Gutberlet M, Lehmkuhl L. Computertomografie-basierte Differenzierung der akuten Mediastinitis von postoperativen Residuen nach Sternotomie. ROFO-FORTSCHR RONTG 2016. [DOI: 10.1055/s-0036-1581814] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Lücke C, Foldyna B, Andres C, Boehmer-Lasthaus S, Grothoff M, Nitzsche S, Gutberlet M, Lehmkuhl L. Post-processing in cardiovascular computed tomography: performance of a client server solution versus a stand-alone solution. ROFO-FORTSCHR RONTG 2014; 186:1111-21. [PMID: 25122171 DOI: 10.1055/s-0034-1366726] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
PURPOSE To compare the performance of server-based (CSS) versus stand-alone post-processing software (ES) for the evaluation of cardiovascular CT examinations (cvCT) and to determine the crucial steps. MATERIALS AND METHODS Data of 40 patients (20 patients for coronary artery evaluation and 20 patients prior to transcatheter aortic valve implantation [TAVI]) were evaluated by 5 radiologists with CSS and ES. Data acquisition was performed using a dual-source 128-row CT unit (SOMATOM Definition Flash, Siemens, Erlangen, Germany) and a 64-row CT unit (Brilliance 64, Philips, Hamburg, Germany). The following workflow was evaluated: Data loading, aorta and coronary segmentation, curved multiplanar reconstruction (cMPR) and 3 D volume rendering technique (3D-VRT), measuring of coronary artery stenosis and planimetry of the aortic annulus. The time requirement and subjective quality for the workflow were evaluated. RESULTS The coronary arteries as well as the TAVI data could be evaluated significantly faster with CSS (5.5 ± 2.9 min and 8.2 ± 4.0 min, respectively) than with ES (13.9 ± 5.2 min and 15.2 ± 10.9 min, respectively, p ≤ 0.01). Segmentation of the aorta (CSS: 1.9 ± 2.0 min, ES: 3.7 ± 3.3 min), generating cMPR of coronaries (CSS: 0.5 ± 0.2 min, ES: 5.1 ± 2.6 min), aorta and iliac vessels (CSS: 0.5 ± 0.4 min and 0.4 ± 0.4 min, respectively, ES: 1.6 ± 0.7 min and 2.8 ± 3 min, respectively) could be performed significantly faster with CSS than with ES with higher quality of cMPR, measuring of coronary stenosis and 3D-VRT (p < 0.05). CONCLUSION Evaluation of cvCT can be accomplished significantly faster and better with CSS than with ES. The segmentation remains the most time-consuming workflow step, so optimization of segmentation algorithms could improve performance even further.
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Affiliation(s)
- C Lücke
- Diagnostic and Interventional Radiology, University Leipzig - Heart Centre, Leipzig
| | - B Foldyna
- Diagnostic and Interventional Radiology, University Leipzig - Heart Centre, Leipzig
| | - C Andres
- Diagnostic and Interventional Radiology, University Leipzig - Heart Centre, Leipzig
| | | | - M Grothoff
- Diagnostic and Interventional Radiology, University Leipzig - Heart Centre, Leipzig
| | - S Nitzsche
- Diagnostic and Interventional Radiology, University Leipzig - Heart Centre, Leipzig
| | - M Gutberlet
- Diagnostic and Interventional Radiology, University Leipzig - Heart Centre, Leipzig
| | - L Lehmkuhl
- Diagnostic and Interventional Radiology, University Leipzig - Heart Centre, Leipzig
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Hildebrand L, Krieghoff C, Grotthoff M, Lehmkuhl LL, Lücke C, Nitzsche S, Barten MJ, Mohr FW, Gutberlet MM. Multisequentielle Verlaufskontrolle über 24 Monaten nach Herztransplantation (HTx) mit der Kardio-MRT (cMRT) in Korrelation zur Endomyokardbiopsie (EMB). ROFO-FORTSCHR RONTG 2014. [DOI: 10.1055/s-0034-1372893] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Lehmkuhl L, Foldyna B, Haensig M, von Aspern K, Lücke C, Andres C, Grothoff M, Riese F, Nitzsche S, Holzhey D, Linke A, Mohr FW, Gutberlet M. Role of preprocedural computed tomography in transcatheter aortic valve implantation. ROFO-FORTSCHR RONTG 2013; 185:941-949. [PMID: 24490256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
UNLABELLED Transcatheter aortic valve implantation (TAVI) is currently considered an acceptable alternative for the treatment of patients with severe aortic stenosis and a high perioperative risk or a contraindication for open surgery. The benefit of TAVI significantly outweighs the risk of the procedure in patients requiring treatment that are not suitable for open surgery, and leads to a lower mortality in the one-year follow-up. The absence of a direct view of the aortic root and valve remains a challenge for the transcatheter approach. While direct inspection of the aortic valve during open surgery allows an adequate prosthesis choice, it is crucial for TAVI to know the individual anatomical details prior to the procedure in order to assure adequate planning of the procedure and proper prosthesis choice and patient selection. Among the imaging modalities available for the evaluation of patients prior to TAVI, computed tomography (CT) plays a central role in patient selection. CT reliably visualizes the dimensions of the aortic root and allows a proper choice of the prosthesis size. The morphology of the access path and relevant comorbidities can be assessed. The present review summarizes the current state of knowledge regarding the value of CT in the evaluation of patients prior to TAVI. CT plays a central role in patient selection and planning prior to TAVI. CT reliably detects the dimensions of the aortic root including the size of the aortic annulus, the degree of valve calcification and the morphology of the access routes. KEY POINTS CT plays a central role in patient selection and planning prior to TAVI. CT reliably detects the dimensions of the aortic root including the size of the aortic annulus, the degree of valve calcification and the morphology of the access routes. CT provides a more accurate measurement of the aortic annulus than 2D TEE and CT is the only imaging modality that allows a risk assessment for paravalvular leakages based on the calcification of the aortic valve.
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Lehmkuhl L, Foldyna B, Haensig M, von Aspern K, Lücke C, Andres C, Grothoff M, Riese F, Nitzsche S, Holzhey D, Linke A, Mohr FW, Gutberlet M. Role of Preprocedural Computed Tomography in Transcatheter Aortic Valve Implantation. ROFO-FORTSCHR RONTG 2013; 184:941-9. [DOI: 10.1055/s-0033-1350416] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- L. Lehmkuhl
- Dept. of Interventional and Diagnostic Radiology, University of Leipzig - Heart Center, Leipzig
| | - B. Foldyna
- Dept. of Interventional and Diagnostic Radiology, University of Leipzig - Heart Center, Leipzig
| | - M. Haensig
- Clinic for Cardiac Surgery, University of Leipzig - Heart Center, Leipzig
| | - K. von Aspern
- Clinic for Cardiac Surgery, University of Leipzig - Heart Center, Leipzig
| | - C. Lücke
- Dept. of Interventional and Diagnostic Radiology, University of Leipzig - Heart Center, Leipzig
| | - C. Andres
- Dept. of Interventional and Diagnostic Radiology, University of Leipzig - Heart Center, Leipzig
| | - M. Grothoff
- Dept. of Interventional and Diagnostic Radiology, University of Leipzig - Heart Center, Leipzig
| | - F. Riese
- Dept. of Interventional and Diagnostic Radiology, University of Leipzig - Heart Center, Leipzig
| | - S. Nitzsche
- Dept. of Interventional and Diagnostic Radiology, University of Leipzig - Heart Center, Leipzig
| | - D. Holzhey
- Clinic for Cardiac Surgery, University of Leipzig - Heart Center, Leipzig
| | - A. Linke
- Dept. of Cardiology, University of Leipzig - Heart Center, Leipzig
| | - F.-W. Mohr
- Clinic for Cardiac Surgery, University of Leipzig - Heart Center, Leipzig
| | - M. Gutberlet
- Dept. of Interventional and Diagnostic Radiology, University of Leipzig - Heart Center, Leipzig
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Grothoff M, Tille M, Lehmkuhl L, Luecke C, Thiele H, Riese F, Nitzsche S, Gutberlet M. MRT Analyse des rechtsventrikulären Remodellings nach ST-Hebungsinfarkt. ROFO-FORTSCHR RONTG 2013. [DOI: 10.1055/s-0033-1346319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Hildebrand L, Krieghoff C, Grotthoff M, Lehmkuhl L, Lücke C, Andres C, Nitzsche S, Barten M, Mohr FW, Gutberlet M. Wertigkeit der MRT zur Beurteilung einer Abstoßungsreaktion nach Herztransplantation in Korrelation zur Endomyokardbiopsie (EMB). ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0032-1311283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Andres C, Lehmkuhl L, Lücke C, Foldyna B, Schaaf S, Grothoff M, Nitzsche S, Scheinert D, Schmidt A, Gutberlet M. Post-EVAR Follow-Up infrarenaler Aortenaneurysmen mittels dynamischer CT-Angiographie (dCTA): Klinische Relevanz der neu detektierten Endoleaks. ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0032-1311061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Foldyna BF, Lücke C, Aspern KV, Hänsig M, Schaaf S, Andres C, Grothoff M, Nitzsche S, Gutberlet M, Lehmkuhl L. Computertomographische Evaluation möglicher intraproceduraler Obstruktionen der Koronarostien durch die native Aortenklappentaschen während transapikaler Aortenklappenimplantation. ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0032-1311280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Lücke C, Andres C, Foldyna B, Grothoff M, Nitzsche S, Lehmkuhl L, Gutberlet M. Workflowanalyse einer „stand alone“- versus Client-Server-basierten 3D-Nachverarbeitung EKG-getriggerter kardialer Bilddaten. ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0032-1311329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Lehmkuhl L, Linke B, Musayeva L, Lücke C, Andres C, Foldyna B, Grothoff M, Nitzsche S, Gutberlet M. Bildqualität in der kraniellen Computertomographie (CT): Iterative Rekonstruktion im Vergleich zur Filtered Back-Projection. ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0032-1311107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Foldyna B, Lücke C, Aspern KV, Hänsig M, Schaaf S, Andres C, Grothoff M, Nitzsche S, Gutberlet M, Lehmkuhl L. Computertomographische Evaluation möglicher intraproceduraler Obstruktionen der Koronarostien durch die native Aortenklappentaschen während transapikaler Aortenklappenimplantation. ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0031-1300886] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Schaaf S, Foldyna B, Lücke C, Andres C, Aspern KV, Grothoff M, Nitzsche S, Gutberlet M, Lehmkuhl L. Abweichungen zwischen unterschiedlich basierten aortalen Expansionsraten in der CT. ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0031-1300917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Hildebrand L, Krieghoff C, Grothoff M, Lehmkuhl L, Lücke C, Andres C, Nitzsche S, Barten M, Mohr FW, Gutberlet M. Wertigkeit der MRT zur Beurteilung einer Abstoßungsreaktion nach Herztransplantation in Korrelation zur Endomyokardbiopsie (EMB). ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0031-1300857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Lücke C, Foldyna B, Andres C, Grothoff M, Nitzsche S, Gutberlet M, Lehmkuhl L. Einfluss von EKG-Qualitäten auf die Strahlendosis der prospektiv getriggerten Computertomografie des Herzens. ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0031-1300863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Nitzsche S, Woischnick T, Lücke C, Grothoff M, Lehmkuhl L, Piorkowski C, Hindricks G, Gutberlet M. Beurteilung des linksatrialen und linksventrikulären Remodeling mit Kardio-MRT nach Ablationsbehandlung von Vorhofflimmern. ROFO-FORTSCHR RONTG 2011. [DOI: 10.1055/s-0031-1279436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Andres C, Lehmkuhl L, Lücke C, Krieghoff C, Hoffmann J, Foldyna B, Schaaf S, Grothoff M, Nitzsche S, Scheinert D, Gutberlet M. Endoleak-Detektion in der 4D-CT-Angiographie (4D-CTA) nach endovaskulärer Stentgraftimplantation bei infrarenalem Bauchaortenaneurysma (EVAR): KM-Dynamik und optimaler Untersuchungszeitpunkt. ROFO-FORTSCHR RONTG 2011. [DOI: 10.1055/s-0031-1279180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Riese F, Künzel E, Lücke C, Nitzsche S, Grothoff M, Gatzka C, Pap G, Gutberlet M. Indirekte MR-Arthrographie der Hüfte mittels 3Tesla MRT und dGEMRIC Knorpeldarstellung in Korrelation zum arthroskopischen Befund beim femoroazetabulären Impingement. ROFO-FORTSCHR RONTG 2011. [DOI: 10.1055/s-0031-1279335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Grothoff M, Hoffmann J, Lehmkuhl L, Abdul-Khaliq H, Nitzsche S, Mahler A, Dähnert I, Berger F, Gutberlet M. Time course of right ventricular functional parameters after surgical correction of tetralogy of Fallot determined by cardiac magnetic resonance. Clin Res Cardiol 2010; 100:343-50. [DOI: 10.1007/s00392-010-0252-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/01/2010] [Accepted: 11/03/2010] [Indexed: 11/28/2022]
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Romswinkel SR, Lücke C, Kämpfert J, Nitzsche S, Grothoff M, Schuler G, Mohr FW, Walther T, Gutberlet M. Prä- und postoperatives Monitoring zerebraler Mikroembolien nach konventionellem, apikalem und kathetergestütztem Aortenklappenersatz mit der Magnet Resonanz Tomographie (MRT). ROFO-FORTSCHR RONTG 2010. [DOI: 10.1055/s-0030-1252647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Lehmkuhl L, Aspern KV, Foldyna B, Grothoff M, Nitzsche S, Herz F, Gutberlet M. Vermessung der Aortenwurzel bei Patienten vor transapikalem Aortenklappenersatz mit Dyna-CT und Computertomographie: Zuverlässigkeit und Variabilität. ROFO-FORTSCHR RONTG 2010. [DOI: 10.1055/s-0030-1252839] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Foldyna B, Apsern KV, Herz F, Grothoff M, Nitzsche S, Gutberlet M, Lehmkuhl L. Genauigkeit der CT-Koronarangiographie bei Patienten mit hochgradiger Aortenstenose vor transapikalem Aortenklappenersatz. ROFO-FORTSCHR RONTG 2010. [DOI: 10.1055/s-0030-1252574] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Grothoff M, Elpert C, Lehmkuhl L, Hoffmann J, Nitzsche S, Thiele H, Gutberlet M. Rechtsventrikuläre Beteiligung bei akutem Myokardinfarkt. Evaluation von Ödem, Delayed Enhancement und RV Funktion mittels MRT und ihr prognostischer Wert. ROFO-FORTSCHR RONTG 2010. [DOI: 10.1055/s-0030-1252905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Lücke C, Cynrim C, Herz F, Foldyna B, Schindler K, Grothoff M, Nitzsche S, Gutberlet M, Lehmkuhl L. Einfluss von EKG-Qualitäten auf die Strahlendosis der prospektiv getriggerten Computertomographie des Herzens. ROFO-FORTSCHR RONTG 2010. [DOI: 10.1055/s-0030-1252626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Doenst T, Huether J, Nitzsche S, Gutberlet M, Mohr FW. CMR-based quantification of basal myocardial scar as predictor of functional improvement after left ventricular surgical ventricular reconstruction. Thorac Cardiovasc Surg 2010. [DOI: 10.1055/s-0029-1246844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Lehmkuhl L, Grothoff M, Nitzsche S, Thiele H, Schuler G, Mohr FW, Gutberlet M. Computertomographie des Herzens. Dtsch Med Wochenschr 2009; 134:993-7. [DOI: 10.1055/s-0029-1222557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Fleischer A, Hoffmann J, Grothoff M, Lehmkuhl L, Nitzsche S, Gutberlet M. Evaluation der linksventrikulären Funktion bei Patienten mit kongenital korrigierter Transposition der großen Arterien (L-TGA), nach Vorhofumkehr-OP (D-TGA) und bei einem Normalkollektiv mit der MRT. ROFO-FORTSCHR RONTG 2009. [DOI: 10.1055/s-0029-1221610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Nitzsche S, Lehmkuhl L, Grothoff M, Hilbert S, Hindricks G, Gutberlet M. Untersuchungen der Bildqualität verschiedener Kardio-CT-Protokolle zur Dosisminimierung bei der präinterventionellen Diagnostik der Vorhofanatomie. ROFO-FORTSCHR RONTG 2009. [DOI: 10.1055/s-0029-1221285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Hassler C, Nitzsche S, Iversen C, Zweifel C, Stephan R. Characteristics of Staphylococcus hyicus strains isolated from pig carcasses in two different slaughterhouses. Meat Sci 2008; 80:505-10. [DOI: 10.1016/j.meatsci.2008.02.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2007] [Revised: 01/27/2008] [Accepted: 02/02/2008] [Indexed: 10/22/2022]
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Fleischer A, Hoffmann J, Schindler K, Nitzsche S, Grothoff M, Abdul-Khaliq H, Berger F, Gutberlet M. Kernspintomographische Ventrikelvolumetrie und Funktionsanalyse bei der kongenital korrigierten TGA (L-TGA). ROFO-FORTSCHR RONTG 2008. [DOI: 10.1055/s-2008-1073490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Lücke C, Schindler K, Nitzsche S, Lembcke A, Schuler G, Thiele H, Kivelitz D. Prävalenz der lipomatösen Metaplasie nach Myokardinfarkt. ROFO-FORTSCHR RONTG 2007. [DOI: 10.1055/s-2007-977011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Schindler K, Lücke C, Nitzsche S, Lembcke A, Schuler G, Thiele H, Kivelitz D. Nachweis linksventrikulärer Thromben mittels Magnetresonanztomographie (MRT) des Herzens bei Patienten mit akutem ST-Strecken-Hebungs-Infarkt (STEMI) im Vergleich zur transthorakalen Echokardiographie. ROFO-FORTSCHR RONTG 2007. [DOI: 10.1055/s-2007-977013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Nitzsche S, Zweifel C, Stephan R. Phenotypic and genotypic traits of Staphylococcus aureus strains isolated from pig carcasses. Vet Microbiol 2006; 120:292-9. [PMID: 17141430 DOI: 10.1016/j.vetmic.2006.10.027] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2006] [Revised: 10/19/2006] [Accepted: 10/20/2006] [Indexed: 12/17/2022]
Abstract
A total of 142 S. aureus strains isolated from pig carcasses from abattoirs A (n=98) and B (n=44) were characterized by phenotypic and genotypic traits. Phenotypically, 96% showed yellow-pigmented colonies, 63% beta/delta hemolysis, 85% were egg yolk-positive and 99% were positive for clumping factor/protein A. Only 25% of the strains were resistant to the antimicrobials tested (abattoir A: 19%; abattoir B: 39%), especially to penicillin and ampicillin. None of the strains harbored the mecA gene, which is conserved in methicillin-resistant S. aureus. The biofilm associated genes icaA, icaD and bap were present in 100%, 100% and 0% of the strains. Genes for staphylococcal enterotoxin (SE) were detected in 51% (abattoir A) and 14% of the strains (abattoir B). Among strains harboring SE genes (n=56), 63%, 31%, 4% and 2% tested positive for seg/sei, seg, sei and sec, respectively. The amplification of the 3' end of the coagulase gene (coa) yielded amplicons of 400, 436, 602, 682 or 776bp. Coa restriction profile (CRP) analysis using HaeIII resulted in seven patterns (a-d, e1-e3). CRP (c) was detected most frequently at both abattoirs, whereas CRP (a) was restricted to abattoir A and CRP (e3) to abattoir B. In the slaughter process (abattoir B), (i) two CRPs (b and d) were only found before dehairing/singeing, and (ii) four CRPs (c, e1-e3) were identified throughout the process. The genotyping revealed a remarkable homogeneity in S. aureus strains from the two different abattoirs and the slaughter process stages. These results may be explained by the distribution of a limited number of S. aureus genotypes in the pig population. Moreover, as the predominant CRPs (c, e1-e3) persisted throughout the slaughter process in abattoir B, it may be hypothesized that these types are characterized by colonization advantages.
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Affiliation(s)
- S Nitzsche
- Institute for Food Safety and Hygiene, Vetsuisse Faculty University of Zurich, Winterthurerstr. 272, CH-8057 Zurich, Switzerland
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Scheinert D, Krankenberg H, Schmidt A, Gummert JF, Nitzsche S, Scheinert S, Bräunlich S, Sorge I, Krakor R, Biamino G, Schuler G, Mohr FW. Endoluminal stent–graft placement for acute rupture of the descending thoracic aorta. Eur Heart J 2004; 25:694-700. [PMID: 15084375 DOI: 10.1016/j.ehj.2004.02.022] [Citation(s) in RCA: 100] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2003] [Revised: 02/09/2004] [Accepted: 02/19/2004] [Indexed: 11/15/2022] Open
Abstract
AIMS To investigate the results of endovascular stent-graft placement for the treatment of acute perforating lesions of the descending thoracic aorta. METHODS AND RESULTS A total of 31 consecutive patients underwent interventional treatment for perforating lesions of the descending aorta. In 21 cases (group A), the aortic perforation was due to rupture of a descending thoracic aneurysm or dissection, whereas 10 patients (group B) were treated for traumatic transection of the descending aorta. A total of 42 endoprostheses were implanted. The implantation procedure was successful in all cases without peri-interventional complications. In one case, implantation of a second endoprosthesis became necessary due to type I endoleak. Overall, the 30-day mortality was 9.7%. As all three deaths occurred in group A, the mortality rate in this group was 14.3% versus 0% in group B. Similarly, postinterventional complications were more prevalent, with 28.6% in group A (renal failure n = 4; stroke n = 2) versus 10.0% in group B (renal failure n = 1). No paraplegia and no further deaths or ruptures occurred during follow-up (mean 17 months). CONCLUSION Interventional stent-graft placement is an effective treatment option for the emergency repair of descending aortic perforations.
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Affiliation(s)
- D Scheinert
- Department of Medicine/Cardiology, Clinical and Interventional Angiology, University of Leipzig - Heart Centre, Strümpellstr. 39, 04289 Leipzig, Germany.
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Janssen K, Eichhorn-Grombacher U, Schlink K, Nitzsche S, Oesch F, Kaina B. Long-time expression of DNA repair enzymes MGMT and APE in human peripheral blood mononuclear cells. Arch Toxicol 2001; 75:306-12. [PMID: 11548124 DOI: 10.1007/s002040100226] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The DNA repair enzymes O6-methylguanine-DNA methyltransferase (MGMT) and apurinic/apyrimidinic endonuclease (APE, also known as Ref-1) play an important role in cellular defense against the mutagenic and carcinogenic effects of DNA-damaging agents. Cells with low enzyme activity are more sensitive to induced DNA damage and may confer a higher carcinogenic risk to the individuals in question. To study the level of variability of MGMT and APE expression in human, we analyzed in a long-time study MGMT and APE expression in peripheral blood mononuclear cells (PBMC) from healthy individuals. The data revealed high inter- and intraindividual variability of MGMT but not of APE. For MGMT, the interindividual levels ranged from 27 to 204 fmol/10(6) cells (7.6-fold, 40 healthy individuals). The intraindividual variation was determined by measuring MGMT repeatedly over 42 days, and was found to vary from 1.4-fold to 3.5-fold. Averaging over the measurement period, some individuals displayed low MGMT activity compared to others. In contrast, APE expression showed only a 2.9-fold difference between individuals and a 1.2 to 2.3-fold intra-individual long-time variation, and thus was less variable than MGMT. MGMT and APE expression were not correlated. Overall the results showed variable MGMT and rather constant APE levels in PBMC of healthy individuals measured over a long period.
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Affiliation(s)
- K Janssen
- Biochemical Institute for Environmental Carcinogens, Prof. Dr. G. Grimmer-Foundation, Grosshansdorf, Germany.
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Affiliation(s)
- S Nitzsche
- Abteilung Rheumatologie, Medizinische Klinik und Poliklinik IV, Universität Leipzig
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Pietzsch I, Julius U, Nitzsche S, Hanefeld M. Increased cholesterol ester transfer protein (CETP) activity modulates composition and metabolic clearance of HDL in insulin resistant states. Atherosclerosis 1999. [DOI: 10.1016/s0021-9150(99)80236-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Schlink K, Janssen K, Nitzsche S, Gebhard S, Hengstler JG, Klein S, Oesch F. Activity of O6-methylguanine DNA methyltransferase in mononuclear blood cells of formaldehyde-exposed medical students. Arch Toxicol 1999; 73:15-21. [PMID: 10207610 DOI: 10.1007/s002040050581] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
A recent study reported that exposure of student embalmers in Cincinnati to high concentrations of formaldehyde (2 mg/m3) reduced the activity of the DNA repair protein O6-methylguanine DNA methyltransferase (MGMT). Reduction in a DNA repair enzyme may strongly increase the cancer risk not only with respect to the repair-enzyme causing agent but with respect to all carcinogens causing lesions subject to repair by the enzyme in question. Thus, we examined whether formaldehyde exposure of 57 medical students during their anatomy course at two different Universities in Germany influenced MGMT activity in mononuclear blood cells. Mean formaldehyde exposure of 41 students was 0.2 +/- 0.05 mg/m3 for 6 h per week. MGMT activity was 133.2 +/- 14.9 fmol MGMT/10(6) cells before the beginning of the formaldehyde exposure, 131.1 +/- 15.8 fmol MGMT/10(6) cells after 50 days (P = 0.56) and 128.2 +/- 19.0 fmol MGMT/10(6) cells after 111 days of exposure (P = 0.92). Similarly, no significant influence of formaldehyde exposure was observed, when smoking habits, alcohol consumption, allergic disease and sex of students were considered. In addition no significant difference was obtained in MGMT activity between 16 students with mean formaldehyde exposure of 0.8 +/- 0.6 mg/m3 and students without formaldehyde exposure (n = 51; P = 0.37). In conclusion, exposure of the medical students in western Europe to formaldehyde did not decrease MGMT activity in mononuclear blood cells.
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Affiliation(s)
- K Schlink
- Institute of Toxicology, University of Mainz, Germany
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Abstract
The in vivo kinetics of the HDL apolipoproteins (apo) A-I and A-II were studied in six subjects with impaired glucose tolerance (IGT) and six control subjects with normal glucose tolerance (NGT), using a stable isotope approach. During a 12-h primed constant infusion of L-[ring-13C6]-phenylalanine, tracer enrichment was determined in apoA-I and apoA-II from ultracentrifugally isolated HDL. The rates of HDL apoA-I and apoA-II production and catabolism were estimated using a one-compartment model-based analysis. Triglycerides were higher in IGT subjects (1.33 +/- 0.21 vs. 0.84 +/- 0.27 mmol/l, P < 0.05), but were within the normal range. HDL cholesterol and apoA-I levels were significantly lower in subjects with IGT (1.07 +/- 0.15 vs. 1.36 +/- 0.14 mmol/l, P < 0.05; 0.94 +/- 0.10 vs. 1.34 +/- 0.07 g/l, P < 0.01). In IGT subjects, HDL composition was significantly altered, characterized by an increase in HDL triglycerides (4.9 +/- 1.9 vs. 3.2 +/- 1.0%, P < 0.05) and HDL phospholipids (34.7 +/- 2.6 vs. 27.5 +/- 5.8%, P < 0.05) and a decrease in HDL cholesteryl esters (10.1 +/- 2.0 vs. 12.7 +/- 2.9%, P < 0.05) and HDL apoA-I (31.5 +/- 4.4 vs. 43.2 +/- 2.4%, P < 0.05). The mean fractional catabolic rate (FCR) of HDL apoA-I was significantly higher in IGT subjects (0.34 +/- 0.05 vs. 0.26 +/- 0.03 day(-1), P < 0.01), while the HDL apoA-I production rate (PR), as well as the PR and FCR of HDL apoA-II, showed no differences between the two groups. There were significant correlations between HDL apoA-I FCR and the following parameters: HDL apoA-I (r = -0.902, P < 0.001), HDL cholesterol (r = -0.797, P = 0.001), plasma triglycerides (r = 0.743, P < 0.01), HDL triglycerides (r = 0.696, P < 0.01), and cholesterol ester transfer protein activity (r = 0.646, P < 0.01). We observed a strong positive association between increased apoA-I catabolism and insulin (r = 0.765, P < 0.01) and proinsulin (r = 0.797, P < 0.01) concentrations. These data support the hypothesis that the decrease in HDL cholesterol and apoA-I levels in IGT is principally the result of an enhanced apoA-I catabolism. The latter seems to be an early metabolic finding in IGT even when other lipid parameters, especially plasma triglycerides, still appear to be not or only weakly affected.
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Affiliation(s)
- J Pietzsch
- Institute and Policlinic of Clinical Metabolic Research, Medical Faculty Carl Gustav Carus, Technical University, Dresden, Germany
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Pietzsch J, Julius U, Nitzsche S, Gehrisch S, Kostka H, Jaross W, Hanefeld M. 1.P.48 Functional implications of the human lipoprotein lipase Asp9Asn variant: Insights from in vivo kinetic studies. Atherosclerosis 1997. [DOI: 10.1016/s0021-9150(97)88226-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Pietzsch J, Wiedemann B, Julius U, Nitzsche S, Gehrisch S, Bergmann S, Leonhardt W, Jaross W, Hanefeld M. Increased clearance of low density lipoprotein precursors in patients with heterozygous familial defective apolipoprotein B-100: a stable isotope approach. J Lipid Res 1996; 37:2074-87. [PMID: 8906585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
In familial defective apolipoprotein B-100 (FDB) the presence of a mutant apolipoprotein (apo) B-100 (FDB3500Q/W) in LDL markedly reduces their affinity for the LDL receptor, leading to elevated LDL cholesterol levels. However, the hypercholesterolemia in most FDB patients is relatively mild when compared with, e.g., familial hypercholesterolemia (FH). In order to study mechanisms that may partly alleviate the clinical consequences of FDB, we investigated the in vivo kinetics of apoB-100-containing lipoproteins in five FDB heterozygotes (total cholesterol: 7.84 +/- 1.37 mmol/I; total apoB: 1.68 +/- 0.37 g/l; mean +/- SD) and six normolipidemic controls (4.61 +/- 0.62 mmol/l; 0.98 +/- 0.12 g/l) using a stable isotope approach. During and after a 10-12 h primed, constant infusion of either [13C6]phenylalanine or [2H3]leucine, tracer enrichment was determined in apoB-100 from ultracentrifugally isolated VLDL1 (Sf 60-400), VLDL2 (Sf 20-60), IDL (Sf 12-20), LDL1 (Sf 7-12), and LDL2 (Sf 0-7). The rates of apoB-100 production, catabolism, and transfer were estimated by model-based compartmental analysis. The overall fractional catabolic rate (FCR) of IDL apoB-100 in FDB was substantially increased (2.99 +/- 0.68 pools/day vs. 1.70 +/- 0.23 pools/day in controls, P < 0.01). The fractional rate of apoB-100 transfer from IDL to LDL in FDB was decreased (0.97 +/- 0.13 pools/day vs. 1.24 +/- 0.10 pools/day, P < 0.05). The FCR of LDL apoB-100 in FDB was decreased (0.18 +/- 0.07 pools/day vs. 0.56 +/- 0.05 pools/, P < 0.01). Finally, the input rate of LDL apoB-100 in FDB was markedly decreased (9.45 +/- 2.96 mg/kg day1 vs. 15.54 +/- 1.70 mg/kg day1, P < 0.05). Our data suggest that the relatively small increase of LDL concentrations in FDB is due to an increased clearance of LDL precursor particles via the LDL-receptor and apoE-receptors as well as a decreased conversion of IDL to LDL - two mechanisms that distinguish FDB from FH.
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Affiliation(s)
- J Pietzsch
- Institute and Policlinic of Clinical Metabolic Research, Medical Faculty "C.G. Carus', Technical University, Dresden, Germany
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Pietzsch J, Wiedemann B, Julius U, Nitzsche S, Gehrisch S, Bergmann S, Leonhardt W, Jaross W, Hanefeld M. Increased clearance of low density lipoprotein precursors in patients with heterozygous familial defective apolipoprotein B-100: a stable isotope approach. J Lipid Res 1996. [DOI: 10.1016/s0022-2275(20)37290-4] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Pietzsch J, Subat S, Nitzsche S, Leonhardt W, Schentke KU, Hanefeld M. Very fast ultracentrifugation of serum lipoproteins: influence on lipoprotein separation and composition. Biochim Biophys Acta 1995; 1254:77-88. [PMID: 7811751 DOI: 10.1016/0005-2760(94)00171-t] [Citation(s) in RCA: 56] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
A very short run time and small sample volumes in the separation of lipoproteins by preparative ultracentrifugation are needed for several investigations. Recently, a very fast sequential separation method was described that needs only 100 min for one run in a centrifugal field of 625,000 x g. We studied the influence of centrifugal fields of this dimension on lipoprotein separation and lipoprotein particle integrity using a Beckman Optima TLX ultracentrifuge with a TLA-120.2 rotor. Rotor speed (120/90/60/30.10(3) rev./min) and run time (100 min/3 h/6.7 h/27 h) were selected in such a way that the product of centrifugal field and run time remained constant. The first conditions correspond to the very fast ultracentrifugation (VFU) procedure with a centrifugal field of 625,000 x g. Thirty different plasma samples covering a wide range of lipid and protein concentrations were separated in the course of two centrifugal runs at densities of 1.006 and 1.063 kg/l which yielded very-low-density lipoproteins (VLDL), low-density lipoproteins (LDL), and the subnatant of low-density lipoproteins, including high-density lipoproteins (HDL) and concomitant sedimented plasma proteins. The major lipid components of the lipoproteins, triacylglycerols, free and esterified cholesterol, phospholipids and the apolipoproteins B and A-I, were estimated considering the masses of the tube contents after a slicing procedure. Measurements of lipids and proteins showed a very good recovery of better than 94% and 91%, respectively, and precision-within-series (coefficient of variation) of better than 4.2% and 6.5%, respectively. The effects of the rotor speed on the lipoprotein structure appeared to be weak. With increasing rotor speed, VLDL and LDL lipid constituents principally tended to decrease, whereas they increased in the subnatant of the LDL-run. The mean lipoprotein mass composition, considering the mass percentage of each measured particle constituent, did not show significant alterations. Total protein decreased in VLDL and in LDL and increased in the subnatant of the LDL-run. As checked by an enzyme-linked immunosorbent assay (ELISA) and sodium dodecyl sulphate-polyacrylamide gel electrophoresis (SDS-PAGE), the protein effects were due to nearly complete disappearance of contaminating plasma proteins, especially albumin as the major contamination of VLDL and LDL. The apolipoproteins (apo) B-100, A-I, E and C-I to C-III remained nearly unaffected. The main advantages of VFU were the very short run time (cumulative flotation time is 3.4 h) and the elemination of albumin without repeated runs. The procedure was suitable for the assessment of lipid and protein constituents in lipoproteins from very small plasma samples (500 microliters).
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Affiliation(s)
- J Pietzsch
- Department of Clinical Metabolic Research, Medical Faculty C.G. Carus, Technical University Dresden, Germany
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Pietzsch J, Subat S, Nitzsche S, Leonhardt W, Hanefeld M. Very fast ultracentrifugation (VFU) of plasma lipoproteins. Atherosclerosis 1994. [DOI: 10.1016/0021-9150(94)93878-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Leonhardt W, Pietzsch J, Nitzsche S. Very-fast ultracentrifugation of human plasma lipoproteins: influence of the centrifugal field on lipoprotein composition. Clin Chim Acta 1994; 224:21-32. [PMID: 8174275 DOI: 10.1016/0009-8981(94)90117-1] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
A short run-time in separation of lipoproteins by preparative ultracentrifugation is desirable for several reasons. Recently, a method was described that needs only 100 min for one run in a centrifugal field of 625,000 x g. It is assumed that lipoprotein separation depends on the rotor speed but this has not been systematically studied in centrifugal fields of this order. We performed such a study. Rotor speeds of 120, 90, 60 and 30 x 10(3) rev./min and run-times of 100 min, 3 h, 6.7 h and 27 h were selected in such a way that the product of centrifugal field and run-time remained constant. The first conditions correspond to the 'very fast ultracentrifugation' (VFU) procedure with a centrifugal field of 625,000 x g. The Optima tabletop ultracentrifuge, the rotor TLA-120.2 and thick wall open tubes for 1 ml were used. Thirteen different plasma samples covering a wide range of cholesterol and triglyceride concentrations were separated into VLDL, LDL and HDL in the course of two centrifugal runs at densities of 1.006 and 1.063. The constituents of the lipoproteins were calculated considering the mass of the tube contents after slicing. Recoveries of cholesterol, triglycerides and protein were 97%, 98% and 90%, respectively. The influence of the rotor speed on the apparent composition of the lipoproteins was small. With increasing rotor speed, VLDL-cholesterol became higher (by 14%, P < 0.001), VLDL-triglyceride became lower (by 6%, P < 0.012), LDL-cholesterol became lower (by 9%, P < 0.000). The effects on LDL-triglyceride and on HDL-cholesterol and HDL-triglyceride, did not reach statistical significance. Protein in VLDL and in LDL decreased and increased in 'HDL' (the subnatant of the LDL run). As checked by SDS-PAGE the protein effects were due to complete disappearance of albumin from VLDL and LDL while the apolipoproteins B-100, E and C-I to C-III remained unaffected. It is concluded that the main advantages of VFU are the short run-time and the disappearance of albumin from VLDL and LDL. The other compositional changes need to be further investigated.
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Affiliation(s)
- W Leonhardt
- Department of Metabolic Diseases, Medical Faculty of the Technical University, Dresden, Germany
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Nitzsche S, Wick M. Kunststoff-Tagung. Angew Chem Int Ed Engl 1957. [DOI: 10.1002/ange.19570691517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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