Ernst Weigang, Jack Parker, Martin Czerny, Lars Lönn, Robert S. Bonser, Thierry Carrel, Carlos A. Mestres, Roberto Di Bartolomeo, Marc Schepens, Jean Bachet, Christian‐Friedrich Vahl, Martin Grabenwöger,
Thoracic endovascular aortic repair (TEVAR) has emerged as a promising therapeutic alternative to conventional open aortic replacement but it requires suitable proximal and distal landing zones for stent-graft anchoring. Many aortic pathologies affect in the immediate proximity of the left subclavian artery (LSA) limiting the proximal landing zone site without proximal vessel coverage. In patients in whom the distance between the LSA and aortic lesion is too short, extension of the landing zone can ...
Tópico(s): Aortic aneurysm repair treatments
2011 - Oxford University Press | European Journal of Cardio-Thoracic Surgery
Biruta Witte, Christian Stenz, Christian F. Vahl, Martin Huertgen,
To compare the video-assisted thoracoscopic surgery (VATS) with the open thoracotomy access to pulmonary segmentectomy by the clinical outcomes and long-term survival in lung carcinoma. Non-randomized comparative intention-to-treat study of prospective institutional registry data and survival data of 100 consecutive patients undergoing segmentectomy. Within one decade (2002–12), 100 patients with proven or highly suspected lung carcinoma underwent 100 anatomical sub-lobar pulmonary resections (52 typical ...
Tópico(s): Lung Cancer Treatments and Mutations
2015 - Oxford University Press | Interactive Cardiovascular and Thoracic Surgery
Eva Kristiansen, Martin Vahl, Ole Ladefoged, Otto Meyer, Grete Østergaard, Henrik Rye Lam,
... 00).Search for more papers by this authorMartin Vahl, Martin Vahl Institute of Food Chemistry and Nutrition, National ... 00).Search for more papers by this authorMartin Vahl, Martin Vahl Institute of Food Chemistry and Nutrition, National Food ...
Tópico(s): Regulation of Appetite and Obesity
1994 - Wiley | Pharmacology & Toxicology
... to the Study of Plant Communities. Eug. Warming, Martin Vahl Henry C. CowlesHenry C. CowlesPDFPDF PLUS Add to ...
Tópico(s): Bryophyte Studies and Records
1909 - University of Chicago Press | Botanical Gazette
Kit Granby, Steinar Johannesen, Martin Vahl,
A fast and specific method for the determination of glyphosate in cereals is described. The method is based on extraction with water by ultrasonication. The samples are cleaned up and separated by high-performance liquid chromatography on a polystyrene-based reverse-phase column (clean-up) in series with an ion chromatography column (separation) using NaHCO(3) as eluent. A micro-membrane suppressor was inserted after the separator column to remove the Na(+) ions before detection by electrospray ionization ...
Tópico(s): Pesticide Residue Analysis and Safety
2003 - Taylor & Francis | Food Additives & Contaminants
Erik H. Larsen, Marianne Hansen, Teresa W.‐M. Fan, Martin Vahl,
Cation and anion exchange HPLC were used to separate a mixture of 12 selenium species comprising selenoamino acids, selenonium ions and inorganic selenium. The cationic species were separated from each other and from the co-injected anions using a cation exchange column with gradient elution by aqueous pyridinium formate at pH⊕∼3 as the mobile phase. The anionic species were separated using an anion exchange column with isocratic elution by an aqueous salicylate–TRIS mobile phase at pH 8.5. The ...
Tópico(s): Thallium and Germanium Studies
2001 - Royal Society of Chemistry | Journal of Analytical Atomic Spectrometry
Click to increase image sizeClick to decrease image sizeKeywords: Glyphosate Ampa Chlormequat Mepiquat Lc-MS Cereals Grain
Tópico(s): Pesticide Residue Analysis and Safety
2001 - Taylor & Francis | Food Additives & Contaminants
Florian Gembardt, Sonja Grajewski, Martin Vahl, Heinz‐Peter Schultheiss, Thomas Walther,
Tópico(s): Coagulation, Bradykinin, Polyphosphates, and Angioedema
2008 - Springer Science+Business Media | Molecular and Cellular Biochemistry
Abstract The objective of the present work was to establish information on chlormequat and mepiquat residues in grain for human consumption. Chlormequat (2- chloro-N,N,N-trimethylethylammonium, CAS RN 7003-89-6) and mepiquat (1,1-dimethylpiperid- inium, CAS RN 15302-91-7) are plant growth regulators used to stabilize stalks in cereals. The study was part of the Danish National Pesticide Survey, managed by the Danish Veterinary and Food Administration. Samples were collected in autumn 1997. Residue ...
Tópico(s): Pesticide and Herbicide Environmental Studies
1999 - Oxford University Press | Journal of AOAC International
A liquid chromatography electrospray tandem mass spectrometric (LC/MS/MS) method is described for analysis and confirmation of ochratoxin A in pig kidney and rye flour using derivatization of ochratoxin A to the methyl ester. Ochratoxin A methyl(d3)ester is used as internal standard. The method works well, the detection limit is 0.02 microgram/kg and the repeatability (coefficient of variation) is between 6% and 16% in the contamination range 0.5 to 8 micrograms/kg.
Tópico(s): Meat and Animal Product Quality
1999 - Taylor & Francis | Food Additives & Contaminants
Martin Vahl, Anette Graven, Ren x E K. Juhler,
Tópico(s): Insect and Pesticide Research
1998 - Springer Science+Business Media | Fresenius Journal of Analytical Chemistry
A sensitive gas‐chromatographic method of analysis using mass specific detection has been applied to a study of ethyl carbamate in the Danish diet. Beverages and foods which were assumed to give a major contribution to the exposure of the Danish population to this potentially carcinogenic compound were investigated. Average values, ranges obtained for concentrations of ethyl carbamate and the number of analyses were 534 μg/l (<5–5000 μg/l, n = 22) in spirits, 30 μg/l (7–61 μg/l, n =14) in fortified wines, ...
Tópico(s): Muscle metabolism and nutrition
1993 - Taylor & Francis | Food Additives & Contaminants
Preben Aagaard Nielsen, Martin Vahl, J. Gry,
Ground lean pork was formed into patties and fried under ordinary conditions making sure that the crust was not charred. No fat was added when frying. The meat was fried at pan temperatures of 200 degrees C, 250 degrees C, and 300 degrees C until the temperature at the centre of the patties was either 65 degrees C or 70 degrees C. The crust was extracted with aqueous acid followed by concentration of the mutagens on an XAD-2 column and elution with acetone. The total mutagenic activity and high- ...
Tópico(s): Mycotoxins in Agriculture and Food
1988 - Springer Science+Business Media | Zeitschrift für Lebensmittel-Untersuchung und -Forschung
Nifursol (3,5-dinitrosalicylic acid (5-nitrofurfurylidene) hydrazide) is mainly used as a feed additive for the prevention of blackhead disease in turkeys. The objective of the present work was to establish information on nifursol residues in turkey and chicken meat. The analytical method was based on conversion of nifursol and its metabolites with an intact 3,5-dinitrosalicylic acid hydrazide (DNSH) side chain to the 2-nitrophenyl analogue of nifursol (NPDNSH) by treatment with dilute hydrochloric ...
Tópico(s): Fungal Plant Pathogen Control
2005 - Taylor & Francis | Food Additives & Contaminants
Kristin S. Clausen, William Thomas Gillis, Richard A. Howard,
... descriptive work of Olaf Swartz (1788Swartz ( -1806) ) and Martin Vahl (1798-1807) and Grisebach's Flora of the ...
Tópico(s): Botany, Ecology, and Taxonomy Studies
1981 - Arnold Arboretum of Harvard University | Journal of the Arnold Arboretum
Stephanie A. Snyder‐Ramos, T. Gruhlke, Harald Bauer, M. Bauer, A. P. Luntz, J. Motsch, Emil Martin, Christian F. Vahl, U. Mißler, Martin Wiesmann, Bernd W. Böttiger,
Although several clinical studies have shown that increased serum concentrations of protein S100B predict ischaemic brain damage after cardiac surgery, S100B may also be released from the heart or other injured tissue. We therefore investigated the correlation between serum S100B levels and those of the specific cardiac marker troponin I in order to assess the cerebral vs. extracerebral origin of S100B. In 64 cardiac surgical patients, serial blood samples were drawn for the measurement of S100B ...
Tópico(s): Traumatic Brain Injury and Neurovascular Disturbances
2004 - Wiley | Anaesthesia
Kerry A. Esquitin, Omar Khalique, Qi Liu, Susheel Kodali, Leo Marcoff, Tamim Nazif, Isaac George, Torsten Vahl, Martin B. Leon, Rebecca T. Hahn,
•Aortic EOA was measured by matching RR intervals in irregular heart rhythms. •AF: Aortic EOA can be measured with a single cycle length, a long cycle is preferred. •FE: The postectopic beat results in a higher transaortic gradient, SV, DVI, and EOA. Introduction In irregular heart rhythms, echocardiographic calculation of aortic effective orifice area (EOA) requires averaging measurements from multiple cardiac cycles. Whether a single cycle length method can be used to calculate aortic EOA in aortic ...
Tópico(s): Cardiac Imaging and Diagnostics
2019 - Elsevier BV | Journal of the American Society of Echocardiography
Shmuel Chen, Björn Redfors, Brian O’Neill, Marie‐Annick Clavel, Philippe Pîbarot, Sammy Elmariah, Tamim Nazif, Aaron Crowley, Ori Ben‐Yehuda, Matthew Finn, Maria Alu, Torsten Vahl, Susheel Kodali, Martin B. Leon, Brian R. Lindman,
B-type natriuretic peptide (BNP) is a cardiac neurohormone that is secreted in response to ventricular volume expansion and pressure overload. There are conflicting data regarding the association between BNP levels and outcomes after transcatheter aortic valve replacement (TAVR). We therefore sought to assess the association between baseline BNP and adverse outcomes in patients with symptomatic, severe aortic stenosis (AS), and left ventricular ejection fraction (LVEF) ≥50%, undergoing TAVR in the PARTNER ...
Tópico(s): Cardiovascular Function and Risk Factors
2019 - Oxford University Press | European Heart Journal
Torsten Vahl, Susheel Kodali, Martin B. Leon,
Transcatheter aortic valve replacement (TAVR) has become a safe and effective therapy for patients with severe aortic stenosis (AS). In recent trials, the hemodynamic performance and clinical outcomes of the latest generation of TAVR devices demonstrated at least parity with surgical outcomes in patients of similar risk. Many initial obstacles with TAVR have largely been overcome, including frequent access site complications and concerns about strokes and paravalvular leaks. Using a multidisciplinary ...
Tópico(s): Cardiac pacing and defibrillation studies
2016 - Elsevier BV | Journal of the American College of Cardiology
Omar Khalique, Todd Pulerwitz, Sandra S. Halliburton, Susheel Kodali, Rebecca T. Hahn, Tamim Nazif, Torsten Vahl, Isaac George, Martin B. Leon, Belinda D’Souza, Andrew J. Einstein,
Transcatheter aortic valve replacement (TAVR) is performed frequently in patients with severe, symptomatic aortic stenosis who are at high risk or inoperable for open surgical aortic valve replacement. Computed tomography angiography (CTA) has become the gold standard imaging modality for pre-TAVR cardiac anatomic and vascular access assessment. Traditionally, cardiac CTA has been most frequently used for assessment of coronary artery stenosis, and scanning protocols have generally been tailored for ...
Tópico(s): Infective Endocarditis Diagnosis and Management
2016 - Elsevier BV | Journal of cardiovascular computed tomography
Nadira Hamid, Omar Khalique, Mark Monaghan, Susheel Kodali, Danny Dvir, Vinayak Bapat, Tamim Nazif, Torsten Vahl, Isaac George, Martin B. Leon, Rebecca T. Hahn,
An increased use of bioprosthetic heart valves has stimulated an interest in possible transcatheter options for bioprosthetic valve failure given the high operative risk. The encouraging results of transcatheter aortic valve implantation in high-risk surgical candidates with native disease have led to the development of the transcatheter valve-in-valve (VIV) procedures for failed bioprostheses. VIV procedures are unique in many ways, and there is an increased need for multimodality imaging in a team- ...
Tópico(s): Aortic Disease and Treatment Approaches
2015 - Elsevier BV | JACC. Cardiovascular imaging
I read with interest this article describing the artifactual nature of the early S100β increases after CPB. In a recent work, we have shown that these exorbitant levels do not derive from cardiac (or other non-CNS) tissue, but rather reflect a cross-reactivity between the antibodies employed for the study [1]. This is an important issue, since it also addresses the question of why putative increases in peripheral S100β occur in the absence of neuronal or cerebrovascular damage. Since the offending ...
Tópico(s): Sepsis Diagnosis and Treatment
2004 - Wiley | Anaesthesia
Lauren S. Ranard, Robert O. Bonow, Rick A. Nishimura, Michael J. Mack, Vinod H. Thourani, Joseph E. Bavaria, Patrick T. O’Gara, Jeroen J. Bax, Philipp Blanke, Victoria Delgado, Jonathon Leipsic, Roberto M. Lang, Héctor I. Michelena, João L. Cavalcante, Torsten Vahl, Martin B. Leon, Vera H. Rigolin,
A global multidisciplinary workshop was convened to discuss the multimodality diagnostic evaluation of aortic regurgitation (AR). Specifically, the focus was on assessment tools for AR severity and analyzing evolving data on the optimal timing of aortic valve intervention. The key concepts from this expert panel are summarized as: 1) echocardiography is the primary imaging modality for assessment of AR severity; however, when data is incongruent or incomplete, cardiac magnetic resonance may be helpful; ...
Tópico(s): Infective Endocarditis Diagnosis and Management
2023 - Elsevier BV | Journal of the American College of Cardiology
Hemal Gada, Ajay J. Kirtane, Kaijun Wang, Yang Lei, Elizabeth A. Magnuson, Matthew R. Reynolds, Mathew Williams, Susheel Kodali, Torsten Vahl, Suzanne V. Arnold, Martin B. Leon, Vinod H. Thourani, Wilson Y. Szeto, David J. Cohen,
Background— In the Placement of AoRTic TraNscathetER Valve (PARTNER) randomized controlled trial (RCT), which represented the first exposure to transapical transcatheter aortic valve replacement (TA-TAVR) for many clinical sites, high-risk patients undergoing TA-TAVR derived similar health-related quality of life (HRQoL) outcomes when compared with surgical aortic valve replacement (SAVR). With increasing experience, it is possible that HRQoL outcomes of TA-TAVR may have improved. Methods and Results— ...
Tópico(s): Cardiac pacing and defibrillation studies
2015 - Lippincott Williams & Wilkins | Circulation Cardiovascular Quality and Outcomes
Omar Khalique, Nadira Hamid, Susheel Kodali, Tamim Nazif, Leo Marcoff, Jean‐Michel Paradis, Mathew Williams, Torsten Vahl, Isaac George, Martin B. Leon, Rebecca T. Hahn,
Background Echocardiographic calculation of effective orifice area (EOA) after transcatheter aortic valve replacement is integral to the assessment of transcatheter heart valve (THV) function. The aim of this study was to determine the most accurate method for calculating the EOA of the Edwards SAPIEN and SAPIEN XT THVs. Methods One hundred intraprocedural transesophageal echocardiograms were analyzed. To calculate the post–transcatheter aortic valve replacement left ventricular outflow tract (LVOT) ...
Tópico(s): Infective Endocarditis Diagnosis and Management
2015 - Elsevier BV | Journal of the American Society of Echocardiography
Tópico(s): Aortic Disease and Treatment Approaches
2001 - Elsevier BV | Journal of the American College of Cardiology
Kurt‐Wolfram Sühs, Н. А. Новоселова, Maike Kuhn, L. C. Seegers, Volkhard Kaever, Kirsten Müller‐Vahl, Corinna Trebst, Thomas Skripuletz, Martin Stangel, Frank Peßler,
The tryptophan-kynurenine-nicotinamide adenine dinucleotide (oxidized; NAD+) pathway is closely associated with regulation of immune cells toward less inflammatory phenotypes and may exert neuroprotective effects. Investigating its regulation in central nervous system (CNS) infections would improve our understanding of pathophysiology and end-organ damage, and, furthermore, open doors to its evaluation as a source of diagnostic and/or prognostic biomarkers.We measured concentrations of kynurenine ( ...
Tópico(s): Gut microbiota and health
2019 - Oxford University Press | The Journal of Infectious Diseases
Marco Martín González‐Chávez, Ángel Josabad Alonso‐Castro, Juan Ramón Zapata‐Morales, Víctor Ermilo Arana‐Argáez, Julio César Torres‐Romero, Yessica Elisa Medina‐Rivera, Ernesto Sánchez‐Mendoza, Salud Pérez‐Gutiérrez,
Salvia tiliifolia Vahl (Lamiaceae) is used for the empirical treatment of pain and inflammation. The diterpenoid tilifodiolide (TFD) was isolated from Salvia tiliifolia. The in vitro anti-inflammatory effects of TFD (0.1-200 µM) were assessed using murine macrophages stimulated with LPS and estimating the levels of pro-inflammatory mediators for 48 h. The in vivo anti-inflammatory activity of TFD was assessed using the carrageenan-induced paw edema test for 6 h. The antinociceptive effects of TFD were ...
Tópico(s): Pain Mechanisms and Treatments
2018 - Wiley | Drug Development Research
Adam Castaño, David L. Narotsky, Nadira Hamid, Omar Khalique, Rachelle Morgenstern, Albert J. DeLuca, Jonah Rubin, Codruța Chiuzan, Tamim Nazif, Torsten Vahl, Isaac George, Susheel Kodali, Martin B. Leon, Rebecca T. Hahn, Sabahat Bokhari, Mathew S. Maurer,
Transthyretin cardiac amyloidosis (ATTR-CA) has been reported in patients with aortic stenosis (AS) but its prevalence and phenotype are not known. We examine elderly patients with severe symptomatic AS undergoing transcatheter aortic valve replacement (TAVR) and determine the prevalence and phenotype of ATTR-CA non-invasively. We performed technetium-99m pyrophosphate (99mTc-PYP) cardiac scintigraphy prospectively on patients who underwent TAVR, to screen for ATTR-CA. Transthoracic echocardiography ...
Tópico(s): Atrial Fibrillation Management and Outcomes
2017 - Oxford University Press | European Heart Journal
Nicolas Bettinger, Omar Khalique, Joseph Krepp, Nadira Hamid, D. Bae, Todd Pulerwitz, Ming Liao, Rebecca T. Hahn, Torsten Vahl, Tamim Nazif, Isaac George, Martin B. Leon, Andrew J. Einstein, Susheel Kodali,
The threshold for the optimal computed tomography (CT) number in Hounsfield Units (HU) to quantify aortic valvular calcium on contrast-enhanced scans has not been standardized. Our aim was to find the most accurate threshold to predict paravalvular regurgitation (PVR) after transcatheter aortic valve replacement (TAVR).104 patients who underwent TAVR with the CoreValve prosthesis were studied retrospectively. Luminal attenuation (LA) in HU was measured at the level of the aortic annulus. Calcium volume ...
Tópico(s): Cardiac Imaging and Diagnostics
2017 - Elsevier BV | Journal of cardiovascular computed tomography