| 1. |
- Schael, S., et al.
(författare)
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Electroweak measurements in electron positron collisions at W-boson-pair energies at LEP
- 2013
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Ingår i: Physics Reports. - : Elsevier BV. - 0370-1573 .- 1873-6270. ; 532:4, s. 119-244
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Forskningsöversikt (refereegranskat)abstract
- Electroweak measurements performed with data taken at the electron positron collider LEP at CERN from 1995 to 2000 are reported. The combined data set considered in this report corresponds to a total luminosity of about 3 fb(-1) collected by the four LEP experiments ALEPH, DELPHI, 13 and OPAL, at centre-of-mass energies ranging from 130 GeV to 209 GeV. Combining the published results of the four LEP experiments, the measurements include total and differential cross-sections in photon-pair, fermion-pair and four-fermion production, the latter resulting from both double-resonant WW and ZZ production as well as singly resonant production. Total and differential cross-sections are measured precisely, providing a stringent test of the Standard Model at centre-of-mass energies never explored before in electron positron collisions. Final-state interaction effects in four-fermion production, such as those arising from colour reconnection and Bose Einstein correlations between the two W decay systems arising in WW production, are searched for and upper limits on the strength of possible effects are obtained. The data are used to determine fundamental properties of the W boson and the electroweak theory. Among others, the mass and width of the W boson, m(w) and Gamma(w), the branching fraction of W decays to hadrons, B(W -> had), and the trilinear gauge-boson self-couplings g(1)(Z), K-gamma and lambda(gamma), are determined to be: m(w) = 80.376 +/- 0.033 GeV Gamma(w) = 2.195 +/- 0.083 GeV B(W -> had) = 67.41 +/- 0.27% g(1)(Z) = 0.984(-0.020)(+0.018) K-gamma - 0.982 +/- 0.042 lambda(gamma) = 0.022 +/- 0.019. (C) 2013 Elsevier B.V. All rights reserved.
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| 2. |
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| 3. |
- Björck, Martin, et al.
(författare)
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Plasminogen Activator Inhibitor-1 Levels and Activity Decrease After Intervention in Patients with Critical Limb Ischaemia
- 2013
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Ingår i: European Journal of Vascular and Endovascular Surgery. - : Elsevier BV. - 1078-5884 .- 1532-2165. ; 46:2, s. 214-222
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Tidskriftsartikel (refereegranskat)abstract
- Patients with peripheral arterial occlusive disease (PAOD), in particular critical limb ischaemia (CLI), carry a high risk of thrombotic events. We hypothesised that patients undergoing conservative, endovascular, or open surgical treatment for CLI have increased levels of plasminogen activator inhibitor-1 (PAI-1), leading to a prothrombotic state. The objective was to determine levels of PAI-1 in patients with acute or chronic PAOD/CLI. Thirty-two patients with a median age of 74 (49–90) years were included. Three underwent thrombolysis for acute limb-threatening ischaemia. Twenty-six patients with chronic ischaemia received endovascular (n = 20) or open (n = 6) surgical treatment. Three were treated conservatively. Biomarkers and ankle brachial index (ABI) were measured before and up to 1 month after intervention. Patency was studied with repeated duplex ultrasound. Ankle pressure and ABI improved after intervention (p < .001). C-reactive protein (CRP) increased from a median of 7.90 mg/L at baseline to 31.5 on day 1 (p < .001), 28.0 on day 6 (p < .001), and returned to baseline levels on day 30. PAI-1 antigen and activity decreased from day 6 and onwards post-intervention compared with baseline (p < .05). A great individual variability in PAI-1 antigen and activity was observed. Although most actively treated patients had normal PAI-1 activity, 11/29 (38%) were above that level of normality at baseline, 10/24 (42%) on day 1, 3/23 (13%) on day 6, and 5/27 (19%) on day 30 after intervention. Endovascular and open surgical treatment resulted in improved ankle pressure and ABI. The intervention was followed by a transient increase in CRP and a sustained reduction in PAI-1 levels and activity.
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| 4. |
- Skagius, Elisabet, et al.
(författare)
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Percutaneous Closure of Large Femoral Artery Access with Prostar XL in Thoracic Endovascular Aortic Repair
- 2013
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Ingår i: European Journal of Vascular and Endovascular Surgery. - : Elsevier BV. - 1078-5884 .- 1532-2165. ; 46:5, s. 558-563
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Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVES:To investigate the technical success rate of Prostar XL for closure of large (≥20F) femoral vascular access sites in thoracic endovascular aortic repair (TEVAR) procedures.METHODS:This was a single-center consecutive case series. All TEVAR procedures at Uppsala University Hospital 2006-2010 were registered prospectively. Reoperations and cases with open closure technique were excluded. Primary (early) technical failure was defined as closure failure requiring immediate (on-table) open surgical repair; late access-related complication occurred thereafter. The medical records, pre- and postoperative computed tomography images were reviewed retrospectively.RESULTS:A total of 164 TEVAR procedures were identified, of which 118 (71%) had a median 22F (range 20-26F) access site sealed with tandem Prostar XL. The indications for TEVAR were dissection (47%), aneurysm (42%), trauma (8%), and miscellaneous (3%). Median follow-up time was 10 months (range 1-62). Primary technical failure occurred in 10 of 118 (8%). These cases were converted to cut-downs and surgical repair (n = 7), femoral fascia suturing (n = 2), and external compression with the Femo-Stop device (n = 1). Hypertension was associated with primary failure (p = .005), and a trend was observed for high age (p = .078) and increased groin subcutaneous fat layer (p = .077). Late access-related complications included pseudo-aneurysms (n = 12), small hematomas (n = 7), superficial groin infections (n = 2), and deep venous thrombosis (n = 1). None of the late complications required surgical treatment.CONCLUSIONS:The access closure technique with tandem Prostar XL for large access sites during TEVAR is safe, in experienced hands. Few technical failures and few late complications occur, and they are usually benign.
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| 5. |
- Steuer, Johnny, et al.
(författare)
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Distinction between Acute and Chronic Type B Aortic Dissection : Is there a Sub-acute Phase?
- 2013
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Ingår i: European Journal of Vascular and Endovascular Surgery. - : Elsevier BV. - 1078-5884 .- 1532-2165. ; 45:6, s. 627-631
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Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVES:This study aims to assess the relevance of the definition of acute dissection, to analyse whether there is a sub-acute phase and to determine early outcome of thoracic endovascular aortic repair (TEVAR) in acute complicated type B aortic dissection.DESIGN:Dual-centre consecutive case series.MATERIALS:Between 1999 and 2011, 102 patients underwent TEVAR for non-traumatic acute complicated type B dissection in Zurich, Switzerland, and Uppsala, Sweden. In addition, 22 patients treated for an acute dissection-related complication occurring >14 days after onset of symptoms were included. Median age was 68 years, 35% were women.METHODS:Demographic, procedural and outcome data were collected prospectively. The patients were followed up on 1 January 2012.RESULTS:In the 22 sub-acute patients (18%), there were no early deaths or neurological complications. The predominant complication in these patients was rapid aortic enlargement, whereas rupture was more prevalent in patients treated within 14 days. In total, there were nine (7%) early deaths, three (2%) post-intervention paraplegias and six cases of stroke (5%).CONCLUSIONS:TEVAR was performed with low early mortality and few neurological complications. A significant proportion of patients presented with acute complications >14 days after onset of symptoms, indicative of a sub-acute phase in the transition between acute and chronic dissection, questioning the relevance of the current definition.
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