Search results for "DERIVATION"
showing 10 items of 60 documents
Derivation and Validation of a Chronic Total Coronary Occlusion Intervention Procedural Success Score From the 20,000-Patient EuroCTO Registry
2019
Abstract Objectives The aim was to establish a contemporary scoring system to predict the outcome of chronic total occlusion coronary angioplasty. Background Interventional treatment of chronic total coronary occlusions (CTOs) is a developing subspecialty. Predictors of technical success or failure have been derived from datasets of modest size. A robust scoring tool could facilitate case selection and inform decision making. Methods The study analyzed data from the EuroCTO registry. This prospective database was set up in 2008 and includes >20,000 cases submitted by CTO expert operators (>50 cases/year). Derivation (n = 14,882) and validation (n = 5,745) datasets were created to develop a …
Beurteilung der Durchgängigkeit von koronaren Bypassgefäßen mit einer 2D T2-gewichteten Turbo-Spin-Echo-Sequenz (HASTE) in Atemanhaltetechnik
1999
AIM To evaluate the patency of coronary artery bypass grafts with a 2D T2-weighted breath-hold turbo-spin-echo sequence. METHODS 38 patients with 97 grafts (19 internal mammary artery and 78 saphenous vein grafts) and a total of 120 distal anastomoses were studied at 1.5 Tesla in supine position using a phased array body coil. An ECG gated 2D T2-weighted breath-hold turbo-spin-echo sequence (HASTE) was performed. Reference method was selective coronary angiography. The image material was evaluated independently by two radiologists (observer one, a radiological fellow and the second a staff radiologist). RESULTS Observer 1 reached a sensitivity of 96% (72/75) and a specificity of 91% (20/22)…
A noninvasive postoperative clinical score to identify patients at risk for postoperative pulmonary complications: The air-test score
2020
BACKGROUND: Postoperative pulmonary complications (PPCs) negatively affect morbidity, healthcare costs and postsurgical survival. Preoperative and intraoperative peripheral oxyhemoglobin saturation (SpO2) levels are independent risk factors for postoperative pulmonary complications (PPCs). The air-test assesses the value of SpO2 while breathing room-air. We aimed at building a clinical score that includes the air-test for predicting the risk for PPCs. METHODS: This is a development and validation study in patients -randomly divided into two cohorts- from a large randomized clinical trial (iPROVE) that enrolled 964 intermediate-to-high risk patients scheduled for abdominal surgery. Arterial …
Angiographic follow-up results of a randomized study on angioplasty versus bypass surgery (GABI Trial)
1996
Although several randomized trials have been performed to compare the outcomes of percutaneous transluminal coronary angioplasty (PTCA) and coronary artery bypass surgery (CABG) in patients with multivessel disease, there is little data available on angiographic follow-up results. The present substudy of the German angioplasty versus bypass surgery investigation (GABI Trial) compares the angiographic revascularization status in these two cases 6 months after treatment. Follow-up angiograms were available in 102 CABG patients and 117 PTCA patients. Although the protocol excluded patients with total occlusion, on follow-up 6 months after treatment we found total occlusion of 94 native arterie…
The radial artery is larger than the ulnar.
2003
The radial artery is presently widely used as a bypass graft for coronary artery reconstruction. However, the traditional opinion that the ulnar artery is the larger forearm artery has been questioned.The internal diameters of the radial and ulnar arteries were measured at the wrist in postmortem angiograms of 24 cadavers. Differences in mean values of variables between ulnar and radial arteries were analyzed using the Wilcoxon test.The mean diameter of the radial artery was 28% larger than that of the ulnar artery in the right arm (p0.001) and 26% larger in the left arm (p0.001). In the right arm the radial artery was dominant in 20 of 24 cadavers (83%), the ulnar artery in 3 of 24 (13%), …
A note on *-derivations of partial *-algebras
2012
A definition of *-derivation of partial *-algebra through a sufficient family of ips-forms is proposed.
Embeddings of Danielewski hypersurfaces
2008
In this thesis, we study a class of hypersurfaces in $\mathbb{C}^3$, called \emph{Danielewski hypersurfaces}. This means hypersurfaces $X_{Q,n}$ defined by an equation of the form $x^ny=Q(x,z)$ with $n\in\mathbb{N}_{\geq1}$ and $\deg_z(Q(x,z))\geq2$. We give their complete classification, up to isomorphism, and up to equivalence via an automorphism of $\mathbb{C}^3$. In order to do that, we introduce the notion of standard form and show that every Danielewski hypersurface is isomorphic (by an algorithmic procedure) to a Danielewski hypersurface in standard form. This terminology is relevant since every isomorphism between two standard forms can be extended to an automorphism of the ambiant …
Derivation in Finnish upper secondary school English L2 textbooks
2016
Sananmuodostus on keskeinen taito kielten oppijalle; se auttaa paitsi sanavaraston laajentamisessa, myös edistää oppijan lukutaitoa vieraskielistä tekstiä lukiessa. Tästä syystä on tärkeää tarkastella, kuinka sananmuodostusta opetetaan viimeistään toisen asteen opetuksessa, esimerkiksi lukiossa. Tässä tutkimuksessa tarkastelukeinoksi valikoitui lukiotason oppikirjojen tutkiminen, koska erityisesti kielten opetuksessa oppikirjoilla on todella suuri rooli opetuksen sisältöjä ja muotoa koskevia valintoja tehtäessä. Tavoitteena oli selvittää, kuinka lukiotason oppikirjoissa opetetaan sananmuodostamisen tuottoisinta osa-aluetta, sananjohtamista, ja erityisesti millaisia sitä käsitteleviä harjoit…
Word Order Typology and the Minimalist Program: What Do Parameters Belong To?
2019
One of the problems related with the word order and word order typology is connected with derivation obtaining in the narrow syntax and the conditions responsible for the Full Interpretation requirement at LF as well as at PF. If it is assumed that linearization as defined in Kayne (1994) is the reflexion of the asymmetric character of syntax at PF, then it is worth analysing which properties of the syntactic derivation within the narrow syntax are reflected at PF and which configurations seen on the surface are the results of PF conditions. In other words it would be interesting to determine the boundary between the factors responsible for the configuration of syntactic constituents obtain…
Warczeć, zipać, krzyczeć - czasowniki nie tylko dźwiękonaśladowcze i ich potencjał słowotwórczy
2018
The article is a tentative analysis of the word-forming potential for Polish not only onomatopoeic verbs. As the input material for analysis, the author selected 84 word-forming nests of verbs, taken from Słownik gniazd słowotwórczych współczesnego języka ogólnopolskiego (Kraków 2004). The selected verbs are the base for nouns, verbs, adjectives, adverbs. The derived nouns and verbs were divided into 23 semantic classes. The analysis of word-forming paradigms showed that onomatopoeic verbs quite regularly will derive verbs accentuating the beginning or the end of the action; verbs expressing intensity or weakening of the action; verbs naming reactions; there will also be nouns as names of a…