oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Search Results: 1 - 10 of 1732 matches for " Martina Sordi "
All listed articles are free for downloading (OA Articles)
Page 1 /1732
Display every page Item
Feasibility, safety and tolerability of accelerated dobutamine stress echocardiography
Giovanni Minardi, Carla Manzara, Giovanni Pulignano, Paolo G Pino, Herribert Pavaci, Martina Sordi
Cardiovascular Ultrasound , 2007, DOI: 10.1186/1476-7120-5-40
Abstract: Dobutamine stress echocardiography (DSE) is commonly used to assess the extent, location, and severity of coronary artery disease (CAD) and myocardial viability [1-6]. The duration and infusion dose of dobutamine for the assessment of myocardial ischemia and viability has been studied extensively [7-10]. Currently, in patients with suspected or known CAD, most laboratories use stepwise increments of dobutamine at 3-minute intervals, which has evolved from the commonly used exercise treadmill protocols. However, steady-state dobutamine levels during dobutamine infusion are not obtained for up to 10 minutes [5,7,11]. Consequently, the full effect of any infusion rate of dobutamine is not obtained before the dobutamine dose has advanced to the next level [12] and plasma dobutamine concentrations increase rapidly and non-linearly during the test [1,13,14]. Furthermore, previous studies have shown that patients treated with beta-adrenergic antagonists frequently fail to reach target heart rate [15,16]. In these patients, the addition of atropine has been reported to improve the sensitivity of DSE by increasing the heart rate response [17]. Therefore, a continuous infusion of a single high dose of dobutamine has been suggested as a simple and effective protocol of DSE [1,18]. The present study assesses the feasibility, safety, and tolerability of an accelerated dobutamine stress protocol (ADSE) performed in patients with suspected or known CAD.Between March 2002 and October 2007, at San Camillo Hospital, we prospectively enrolled 265 consecutive patients (mean age 63.3 ± 11.6; males 185). All patients underwent ADSE. Demographic and clinical characteristics of patients are reported in Table 1.Indications for ADSE included evaluation of angina (n = 55), atypical chest pain (n = 22), ECG uninterpretable ECG (n = 15), chest pain in hypertensive patients (n = 11), risk stratification after myocardial infarction (n = 180), follow-up of PTCA (percutaneous transluminal coronary
An unusual case of ST-segment elevation myocardial infarction following a late bare-metal stent fracture in a native coronary artery: a case report
Giovanni Minardi, Paolo G Pino, Marco Nazzaro, Herribert Pavaci, Martina Sordi, Cesare Greco, Carlo Gaudio
Journal of Medical Case Reports , 2009, DOI: 10.1186/1752-1947-3-9296
Abstract: We present, to the best of our knowledge, the first documented case of ST-segment elevation myocardial infarction in a patient following a late bare-metal stent fracture and thrombosis in a native coronary artery. The patient, a 51-year-old Caucasian man, was treated successfully with primary percutaneous coronary intervention and a new stent implantation.A coronary stent fracture is a rare complication that has been described in venous bypass grafts deploying either a drug-eluting stent or a bare-metal stent. Stent fractures rarely occur in coronary arteries. In light of the non-specific presentation of stent fracture, it is also an easily missed complication. Patients may present with a non-specific symptom of angina. The angina could either be stable or unstable as a result of restenosis or in-stent thrombosis, or both. Our case demonstrates the most severe consequences of a bare-metal stent fracture (sudden coronary thrombosis and subsequent myocardial infarction) in a native coronary artery. It was diagnosed angiographically and treated early and effectively.A bare-metal stent (BMS) fracture as a cause of acute coronary thrombosis and consequently of acute coronary syndrome (ACS) is a rare clinical event that, to the best of our knowledge, has previously not been reported.A stent fracture is a rare complication of percutaneous coronary intervention (PCI). Drug-eluting stent (DES) fractures have an estimated incidence of 2.7% [1], and a BMS fracture in a saphenous vein graft has recently been described [2]. A late BMS fracture has also been reported, which was detected by 64-slice multidetector computed tomography (MDCT) [3].A 51-year-old Caucasian man who smoked and was afflicted with dyslipidemia presented at our emergency department complaining of typical angina and shortness of breath. He had a family history of coronary artery disease. He had been successfully treated with coronary angioplasty 12 years before presentation. A 4.0/16.0 mm AVE Micro stent (AVE
Caseous calcification of the mitral annulus with mitral regurgitation and impairment of functional capacity: a case report
Giovanni Minardi, Carla Manzara, Giovanni Pulignano, Paolo G Pino, Herribert Pavaci, Martina Sordi, Francesco Musumeci
Journal of Medical Case Reports , 2008, DOI: 10.1186/1752-1947-2-205
Abstract: We report the case of a 69-year-old woman, in whom caseous calcification of the mitral annulus was found at transthoracic echocardiography. Cardiac surgery was performed because of significant mitral regurgitation and impairment of functional capacity.Caseous calcification of the mitral annulus needs to be considered and confirmed by transthoracic echocardiography since there is potential for diagnostic confusion or misdiagnosis. This lesion appears to have a benign prognosis but, when associated with mitral valve dysfunction, cardiac surgery appears to be the best therapeutic option.Mitral annular calcification (MAC) is a chronic degenerative process, which occurs mainly in older patients, particularly in women and in patients with end-stage renal failure on chronic dialysis [1]. Caseous calcification of the mitral annulus (CCMA) is a relatively rare variant with an echocardiographic prevalence of 0.6% in patients with MAC and 0.06% to 0.07% in large series of patients of all ages [2,3].We describe a patient who was referred to our echocardiographic laboratory because of progressive impairment of functional capacity (up to New York Heart Association (NYHA) class III), and in whom moderate to severe mitral regurgitation (MR) and CCMA were found.A symptomatic 69-year-old woman (NYHA functional class III) underwent a transthoracic echocardiographic (TTE) examination to assess her left ventricular function. Her past history included hypercholesterolaemia, hypothyroidism and paroxystic atrial fibrillation. A DDD type pacemaker had been implanted due to sick sinus syndrome one year previously. She had marked limitation of physical activity. She was comfortable at rest but breathless on mild exertion. Physical examination revealed a pansystolic murmur of grade 3/6 audible in the mitral area. An electrocardiogram was completely normal. Laboratory examinations were as follows: haemoglobin 12.3 g/dl, glycaemia 72 mg/dl, urea 37 mg/dl, creatinine 0.9 mg/dl, calcium 8.7 mmol/l
Early Doppler-echocardiography evaluation of Carpentier-Edwards Standard and Carpentier-Edwards Magna aortic prosthetic valve: comparison of hemodynamic performance
Giovanni Minardi, Giovanni Pulignano, Donatella Del Sindaco, Martina Sordi, Herribert Pavaci, Amedeo Pergolini, Giordano Zampi, Francesca Moschella Orsini, Carlo Gaudio, Francesco Musumeci
Cardiovascular Ultrasound , 2011, DOI: 10.1186/1476-7120-9-37
Abstract: Three-hundred-seventy-seven consecutive patients, who had had a CEPS or a CEPM implanted in our Hospital due to aortic stenosis and/or insufficiency, underwent baseline Doppler echocardiography evaluation within 7 days after surgery. Hemodynamic performances of CEPS and CEPM were accurately described, evaluating flow-dependent (transprosthetic velocities and gradients) and flow-independent (effective orifice area, indexed effective orifice area and Doppler velocity index) Doppler-echocardiography parameters.Out of the 377 patients 48.8% were men (n = 184), mean age was 74.63 ± 6.77 years, mean BSA was 1.78 ± 0.18 m2, mean ejection fraction was 57.78 ± 8%. Two-hundred and sixty two CEPS and 115 CEPM were implanted. Comparing size-by-size CEPS with CEPM, both prostheses showed a good hemodynamic profile, with fairly similar values of pressure gradients (PGmax and mean, in mmHg, = 37,18 ± 11.57 and 20.81 ± 7.44 in CEPS n°19 compared to 32,47 ± 7,76 and 17,67 ± 4.63 in CEPM n°19 and progressively lower in higher sized prostheses, having PGmax and mean 15 ± 3,16 and 9.15 ± 1,29 in CEPS n°29 compared to 15,67 ± 1,53 and 9 ± 1 in CEPM n°29) and EOAi (being 0,65 ± 0,33 cm2/m2 in CEPS n°19 compared to 0,77 ± 0,29 cm2/m2 in CEPM n°19 and progressively higher in higher sized prostheses, being 1,28 ± 0,59 cm2/m2 in CEPS n°29 compared to 1,07 ± 0,18 cm2/m2 in CEPM n°29), the latter resulting, however, basically less flow obstructive.Our data confirm the good hemodynamic performance of both aortic bioprostheses and the more favourable hemodynamic profile of CEPM compared to CEPS, pointing out the need to perform routinely an accurate baseline Doppler-echocardiography evaluation early after surgery to allow an adequate interpretation of data at follow-up.Doppler-echocardiography is widely used to study the hemodynamic performance of prosthetic aortic valves. As for native valves, several Doppler echocardiography parameters (i.e. pressure gradients, effective orifice area, Doppler
Análise da coes?o entre se??es de textos de documentos extensos apartir da aplica??o conjunta das técnicas de análise de redes sociais e referências internas
De Sordi, José Osvaldo;
Perspectivas em Ciência da Informa??o , 2009, DOI: 10.1590/S1413-99362009000100011
Abstract: this article refers to the quality of the textual information, more specifically in extensive documents, addressing the cohesion between text sections. in this sense, an approach was proposed and tested which integrates two technical resources: social network analysis and internal references. the methodology employed was participatory research, including cohesion analysis between 109 sections of an extensive document text developed by the actual researchers. the results have proved satisfactory in helping the researchers to identify points for improvement of cohesion between the various text units in the extensive document analyzed.
A constitui??o da inteligência: uma abordagem psicanalítica
Sordi, Regina Orgler;
Psicologia: Reflex?o e Crítica , 2005, DOI: 10.1590/S0102-79722005000300007
Abstract: this paper aims to discuss human intelligence in the psychoanalytical perspective, particularly considering the contribution of silvia bleichmar who explores how human mind develops the intellectual activity from the embryonic states. it is recognized the contribution of genetic epistemology developed by jean piaget which allows to understand the capacity to build symbolic systems from sensory-motor schemes. there is also pointed some convergence between the genetic psychology and the psychoanalytic thought. what is stressed in this article, however, is that the contribution of psychoanalysis about the origins of intelligence has been less studied, although it is of most interest both theoretically and clinically. the theoretical inspiration of the paper relies on freud's theory but it is more definitely grounded on the french school of jean laplanche. it tries to show that to reach the objectivity of logical structures, characterized by the categories of the aristotelian logic - classification, space, time, causality, denial - the psychism does an active work of mind connection which starts in the first inscriptions of the other sexualized human and has to implant the originary repression, the only one able to organize the logic of the secondary thought. it stresses, at the end, that the contribution about a theory of the origins of psychism, concerning the development of intelligence is of great help in the studies about learning disabilities, as it differentiates learning difficulties due to secondary causes of the disorders which address to the lack of constitution of the ego.
The constitution of intelligence: a psychoanalytical approach / A constitui o da inteligência: uma abordagem psicanalítica
Regina Orgler Sordi
Psicologia: Reflex?o e Crítica , 2005,
Abstract: This paper aims to discuss human intelligence in the psychoanalytical perspective, particularly considering the contribution of Silvia Bleichmar who explores how human mind develops the intellectual activity from the embryonic states. It is recognized the contribution of genetic epistemology developed by Jean Piaget which allows to understand the capacity to build symbolic systems from sensory-motor schemes. There is also pointed some convergence between the genetic psychology and the psychoanalytic thought. What is stressed in this article, however, is that the contribution of psychoanalysis about the origins of intelligence has been less studied, although it is of most interest both theoretically and clinically. The theoretical inspiration of the paper relies on Freud's theory but it is more definitely grounded on the French school of Jean Laplanche. It tries to show that to reach the objectivity of logical structures, characterized by the categories of the Aristotelian logic – classification, space, time, causality, denial – the psychism does an active work of mind connection which starts in the first inscriptions of the other sexualized human and has to implant the originary repression, the only one able to organize the logic of the secondary thought. It stresses, at the end, that the contribution about a theory of the origins of psychism, concerning the development of intelligence is of great help in the studies about learning disabilities, as it differentiates learning difficulties due to secondary causes of the disorders which address to the lack of constitution of the ego.
Alternative UV Sensors Based on Color-Changeable Pigments  [PDF]
Martina Vikova, Michal Vik
Advances in Chemical Engineering and Science (ACES) , 2011, DOI: 10.4236/aces.2011.14032
Abstract: Photochromism is a chemical process in which a compound undergoes a reversible change between two states having separate absorption spectra, i.e. different color [1]. In our previous work we have published some solutions of problems of measuring photochromic textile sample by standard commercial spectrophotometric systems [2]. Main problem with measurement of kinetic behavior of photochromic pigments by standard spectrophotometer is relatively long time period between individual measurements (5 s) and impossibility of measuring whole color change during exposure without interruption of illumination of sample during measurement. It means, standard commercial spectrophotometers enable off-line measurement of kinetic behavior during exposure period and quasi on-line measurement during reversion period. Based on this problem, it is only possible to obtain precise data during reversion—decay process and growth process (exposure) is affected by high variability of data. Following this knowledge, we developed original experimenttal system with short time scanning of color change of photochromic samples during growth and decay period of color change. In this study it is presented new view on the relationship between intensity of UV-A radiation and color change half-life t1/2. Via this relation, it is demonstrated the possibility of the flexible textile-based sensors construction in the area of the radiation intensity identification.
Implica??es ético-epistemológicas da negocia??o nos processos de avalia??o institucional participativa
Sordi, Mara Regina Lemes De;
Educa??o & Sociedade , 2012, DOI: 10.1590/S0101-73302012000200009
Abstract: this paper discusses the importance of alternative models of regulation of the quality of public schools in response to the purposeful evaluation models focused on student achievement on standardized tests. given the paucity of studies on public policy implementation becomes the experience of a municipal school system as a reference for the analysis of the strengths and vulnerabilities of the evaluation process implemented taking as participatory institutional focus on the negotiation meetings between the managers of the central and the actors of the schools. the aim is to identify concepts of quality and assessment governing the negotiation process and the consequences for decision making. it is observed that the actors tend to enhance the understanding of his role in negotiating and there is evidence of expanding the role and involvement of players from schools with the logic evaluation of the model with the continuity of the process.
Comiss?o própria de avalia??o (cpa): similaridades e dessemelhan?as no uso da estratégia na educa??o superior e em escolas do ensino fundamental
De Sordi, Mara Regina Lemes;
Avalia??o: Revista da Avalia??o da Educa??o Superior (Campinas) , 2011, DOI: 10.1590/S1414-40772011000300006
Abstract: the study aims to think about the meaning of the self evaluation commissions created as a strategy that permits institutional self- evaluation processes in higher education. it aims to establish comparisons from a rereading of the model used by sinaes in brazil higher education. the results confirm the importance of the self evaluation commissions as an instance that promotes the meeting of the social actors in collective spaces to search for the improvement of learning quality in an organized and plural form. the advantages of the use of such commissions in fundamental school education are appointed by the proximity of the self evaluation processes of the internal and external actors related to the school.
Page 1 /1732
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.