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排序方式: 共有236条查询结果,搜索用时 78 毫秒
111.
ANDREA GUZZETTA ALESSANDRA PIZZARDI VITTORIO BELMONTI ANTONIO BOLDRINI MARCO CAROTENUTO GIULIA D’ACUNTO FABRIZIO FERRARI SIMONA FIORI CLAUDIO GALLO PAOLO GHIRRI EUGENIO MERCURI DOMENICO ROMEO MARIA FEDERICA ROVERSI GIOVANNI CIONI 《Developmental medicine and child neurology》2010,52(8):767-772
Aim The aim of this study was to explore the predictive value of quantitative assessment of hand movements in 3‐month‐old infants after neonatal stroke. Method Thirteen infants born at term (five females, eight males; mean gestational age 39.4wks, SD 1.19, range 37–41wks; mean birthweight 3240g, SD 203, range 2900–3570g) with neonatal arterial ischaemic cerebral infarction, and 13 healthy infants (mean gestational age 39.1wks, range 37–41wks, SD 1.26; mean birthweight 3190g, SD 259, range 2680–3490g) were enrolled in the study. The absolute frequency and the asymmetry of global hand opening and closing, wrist segmental movements, and independent digit movements were assessed from videotapes recorded at around 12 weeks. Neurological outcome was assessed when the infants were at least 18 months old using Touwen’s neurological examination. Results Five of the 13 infants with neonatal stroke had normal neurological development, and eight had hemiplegia. Asymmetry of wrist segmental movements and the absolute frequency of independent digit movements were significantly different between infants with and without hemiplegia (p=0.006 and p=0.008, respectively). No differences were found in global hand movements. Interpretation We propose that the observed abnormalities of hand movements are the result of two different mechanisms: direct disruption of the corticospinal projection to the spinal cord, and altered modulation of the central pattern generators of general movements. 相似文献
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MONICA DETTIN STEFANO PEGORARO PAOLO ROVERO SILVIO BICCIATO ANDREA BAGNO CARLO DI BELLO 《Chemical biology & drug design》1997,49(1):103-111
The H-Ala-Arg-(Ala)6-Lys-OH sequence is a biologically interesting ‘difficult sequence’ presenting Nα-Fmoc deprotection and coupling problems. Different chemical conditions and synthetic strategies have been tested in order to overcome the problems due to sequence-dependent interactions. In particular, it was confirmed that different solvents in the deprotection step did not provide any significant improvement, but the use of a more efficient base in the deprotection mixture avoided insufficient unblocking of Nα-protecting group; problems due to partial coupling in the last steps of the synthesis were solved by double coupling techniques. Moreover, the synthesis of the model peptide was carried out using both ‘continuous flow’ and ‘batch’ techniques. The present results demontrate that on-line monitoring of the deprotection step by absorbance measurements represents a very effective tool to detect the onset of internal aggregations during the synthesis. © Munksgaard 1997. 相似文献
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CLAUDIO TONDO M.D. PAOLO DELLA BELLA M.D. CORRADO CARBUCICCHIO M.D. STEFANTA RIVA M.D. 《Journal of cardiovascular electrophysiology》1996,7(8):689-696
Residual Slow Pathway Conduction Effects on AVN Function. Introduction : Residual slow pathway conduction with or without reentrant echo beats has been reported in 25% to 30% of patients undergoing ablation for AV nodal reentrant tachycardia (AVNRT).
Methods and Results : Fifty-eight consecutive patients (aged 45 ± 12 years) with slow-fast AVNRT underwent radiofrequency catheter ablation of the slow AV nodal pathway (SP). Residual slow-fast echo beat was documented in 21 (36%) of 58 patients (group A). The pre-and postablation AH intervals triggering the echo beats were similar (346 ± 8 msec vs 352 ± 6 msec, P = NS), as were the pre-and postablation echo zones (55 ± 6 msec vs 52 ± 5 msec, P = NS) and functional refractory period of the SP. A consistent prolongation of the AV nodal effective refractory period (AVN-ERP; from 265 ± 28 msec to 340 ± 50 msec, P < 0.001) and the Wenckebach cycle length (WBCL; from 298 ± 41 msec to 438 ± 43 msec, P < 0.001) was observed in all patients with abolition of SP conduction (group B). In group A patients, the prolongation of WBCL was less (285 ± 33 msec preablation, and 334 ± 41 msec postablation, P < 0.001). Additional pulses abolished the residual echo in 16 of 21 patients, and further prolongation of the AVN-ERP and WBCL comparable to those found in patients without a residual echo beat was observed. During 19 ± 8 months follow-up, no patient had clinical recurrence of AVNRT.
Conclusion : Residual single echo beat after SP ablation for AVNRT reflects the persistence of some portion of the SP with unchanged functional conduction properties whose prognostic significance is uncertain. A consistent increase of WBCL can be a reliable marker of complete abolition of slow pathway conduction and termination of AVNRT. 相似文献
Methods and Results : Fifty-eight consecutive patients (aged 45 ± 12 years) with slow-fast AVNRT underwent radiofrequency catheter ablation of the slow AV nodal pathway (SP). Residual slow-fast echo beat was documented in 21 (36%) of 58 patients (group A). The pre-and postablation AH intervals triggering the echo beats were similar (346 ± 8 msec vs 352 ± 6 msec, P = NS), as were the pre-and postablation echo zones (55 ± 6 msec vs 52 ± 5 msec, P = NS) and functional refractory period of the SP. A consistent prolongation of the AV nodal effective refractory period (AVN-ERP; from 265 ± 28 msec to 340 ± 50 msec, P < 0.001) and the Wenckebach cycle length (WBCL; from 298 ± 41 msec to 438 ± 43 msec, P < 0.001) was observed in all patients with abolition of SP conduction (group B). In group A patients, the prolongation of WBCL was less (285 ± 33 msec preablation, and 334 ± 41 msec postablation, P < 0.001). Additional pulses abolished the residual echo in 16 of 21 patients, and further prolongation of the AVN-ERP and WBCL comparable to those found in patients without a residual echo beat was observed. During 19 ± 8 months follow-up, no patient had clinical recurrence of AVNRT.
Conclusion : Residual single echo beat after SP ablation for AVNRT reflects the persistence of some portion of the SP with unchanged functional conduction properties whose prognostic significance is uncertain. A consistent increase of WBCL can be a reliable marker of complete abolition of slow pathway conduction and termination of AVNRT. 相似文献
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A Meta‐Analysis of Sex‐Related Differences in Outcomes After Primary Percutaneous Intervention for ST‐Segment Elevation Myocardial Infarction
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FEDERICO CONROTTO M.D. FABRIZIO D'ASCENZO M.D. KARIN H HUMPHRIES D.Sc. JOHN G WEBB M.D. PAOLO SCACCIATELLA M.D. COSTANZA GRASSO M.D. MAURIZIO D'AMICO M.D. GIUSEPPE BIONDI‐ZOCCAI M.D. FIORENZO GAITA M.D. SEBASTIANO MARRA M.D. 《Journal of interventional cardiology》2015,28(2):132-140
Introduction
The increasing use of primary percutaneous coronary intervention (pPCI) has improved clinical outcome in ST‐segment elevation myocardial infarction (STEMI) patients, but the impact of sex on early and mid‐term outcomes remains to be defined.Methods
Medline, Cochrane Library, Biomed Central, and Google Scholar were searched for articles describing differences in baseline, periprocedural, and midterm outcomes after pPCI, by sex. The primary end point was all‐cause mortality at early and mid‐term follow‐up. Secondary endpoints included in‐hospital bleeding and stroke.Results
Sixteen studies were included. Women were older, had more frequent hypertension, diabetes mellitus, and hypercholesterolemia, as well as longer ischemia time and more shock at presentation. Men were more likely to have had a previous myocardial infarction. Female sex emerged as independently associated to early mortality (OR 1.1; 95%CI, 1.02–1.18) but not to mid‐term mortality (OR, 1.01; 95%CI, 0.99–1.03). The pooled analysis showed a significantly higher risk of in hospital stroke (OR, 1.69; 95%CI, 1.11–2.56) and major bleeding (OR, 2.04; 95%CI, 1.51–2.77) in women.Conclusions
As compared to men, women undergoing pPCI have more bleedings and strokes, and a worse early, but not mid‐term mortality. These findings may allow a better risk stratification of pPCI patients.120.
ALBERTO BIANCHI LAURA MONTACCHINI PAOLA BARRAL PAOLO BORRIONE CARMELA ATTLSANO ENRICA ORSINI MARIO BOCCADORO ALESSANDRO PILERI MASSIMO MASSAIA 《British journal of haematology》1995,90(3):625-632
Summary. A large expansion of activated T cells (CD3+ CD25+ ) with the potential to act as anti-tumour effector cells is inducible in multiple myeloma (MM) patients by culturing bone marrow mononuclear cells (BMMCs) with the anti-CD3 monoclonal antibody (mAb) OKT3. The aim of this study was to provide a greater characterization of CD3-activated T cells. On day 6, most T cells coexpressed the CD1 la, CD18, CD54, CD45R0 antigens and consisted of activated (CD25+ ) CD4+ and CD8+ cells in nearly equal proportions. Kinetics studies showed that CD4+ CD25+ cells proliferated more rapidly and peaked earlier than CD8+ CD25+ cells. When experiments were performed with purified subpopulations by removing CD4+ cells (resulting in CD8+ BMMCs) or by removing CD8+ cells (resulting in CD4+ BMMCs), T-cell activation and autologous plasma cell decrease were observed in CD4+ BMMCs only. Transwell cultures showed that CD4 help was necessary to make CD8+ BMMCs susceptible to CD3 stimulation. Relevant amounts of IL-2 were found in the supernatants of CD4+ BMMCs cultures, whereas no secretion of IL-4 was detected, indicating a Thl-like profile of CD3-activated CD4+ cells.
These data indicate that CD4+ cells proliferate earlier and provide optimal help to induce the subsequent expansion of CD8+ cells after CD3 stimulation of MM BMMCs. Adequate stimulation of CD4+ cells is therefore essential in any strategy aiming to recover T-cell-mediated immunity in MM. 相似文献
These data indicate that CD4