1,720,972 research outputs found
Data set from Varrica A, Caldaroni F, Saitto G, Satriano A, Lo Rito M, Chiarello C, Ranucci M, Frigiola A, Giamberti A. Outcomes and Quality of Life After Ross Reintervention: Would You Make the Same Choice Again? Ann Thorac Surg. 2020 Jul;110(1):214-220. doi: 10.1016/j.athoracsur.2019.10.007. Epub 2019 Nov 23. PMID: 31770502.
No full textData set from Varrica A, Caldaroni F, Saitto G, Satriano A, Lo Rito M, Chiarello C, Ranucci M, Frigiola A, Giamberti A. Outcomes and Quality of Life After Ross Reintervention: Would You Make the Same Choice Again? Ann Thorac Surg. 2020 Jul;110(1):214-220. doi: 10.1016/j.athoracsur.2019.10.007. Epub 2019 Nov 23. PMID: 31770502
This is the abstract:
Background: The Ross procedure was introduced as a long-term if not definitive solution for aortic pathology. However, the rate of reoperation is not negligible.
Methods: This single-center prospective study assessed the general outcome of Ross reoperation and patients' perceived quality of life compared with 2 control groups (Ross non-reoperation and mechanical aortic valve replacement). Patient's preference regarding the choice between mechanical aortic valve and Ross procedure was investigated in a subgroup that could theoretically have been directed to either of the 2 procedures.
Results: Between 2005 and 2017, 64 consecutive patients underwent reoperation after Ross. Median age was 31 years. Median freedom from reoperation after the Ross procedure was 136 months. An autograft reoperation was required in 49, and 25 had homograft failure. No in-hospital death was recorded. Mean follow-up was 77 months (range, 6-164 months). Quality of life was assessed with the 36-Item Short Form Health Survey questionnaire. The Ross reoperation group showed a lower score involving psychological concerns compared with the other groups. In the reoperated-on patients group, 52 had adequate aortic annulus dimensions to receive a prosthetic valve instead of a Ross procedure. When asked whether they would make the same choice, only 31% confirmed the preference.
Conclusions: Reoperations after Ross procedure have low mortality and morbidity. Long-term follow-up showed a high quality of life, even after reoperations. However, owing to psychological concerns after the redo operation, when choosing a Ross procedure, it is our duty to thoroughly explain to patients that a high level of disillusion is predictable in case of reoperations
Pasqualin G, Riva A, Sturla F, Bevilacqua F, Chessa M, Lo Rito M, Camporeale A, Ferrero P, Giese D, Carminati M, Saracino A, Giamberti A, Redaelli A, Votta E, Lombardi M. Intracavitary blood flow dynamics in the systemic right ventricle after atrial switch operation: a shift from transverse to longitudinal systolic pattern.
No full textFailure of the systemic right ventricle (SRV) is based on morphological differences between right and left ventricles (RVs and LVs). RV adaptation to systemic afterload includes increased circumferential myocardial strain with an unknown impact on intracavitary hemodynamics. The study aimed to explore the SRV pattern of intracavitary blood flow, expressed as hemodynamic force (HDF), and its relationship with wall mechanics. 4D Flow MRI was acquired for twelve adults with transposition of great arteries after atrial switch operation (TGA/AS) SRVs and for twelve healthy subjects. HDF was projected onto the apical-basal, lateral-septal and inferior-anterior directions. The ratio of the root mean square between transverse (sum of HDFinferior-anterior and HDFlateral-septal) and longitudinal HDF (HDFapical-basal) was evaluated (RRMS). SRVs of patients with TGA/AS showed RRMS systolic values (0.94 ± 0.19) comparable to LVs (0.85 ± 0.33, p = 0.82), and significantly lower than RVs (1.85 ± 0.51, p < 0.0001). Concomitantly, averaged systolic HDFapical-basal magnitude (r=-0.77, p = 0.004) and RRMS systolic values (r = 0.84, p = 0.0007) showed a strong correlation with free-wall circumferential strain (FWCS). During diastole, TGA/AS SRVs had significantly lower HDFapical-basal than control LVs (p = 0.002), revealing a diastolic RRMS (0.72 ± 0.19) similar to RVs (0.96 ± 0.25, p = 0.17). In TGA/AS patients, SRVs structural and functional features impact on intracavitary hemodynamics, being different from that of healthy LVs and RVs. During systole, SRVs displayed a HDF shift towards LV, possibly as a result of increased FWCS. Inversely, the SRV diastolic filling appeared to be closely related to ventricular morphology, as suggested by RRMS comparable to RVs during diastole
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Data set from the article Lo Rito M, Grandinetti M, Muzio G, Varrica A, Frigiola A, Micheletti A, Chessa M, Giamberti A. Results for tricuspid valve surgery in adults with congenital heart disease other than Ebstein's anomaly†. Eur J Cardiothorac Surg. 2019 Oct 1;56(4):706-713. doi: 10.1093/ejcts/ezz093. PMID: 30919906.
No full text<p>Data set from the article Lo Rito M, Grandinetti M, Muzio G, Varrica A, Frigiola A, Micheletti A, Chessa M, Giamberti A. Results for tricuspid valve surgery in adults with congenital heart disease other than Ebstein's anomaly†. Eur J Cardiothorac Surg. 2019 Oct 1;56(4):706-713. doi: 10.1093/ejcts/ezz093. PMID: 30919906.</p>
<p>This is the abstract:</p>
<p><strong>Objectives: </strong>Tricuspid valve (TV) surgery in the adult with congenital heart disease (ACHD) is a frequently performed procedure. The aim of this study was to analyse postoperative and medium-term outcomes.</p>
<p><strong>Methods: </strong>We conducted a single-centre retrospective study of patients with ACHD who underwent TV surgery (January 2000-December 2016); patients with Ebstein's anomalies were excluded. Operative and clinical records were reviewed. Outcomes considered were survival, grade of insufficiency/stenosis and TV reoperation at follow-up.</p>
<p><strong>Results: </strong>A total of 128 patients with ACHD had TV surgery for functional regurgitation (n = 95), dysplasia (n = 23) and systemic TV (n = 10). Median age was 40.8 years [interquartile range (IQR) 25.3]; 55.5% were men. Preoperative regurgitation was classified as mild (n = 8), moderate (n = 47) and severe (n = 70). The TV was repaired in 109 as follows: ring annuloplasty (n = 43), de Vega annuloplasty (n = 29), Wooler annuloplasty (n = 13), commissural plasty (n = 9), Kay annuloplasty (n = 7) and others (n = 8). The TV was replaced in 19 patients with biological (n = 10) and mechanical (n = 9) prostheses. The median hospital stay was 12 days (IQR 10). The overall mortality rate was 8.6% (n = 11): 2 hospital deaths (1.6%) and 9 late deaths. Survival was 93% [95% confidence interval (CI) 85-97%] at 5 years and 83% (95% CI 70-91%) at 10 years. The median follow-up period was 4.95 years (IQR 7.7) with 1 TV reoperation. Echocardiographic assessment showed ≥moderate regurgitation in 34 (34.3%) patients. Suture plasty had a significantly higher incidence of TV regurgitation ≥moderate compared to ring annuloplasty (48.9% vs 26.3%; P = 0.033).</p>
<p><strong>Conclusions: </strong>TV surgery in the ACHD is frequently associated with other main procedures. Stabilizing the TV annulus with a prosthetic ring guarantees lower recurrence of moderate to severe regurgitation compared to suture plasty repair.</p>
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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