101,882 research outputs found
Impatto sui risultati a lungo termine dell’estensione della resezione distale dell’aorta negli interventi per dissezione aortica tipo A
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Danno ematico correlato al bypass cardiopolmonare. Confronto in vivo ed in vitro fra due differenti pompe centrifughe
No full textSignificato della Troponina I post-operatoria nei pazienti operati di rivascolarizzazione miocardica. Effetto sulla mortalità ospedaliera e sul follow-up a medio termine
No full textCardiac troponin I release after coronary artery bypass grafting operation: effects on operative and midterm survival
No full textBackground: Markers of myocardial necrosis are usually elevated in patients who have undergone a coronary bypass operation with cardiac arrest. The preferred marker in detecting acute myocardial ischemia is cardiac troponin I (cTnI). However, its ability to predict short-term and, particularly, midterm outcome after coronary bypass operations is uncertain. Methods: Two hundred thirty unselected patients undergoing surgical revascularization had cTnI measured preoperatively and 11 times postoperatively. Receiver operating characteristic curves were constructed using cTnI postoperative peak values in order to assess the prognostic sensitivity and specificity of the test. The cut-off value of 13 ng/mL was used to assess the prognostic significance of the peak cTnI postoperative release for short-term and midterm outcomes. Results: One hundred forty-six patients (63.5%) had postoperative cTnI peak values less than 13 ng/mL (mean peak value, 6.6 +/- 3.1 ng/mL) and 84 patients (36.5%) had postoperative cTnI peak values greater than 13 ng/mL (mean peak value, 45.5 +/- 59.9 ng/mL). Patients with peak cTnI greater than 13 ng/mL were older and had higher preoperative cTnI values. They required both longer cross-clamp time and CPB time. Moreover, hospital death in the cTnI greater than 13 ng/mL group (9.5% versus 0.7%, p = 0.0009) was significantly higher. Multivariate analysis showed that cTnI greater than 13 ng/mL was the only independent predictor of hospital death (odds ratio 10.33, p = 0.04) and hospital death from cardiac causes. A 2-year follow-up demonstrates that cTnI postoperative release had no influence on midterm mortality and hospitalization for due to cardiac illness. Conclusions: Cardiac troponin I is a valuable marker for immediate myocardial damage after coronary bypass operations. Its postoperative release does not predict midterm outcome
Minimally invasive tricuspid valve surgery without caval occlusion: Short and midterm results
No full textObjective: The use of minimally invasive or transcatheter interventions rather than standard full sternotomy operations to treat tricuspid valve (TV) disease is increasing. The debate however is still open regarding venous drainage management during cardiopulmonary bypass (CPB) and wheatear or not superior and inferior vena cava should be occluded during the opening of the right atrium to avoid air entrance in the venous line. The aim of the present study is to report operative outcomes and midterm follow-up results of minimally invasive TV surgery performed without caval occlusion. Methods: A retrospective outcome evaluation from institutional records was performed with prospective data entry. Considered were consecutive patients who underwent right mini-thoracotomy TV surgery isolated or combined with mitral valve surgery during the period from June 2013 to February 2020. A telephone and echocardiographic follow-up was performed. Results: During the study period, 68 consecutive patients underwent minimally invasive TV surgery without occlusion of cava veins. The mean age was 69 ± 14 years and 48 (70%) were female. All operations were performed safely without air-lock during CPB. A perioperative cerebral stroke occurred in one patient. The survival at a 5- and 8-year follow-up was 100% and 79%, respectively. No severe tricuspid regurgitation was evident at echocardiographic follow-up. Conclusion: Our results show that performing tricuspid surgery without caval occlusion is safe. The air was captured by the active vacuum drainage system without causing damage. Midterm follow-up data confirm that a minimally invasive approach does not alter the quality of surgery
) Danno ematico correlato al by-pass cardiopolmonare.Confronto in vitro ed in vivo fra due differenti pompe centrifughe
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Bibliographie Hilarion G. Petzold 1958 – 2009 mit Anhang als Einführung
No full textDieses Archiv enthält die Gesamtbibliographie der Werke des Autors nebst einiger Texte „Über H. G. Petzold“ im Schlussteil der Bibliographie sowie einen Anhang mit einer Einführung in die Architektur des Werkes in seinem wissenslogischen Aufbau als Ausarbeitung seines „Tree of Science Modells“ (2007).This archive contains the complete bibliography of the author and some texts about H. G. Petzold, moreover an epilogue with an introduction to the architecture of the works in its epistemological structure and composition and as an elaborations of Petzold’s „Tree of Science Modell (2007).https://www.fpi-publikation.de/polyloge/01-2009-petzold-h-g-gesamtbibliographie-h-g-petzold-1958-2009-updating-november2009/peerReviewedpublishedVersio
Dispelling the Myths Behind First-author Citation Counts
No full textWe 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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