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Heart Valve Surgery (heart + valve_surgery)
Selected AbstractsCT15 RISK STRATIFICATION MODELS FOR HEART VALVE SURGERYANZ JOURNAL OF SURGERY, Issue 2007C. H. Yap Purpose Risk stratification models may be useful in aiding surgical decision-making, preoperative informed consent, quality assurance and healthcare management. While several overseas models exist, no model has been well-validated for use in Australia. We aimed to assess the performance of two valve surgery risk stratification models in an Australian patient cohort. Method The Society of Cardiothoracic Surgeons of Great Britain and Ireland (SCTS) and Northern New England (NNE) models were applied to all patients undergoing valvular heart surgery at St Vincent's Hospital Melbourne and The Geelong Hospital between June 2001 and November 2006. Observed and predicted early mortalities were compared using the chi-square test. Model discrimination was assessed by the area under the receiver operating characteristic (ROC) curve. Model calibration was tested by applying the chi-square test to risk tertiles. Results SCTS model (n = 1095) performed well. Observed mortality was 4.84%, expected mortality 6.64% (chi-square p = 0.20). Model discrimination (area under ROC curve 0.835) and calibration was good (chi-square p = 0.9). the NNE model (n = 1015) over-predicted mortality. Observed mortality 4.83% and expected 7.54% (chi-square p < 0.02). Model discrimination (area under ROC curve 0.835) and calibration was good (chi-square p = 0.9). Conclusion Both models showed good model discrimination and calibration. The NNE model over-predicted early mortality whilst the SCTS model performed well in our cohort of patients. The SCTS model may be useful for use in Australia for risk stratification. [source] Antagonist's View of Minimally Invasive Heart Valve SurgeryJOURNAL OF CARDIAC SURGERY, Issue 1 2000Denton A. Cooley M.D. No abstract is available for this article. [source] Advances in Heart Valve SurgeryJOURNAL OF INTERVENTIONAL CARDIOLOGY, Issue 6 2003MATTHIAS AAZAMI Heart valve surgery continues to evolve in a dynamic fashion. While the exact role of minimally invasive approaches still needs to be defined, progress has been made in the development of new bioprostheses and their durability. Most importantly, valve repair has been standardized for the mitral and introduced for the aortic valve with results that have been superior to valve replacement. Selection of the optimal procedure for the individual patient is now facilitated. In the future, a wider application of repair procedures and further improvements of biologic valves can be anticipated not only to influence long-term results but also the decision-making process for conservative or surgical treatment. (J Interven Cardiol 2003;16:535,541) [source] | ||||||||||