Addition of albumin to Traditional Risk Score Improved Prediction of Mortality in Individuals Undergoing Transcatheter Aortic Valve Replacement

• Autores: Yoni Grossman, Israel M. Barbash, Paul Fefer, Ilan Goldenberg, Anat Berkovitch, Ehud Regev, Noam Fink, Sagit Ben Zekry, Yafim Brodov, Alexander Kogan, Victor Guetta, Ehud Raanani, Amit Segev
• Localización: Journal of the American Geriatrics Society, ISSN 0002-8614, Vol. 65, Nº. 11, 2017, págs. 2413-2417
• Idioma: inglés
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• Resumen

  • Objectives The ability of the Society of Thoracic Surgeons (STS) and European System for Cardiac Operative Risk Evaluation (EuroSCORE)-2 scores to predict outcomes after transcatheter aortic valve replacement (TAVR) is insufficient. Frailty and serum albumin as a frailty marker were shown to correlate with prognosis after TAVR. We sought to evaluate the additive value of serum albumin to STS and EuroSCORE-2 scores to predict mortality in individuals undergoing TAVR.

    Design Retrospective analysis.

    Setting Tertiary-care hospital prospective registry.

    Participants Individuals who underwent TAVR (N = 426).

    Measurements We compared survival rates according to median baseline albumin levels (4 g/dL), STS score (4.5%), and EuroSCORE-2 (3.45%). Participants were divided into four groups according to median serum albumin and median STS and EuroSCORE-2 scores (high vs low), and 1-year survival rates were compared. A category-free net reclassification index (NRI) was calculated to compare the ability of a model of STS or EuroSCORE-2 alone to classify mortality risk with and without the addition of baseline serum albumin.

    Results Participants with low albumin levels had higher mortality (hazard ratio (HR) = 3.03, 95% confidence interval (CI) = 1.66–5.26, P < .001). Participants with low serum albumin and a high STS (HR = 4.55, 95% CI = 2.21–9.38, P < .001) or EuroSCORE-2 (HR = 2.72, 95% CI = 1.48–5.06, P = .001) score had higher mortality. Using NRI analysis, a model that included albumin in addition to STS correctly reclassified 42% of events (NRI = 0.58) and a model that included albumin in addition to EuroSCORE-2 correctly reclassified 44% of events (NRI = 0.64).

    Conclusion Serum albumin, as a marker of frailty, can significantly improve the ability of STS and EuroSCORE-2 scores to predict TAVR-related mortality.