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Ahmad D, Sá MP, Brown JA, Yousef S, Wang Y, Thoma F, Chu D, Kaczorowski DJ, West DM, Bonatti J, Yoon PD, Ferdinand FD, Serna-Gallegos D, Phillippi J, Sultan I. External validation of the ARCH score in patients undergoing aortic arch reconstruction under circulatory arrest. J Thorac Cardiovasc Surg 2024:S0022-5223(24)00383-0. [PMID: 38750690 DOI: 10.1016/j.jtcvs.2024.05.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Revised: 05/06/2024] [Accepted: 05/07/2024] [Indexed: 06/07/2024]
Abstract
BACKGROUND Aortic arch surgery with hypothermic circulatory arrest (HCA) carries a higher risk of morbidity and mortality compared to routine cardiac surgical procedures. The newly developed ARCH (arch reconstruction under circulatory arrest with hypothermia) score has not been externally validated. We sought to externally validate this score in our local population. METHODS All consecutive open aortic arch surgeries with HCA performed between 2014 and 2023 were included. Univariable and multivariable analyses were performed. Model discrimination was assessed by the C-statistic with 95% confidence intervals as part of the receiver operating characteristic (ROC) curve analysis. Model performance was visualized by a calibration plot and quantified by the Brier score. RESULTS A total of 760 patients (38.3% females) were included. The mean age was 61 (±13.6) years, with 56.4% of patients' age >60 years. The procedures were carried out mostly emergently or urgently (59.6%). Total arch replacement was performed in 32.5% of the patients, and aortic root procedures were carried out in 74.6%. In-hospital death occurred in 64 patients (8.4%), and stroke occurred in 5.4%. The C-statistic revealed a low discriminatory ability for predicting in-hospital mortality (area under the ROC curve, 0.62; 95% confidence interval, 0.54-0.69; P = .002); however, model calibration was found to be excellent (Brier score of 0.07). CONCLUSIONS The ARCH score for in-hospital mortality showed low discriminatory ability in our local population, although with excellent ability for prediction of mortality.
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Affiliation(s)
- Danial Ahmad
- Division of Cardiac Surgery, Department of Cardiothoracic Surgery, University of Pittsburgh, Pittsburgh, Pa; UPMC Heart and Vascular Institute, University of Pittsburgh Medical Center, Pittsburgh, Pa
| | - Michel Pompeu Sá
- Division of Cardiac Surgery, Department of Cardiothoracic Surgery, University of Pittsburgh, Pittsburgh, Pa; UPMC Heart and Vascular Institute, University of Pittsburgh Medical Center, Pittsburgh, Pa
| | - James A Brown
- Division of Cardiac Surgery, Department of Cardiothoracic Surgery, University of Pittsburgh, Pittsburgh, Pa; UPMC Heart and Vascular Institute, University of Pittsburgh Medical Center, Pittsburgh, Pa
| | - Sarah Yousef
- Division of Cardiac Surgery, Department of Cardiothoracic Surgery, University of Pittsburgh, Pittsburgh, Pa; UPMC Heart and Vascular Institute, University of Pittsburgh Medical Center, Pittsburgh, Pa
| | - Yisi Wang
- Division of Cardiac Surgery, Department of Cardiothoracic Surgery, University of Pittsburgh, Pittsburgh, Pa; UPMC Heart and Vascular Institute, University of Pittsburgh Medical Center, Pittsburgh, Pa
| | - Floyd Thoma
- Division of Cardiac Surgery, Department of Cardiothoracic Surgery, University of Pittsburgh, Pittsburgh, Pa; UPMC Heart and Vascular Institute, University of Pittsburgh Medical Center, Pittsburgh, Pa
| | - Danny Chu
- Division of Cardiac Surgery, Department of Cardiothoracic Surgery, University of Pittsburgh, Pittsburgh, Pa; UPMC Heart and Vascular Institute, University of Pittsburgh Medical Center, Pittsburgh, Pa
| | - David J Kaczorowski
- Division of Cardiac Surgery, Department of Cardiothoracic Surgery, University of Pittsburgh, Pittsburgh, Pa; UPMC Heart and Vascular Institute, University of Pittsburgh Medical Center, Pittsburgh, Pa
| | - David M West
- Division of Cardiac Surgery, Department of Cardiothoracic Surgery, University of Pittsburgh, Pittsburgh, Pa; UPMC Heart and Vascular Institute, University of Pittsburgh Medical Center, Pittsburgh, Pa
| | - Johannes Bonatti
- Division of Cardiac Surgery, Department of Cardiothoracic Surgery, University of Pittsburgh, Pittsburgh, Pa; UPMC Heart and Vascular Institute, University of Pittsburgh Medical Center, Pittsburgh, Pa
| | - Pyongsoo D Yoon
- Division of Cardiac Surgery, Department of Cardiothoracic Surgery, University of Pittsburgh, Pittsburgh, Pa; UPMC Heart and Vascular Institute, University of Pittsburgh Medical Center, Pittsburgh, Pa
| | - Francis D Ferdinand
- Division of Cardiac Surgery, Department of Cardiothoracic Surgery, University of Pittsburgh, Pittsburgh, Pa; UPMC Heart and Vascular Institute, University of Pittsburgh Medical Center, Pittsburgh, Pa
| | - Derek Serna-Gallegos
- Division of Cardiac Surgery, Department of Cardiothoracic Surgery, University of Pittsburgh, Pittsburgh, Pa; UPMC Heart and Vascular Institute, University of Pittsburgh Medical Center, Pittsburgh, Pa
| | - Julie Phillippi
- Division of Cardiac Surgery, Department of Cardiothoracic Surgery, University of Pittsburgh, Pittsburgh, Pa
| | - Ibrahim Sultan
- Division of Cardiac Surgery, Department of Cardiothoracic Surgery, University of Pittsburgh, Pittsburgh, Pa; UPMC Heart and Vascular Institute, University of Pittsburgh Medical Center, Pittsburgh, Pa.
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2
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Yamaguti T, Auler Junior JOC, Dallan LAO, Galas FRBG, Cunha LCC, Piccioni MDA. Markers of Tissue Perfusion as Predictors of Adverse Outcomes in Patients with Left Ventricular Dysfunction Undergoing Coronary Artery Bypass Surgery. Arq Bras Cardiol 2024; 121:e20230247. [PMID: 38597532 DOI: 10.36660/abc.20230247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Accepted: 11/14/2023] [Indexed: 04/11/2024] Open
Abstract
BACKGROUND Cardiac surgery patients may be exposed to tissue hypoperfusion and anaerobic metabolism. OBJECTIVE To verify whether the biomarkers of tissue hypoperfusion have predictive value for prolonged intensive care unit (ICU) stay in patients with left ventricular dysfunction who underwent coronary artery bypass surgery. METHODS After approval by the institution's Ethics Committee and the signing of informed consent, 87 patients with left ventricular dysfunction (ejection fraction < 50%) undergoing coronary artery bypass surgery were enrolled. Hemodynamic and metabolic biomarkers were collected at five time points: after anesthesia, at the end of the surgery, at ICU admission, and at six and twelve hours after. An analysis of variance for repeated measures followed by a Bonferroni post hoc test was used for repeated, continuous variables (hemodynamic and metabolic variables) to determine differences between the two groups over the course of the study period. The level of statistical significance adopted was 5%. RESULTS Thirty-eight patients (43.7%) who presented adverse outcomes were older, higher Euro score (p<0.001), and elevated ΔpCO2 as analyzed 12 hours after ICU admission (p<0.01), while increased arterial lactate concentration at 6 hours postoperatively was found to be a negative predictive factor (p<0.01). CONCLUSIONS Euro SCORE, six-hour postoperative arterial lactate, 12-hour postoperative ΔPCO2, and eRQ are independent predictors of adverse outcomes in patients with left ventricular dysfunction after cardiac surgery.
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Affiliation(s)
- Thiana Yamaguti
- Instituto do Coração do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP - Brasil
| | - José Otavio Costa Auler Junior
- Instituto do Coração do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP - Brasil
| | - Luís Alberto Oliveira Dallan
- Instituto do Coração do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP - Brasil
| | | | - Ligia Cristina Câmara Cunha
- Instituto do Coração do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP - Brasil
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Fang SY, Chen JW, Chou HW, Chan CY, Wu IH, Chou NK, Wang CH, Chi NH, Huang SC, Yu HY, Chen YS, Hsu RB. Validation of the European system for cardiac operative risk evaluation II in a large Taiwan cardiac surgical centre. J Formos Med Assoc 2023; 122:1265-1273. [PMID: 37316346 DOI: 10.1016/j.jfma.2023.05.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 05/22/2023] [Accepted: 05/24/2023] [Indexed: 06/16/2023] Open
Abstract
BACKGROUND The European System for Cardiac Operative Risk Evaluation (EuroSCORE II) is a well-established scoring system for predicting mortality in cardiac surgery. This system was derived predominantly from a European patient cohort; however, no validation of this system has been conducted in Taiwan. We sought to assess the performance of EuroSCORE II at a tertiary centre. METHODS The 2161 adult patients receiving cardiac surgery between 2017 and 2020 in our institution were included. RESULTS Overall, the in-hospital mortality rate was 7.89%. The performance of EuroSCORE II was assessed using the area under the receiver operator curve (AUC) for discrimination and the Hosmer-Lemeshow (H-L) test for calibration. Data were analysed for type of surgery, risk stratification, and status of the operation. EuroSCORE II had good discriminative power (AUC=0.854, 95% Confidence Interval (CI): 0.822-0.885) and good calibration (χ2=5.19, p=0.82) for all types of surgery except ventricular assist devices (AUC=0.618, 95% CI: 0.497-0.738). EuroSCORE II also showed good calibration for most types of surgery except coronary artery bypass surgery (CABG) combined procedure (P=0.033), heart transplantation (HT) (P=0.017), and urgent operation (P=0.041). EuroSCORE II significantly underestimated the risk for CABG combined procedure and urgent operations, and overestimated the risk for HT. CONCLUSION EuroSCORE II had satisfactory discrimination and calibration power to predict surgical mortality in Taiwan. However, the model is poorly calibrated for CABG combined procedure, HT, urgent operation, and, likely, lower- and higher-risk patients.
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Affiliation(s)
- Shih-Yu Fang
- Department of Surgery, Division of Cardiovascular Surgery, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Jeng-Wei Chen
- Department of Surgery, Division of Cardiovascular Surgery, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan; Graduate Institute of Clinical Medicine, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Heng-Wen Chou
- Department of Surgery, Division of Cardiovascular Surgery, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan; Graduate Institute of Clinical Medicine, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Chih-Yang Chan
- Department of Surgery, Division of Cardiovascular Surgery, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan
| | - I-Hui Wu
- Department of Surgery, Division of Cardiovascular Surgery, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Nai-Kuan Chou
- Department of Surgery, Division of Cardiovascular Surgery, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Chih-Hsien Wang
- Department of Surgery, Division of Cardiovascular Surgery, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Nai-Hsin Chi
- Department of Surgery, Division of Cardiovascular Surgery, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Shu-Chien Huang
- Department of Surgery, Division of Cardiovascular Surgery, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Hsi-Yu Yu
- Department of Surgery, Division of Cardiovascular Surgery, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Yih-Sharng Chen
- Department of Surgery, Division of Cardiovascular Surgery, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Ron-Bin Hsu
- Department of Surgery, Division of Cardiovascular Surgery, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan.
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Dong T, Sinha S, Zhai B, Fudulu DP, Chan J, Narayan P, Judge A, Caputo M, Dimagli A, Benedetto U, Angelini GD. Cardiac surgery risk prediction using ensemble machine learning to incorporate legacy risk scores: A benchmarking study. Digit Health 2023; 9:20552076231187605. [PMID: 37492033 PMCID: PMC10363892 DOI: 10.1177/20552076231187605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Accepted: 06/23/2023] [Indexed: 07/27/2023] Open
Abstract
Objective The introduction of new clinical risk scores (e.g. European System for Cardiac Operative Risk Evaluation (EuroSCORE) II) superseding original scores (e.g. EuroSCORE I) with different variable sets typically result in disparate datasets due to high levels of missingness for new score variables prior to time of adoption. Little is known about the use of ensemble learning to incorporate disparate data from legacy scores. We tested the hypothesised that Homogenenous and Heterogeneous Machine Learning (ML) ensembles will have better performance than ensembles of Dynamic Model Averaging (DMA) for combining knowledge from EuroSCORE I legacy data with EuroSCORE II data to predict cardiac surgery risk. Methods Using the National Adult Cardiac Surgery Audit dataset, we trained 12 different base learner models, based on two different variable sets from either EuroSCORE I (LogES) or EuroScore II (ES II), partitioned by the time of score adoption (1996-2016 or 2012-2016) and evaluated on holdout set (2017-2019). These base learner models were ensembled using nine different combinations of six ML algorithms to produce homogeneous or heterogeneous ensembles. Performance was assessed using a consensus metric. Results Xgboost homogenous ensemble (HE) was the highest performing model (clinical effectiveness metric (CEM) 0.725) with area under the curve (AUC) (0.8327; 95% confidence interval (CI) 0.8323-0.8329) followed by Random Forest HE (CEM 0.723; AUC 0.8325; 95%CI 0.8320-0.8326). Across different heterogenous ensembles, significantly better performance was obtained by combining siloed datasets across time (CEM 0.720) than building ensembles of either 1996-2011 (t-test adjusted, p = 1.67×10-6) or 2012-2019 (t-test adjusted, p = 1.35×10-193) datasets alone. Conclusions Both homogenous and heterogenous ML ensembles performed significantly better than DMA ensemble of Bayesian Update models. Time-dependent ensemble combination of variables, having differing qualities according to time of score adoption, enabled previously siloed data to be combined, leading to increased power, clinical interpretability of variables and usage of data.
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Affiliation(s)
- Tim Dong
- Translational Health Sciences, Bristol Heart Institute, University of Bristol, Bristol, UK
| | - Shubhra Sinha
- Translational Health Sciences, Bristol Heart Institute, University of Bristol, Bristol, UK
| | - Ben Zhai
- School of Computing Science, Northumbria University, Newcastle upon Tyne, UK
| | - Daniel P Fudulu
- Translational Health Sciences, Bristol Heart Institute, University of Bristol, Bristol, UK
| | - Jeremy Chan
- Translational Health Sciences, Bristol Heart Institute, University of Bristol, Bristol, UK
| | - Pradeep Narayan
- Department of Cardiac Surgery, Rabindranath Tagore International Institute of Cardiac Sciences, Kolkata, India
| | - Andy Judge
- Translational Health Sciences, Bristol Heart Institute, University of Bristol, Bristol, UK
| | - Massimo Caputo
- Translational Health Sciences, Bristol Heart Institute, University of Bristol, Bristol, UK
| | - Arnaldo Dimagli
- Translational Health Sciences, Bristol Heart Institute, University of Bristol, Bristol, UK
| | - Umberto Benedetto
- Translational Health Sciences, Bristol Heart Institute, University of Bristol, Bristol, UK
| | - Gianni D Angelini
- Translational Health Sciences, Bristol Heart Institute, University of Bristol, Bristol, UK
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Haidari Z, Demircioglu E, Boss K, Tyczynski B, Thielmann M, Schmack B, Kribben A, Weymann A, El Gabry M, Ruhparwar A, Wendt D. Intraoperative hemoadsorption in high-risk patients with infective endocarditis. PLoS One 2022; 17:e0266820. [PMID: 35900987 PMCID: PMC9333242 DOI: 10.1371/journal.pone.0266820] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Accepted: 03/29/2022] [Indexed: 11/18/2022] Open
Abstract
Background
Postoperative sepsis is an important cause of morbidity and mortality in patients with infective endocarditis undergoing surgical therapy. Blood purification using hemoadsorption therapy shows promising results in the treatment of sepsis. In this study, the clinical effects of intraoperative hemoadsorption in high-risk patients with infective endocarditis were evaluated.
Methods
Eligible candidates were high-risk patients with infective endocarditis undergoing cardiac surgery between January 2014 and December 2019. Patients with intraoperative hemoadsorption (hemoadsorption) were compared to patients without hemoadsorption (control). The endpoints were the incidence of postoperative sepsis, sepsis-associated death and in-hospital mortality. Additionally, postoperative vasopressor need, systemic vascular resistance indices and Sequential Organ Failure Assessment (SOFA) scores were compared.
Results
After propensity score matching, 70 high-risk patients were included. Postoperative sepsis occurred in 14 patients in the hemoadsorption group and in 16 patients in the control group, p = 0.629. Four patients died due to postoperative sepsis in the hemoadsorption group, while 11 postoperative septic patients died in the control group, p = 0.041. In-hospital mortality was 34% in the hemoadsorption group versus 43% in the control group, p = 0.461. On ICU-admission and the first postoperative day, the cumulative vasopressor need was 0.17 versus 0.25 μg/kgBW/min, p = 0.123 and 0.06 versus 0.11 μg/kgBW/min, p = 0.037, and the systemic vascular resistance index was 1448 versus 941 dyn·s·cm-5, p = 0.013 and 1156 versus 858 dyn·s·cm-5, p = 0.110 in the hemoadsorption versus control group, respectively. Postoperative course of SOFA score normalized significantly (p = 0.01) faster in the hemoadsorption group.
Conclusions
In high-risk cardiac surgical patients with infective endocarditis, intraoperative hemoadsorption significantly reduced sepsis-associated mortality. Furthermore, intraoperative hemoadsorption resulted in significant faster recovery of hemodynamics and organ function. Intraoperative hemoadsorption seems to attenuate the severity of postoperative sepsis.
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Affiliation(s)
- Zaki Haidari
- Department of Thoracic and Cardiovascular Surgery, West German Heart and Vascular Center Essen, Essen, Germany
- * E-mail:
| | - Ender Demircioglu
- Department of Thoracic and Cardiovascular Surgery, West German Heart and Vascular Center Essen, Essen, Germany
| | - Kristina Boss
- Department of Nephrology, University Hospital Essen, Essen, Germany
| | | | - Matthias Thielmann
- Department of Thoracic and Cardiovascular Surgery, West German Heart and Vascular Center Essen, Essen, Germany
| | - Bastian Schmack
- Department of Thoracic and Cardiovascular Surgery, West German Heart and Vascular Center Essen, Essen, Germany
| | - Andreas Kribben
- Department of Nephrology, University Hospital Essen, Essen, Germany
| | - Alexander Weymann
- Department of Thoracic and Cardiovascular Surgery, West German Heart and Vascular Center Essen, Essen, Germany
| | - Mohamed El Gabry
- Department of Thoracic and Cardiovascular Surgery, West German Heart and Vascular Center Essen, Essen, Germany
| | - Arjang Ruhparwar
- Department of Thoracic and Cardiovascular Surgery, West German Heart and Vascular Center Essen, Essen, Germany
| | - Daniel Wendt
- Department of Thoracic and Cardiovascular Surgery, West German Heart and Vascular Center Essen, Essen, Germany
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Subramani S. The current status of EuroSCORE II in predicting operative mortality following cardiac surgery. Ann Card Anaesth 2020; 23:256-257. [PMID: 32687077 PMCID: PMC7559946 DOI: 10.4103/aca.aca_32_19] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
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