Acute resveratrol supplementation in coronary artery disease: towards patient stratification

Objective: Resveratrol (RV) is a polyphenol with antioxidant, anti-inflammatory and cardio-protective properties. Our objective was to investigate whether acute supplementation with high doses of RV would improve flow-mediated dilation (FMD) and oxygen consumption (VO2) kinetics in older coronary artery disease (CAD) patients. Design: We employed a placebo-controlled, single-blind, crossover design in which ten participants (aged 66.6 ± 7.8 years) received either RV or placebo (330 mg, 3× day−1) during three consecutive days plus additional 330 mg in the morning of the fourth day with a seven-day wash-out period in-between. On the fourth day, FMD of the brachial artery and VO2 on-kinetics were determined. Results: RV improved FMD in patients who had undergone coronary artery bypass grafting (CABG; –1.4 vs. 5.0%; p = .004), but not in those who had undergone percutaneous coronary intervention (PCI; 4.2 vs. –0.2%; NS). Conclusion: Acute high dose supplementation with RV improved FMD in patients after CABG surgery but impaired FMD in patients who underwent PCI. The revascularization method-related differential effects of RV may be due to its direct effects on endothelial-dependent dilator responses. Our findings have important implications for personalized treatment and stratification of older CAD patients

Aerobic interval training and continuous training equally improve aerobic exercise capacity in patients with coronary artery disease:The SAINTEX-CAD study

AbstractBackgroundExercise-based cardiac rehabilitation increases peak oxygen uptake (peak VO2), which is an important predictor of mortality in cardiac patients. However, it remains unclear which exercise characteristics are most effective for improving peak VO2 in coronary artery disease (CAD) patients. Proof of concept papers comparing Aerobic Interval Training (AIT) and Moderate Continuous Training (MCT) were conducted in small sample sizes and findings were inconsistent and heterogeneous. Therefore, we aimed to compare the effects of AIT and Aerobic Continuous Training (ACT) on peak VO2, peripheral endothelial function, cardiovascular risk factors, quality of life and safety, in a large multicentre study.MethodsTwo-hundred CAD patients (LVEF >40%, 90% men, mean age 58.4±9.1years) were randomized to a supervised 12-week cardiac rehabilitation programme of three weekly sessions of either AIT (90–95% of peak heart rate (HR)) or ACT (70–75% of peak HR) on a bicycle. Primary outcome was peak VO2; secondary outcomes were peripheral endothelial function, cardiovascular risk factors, quality of life and safety.ResultsPeak VO2 (ml/kg/min) increased significantly in both groups (AIT 22.7±17.6% versus ACT 20.3±15.3%; p-time<0.001). In addition, flow-mediated dilation (AIT+34.1% (range –69.8 to 646%) versus ACT+7.14% (range –66.7 to 503%); p-time<0.001) quality of life and some other cardiovascular risk factors including resting diastolic blood pressure and HDL-C improved significantly after training. Improvements were equal for both training interventions.ConclusionsContrary to earlier smaller trials, we observed similar improvements in exercise capacity and peripheral endothelial function following AIT and ACT in a large population of CAD patients

Is Cardiorespiratory Fitness Related to Cardiometabolic Health and All-Cause Mortality Risk in Patients with Coronary Heart Disease? A CARE CR Study

Background: Higher cardiorespiratory fitness (CRF) is associated with lower morbidity and mortality in patients with coronary heart disease (CHD). The mechanisms for this are not fully understood. A more favourable cardiometabolic risk factor profile may be responsible, however few studies have comprehensively evaluated cardiometabolic risk factors in relation to CRF, among patients with CHD. Objective: To explore differences in cardiometabolic risk and 5-year all-cause mortality risk in patients with CHD who have low, moderate, and high levels of CRF. Methods: Patients with CHD underwent maximal cardiopulmonary exercise testing (CPET), echocardiogram, carotid intima-media thickness measurement, spirometry, and dual X-ray absorptiometry assessment. Full blood count, biochemical lipid pro-files, high sensitivity (hs)- C-reactive protein and NT-proBNP were analysed. Pa-tients were defined as having low, moderate, or high CRF based on established prognostic thresholds. Results: 70 patients with CHD (age 63.1 ± 10.0 years, 86% male) were recruited. Patients with low CRF had a lower ventilatory anaerobic threshold, peak oxygen pulse, post-exercise heart rate recovery and poor ventilatory efficiency. The low CRF group also had higher NT pro-BNP, hs-CRP, non-fasting glucose concentrations and lower haemoglobin and haematocrit. Five-year mortality risk (CALIBER risk score) was also greatest in the lowest CRF group (14.9%). Conclusion: Practitioners should interpret low CRF as an important clinical risk factor associated with adverse cardiometabolic health and poor prognosis. Study registry; researchregistry.com (researchregistry3548). Key Words: Coronary Heart Disease, Cardiac Rehabilitation, Cardiometabolic Health, Exercise Training, Atherosclerosis, VO2peak, Maximal Cardiopulmonary Exercise Testing, Caliber 5-year ris

Protocol for process evaluation of evidence-based care pathways: the case of colorectal cancer surgery

BACKGROUND AND AIM: Care pathways are complex interventions, consisting of multiple 'active ingredients', to structure care processes around patient needs. Numerous studies have reported improved outcomes after implementation of care pathways. The structure-process-outcome framework and the context-mechanism-outcome framework both suggest that outcomes can only be achieved through a certain process within a context or structure. To understand how and why care pathways are effective, understanding of both this process and context is necessary. The aim of this article is to propose a study protocol to evaluate the implementation process of evidence-based care pathways, including the influence of the context. This protocol is explained by applying it to the implementation of a colorectal cancer surgery pathway in an international setting. METHODS: The Medical Research Council (MRC) guidance on process evaluations for complex interventions is used as the basis for the protocol. The key components of process evaluation are intervention, context, implementation, mechanisms of impact and outcomes. In process evaluations, these components are studied using quantitative and qualitative methods. Among them are patient record analysis, questionnaires, on-site visits and interviews. DISCUSSION: To guide our methodological choices, the MRC guidance for process evaluations of complex interventions, and published protocols for process evaluations of complex interventions were used. Our protocol is now tailored for the process evaluation of evidence-based care pathways and provides researchers and clinicians methods and tools, as well as a worked example, that can be used to study the process of care pathway implementation. As a result, healthcare professionals will be informed on context factors and implementation processes that can facilitate the implementation of care pathways, improving quality and effectiveness of care processes

Qualitative Evaluation of the Implementation of a Care Pathway for Colorectal Cancer Surgery

Colorectal cancer care can be standardized by using enhanced recovery protocols. However, adherence to these protocols varies. Using Medical Research Council (MRC) guidance on process evaluations, we examined the experience of health care professionals in the implementation of a care pathway for colorectal surgery, by describing the intervention, context, implementation, mechanisms, and outcomes. Based on data from semi-structured interviews, we divided respondents into two groups: those who perceived positive outcomes of the implementation and those who perceived no effect. Respondents who perceived positive outcomes reported clinical leadership, use of feedback, positive effects of standardization, and teamwork as factors contributing to positive perceived outcomes. Respondents who perceived no effect reported a lack of organizational support, as well as challenging collaboration and standardization as mechanisms potentially explaining the poorer perception of outcomes. Multiple implementation activities were used, focusing on competence, behavior, or workplace. Our findings suggest that feedback is an important implementation activity

Overview on the target population and methods used in care pathway projects: A narrative review

Background: There is evidence that the efficiency and effectiveness of care processes can be improved in all countries. Care pathways (CPs) are proposed as a method to improve the quality of care by reducing variation. During the last decades, CPs have been intensively used in practice. The objective of this study is to examine the study designs for investigating CPs, for which pathologies CPs are used and what the reported indicators to measure the impact of CPs are. Methods: A narrative review of the literature published from 2015 to 2019 was performed. Results: We identified 286 studies, of which 207 evaluated the impact of CPs, 33 were review articles, 29 studies described the development of a CP, 12 were study protocols and 5 opinion papers. The most frequently reported study design for studying the impact of a CP is pre-posttest (n = 82), followed by cross-sectional studies (n = 50). Oncology, cardiovascular disease and abdominal surgery are the domains with the highest numbers of studies evaluating the impact of CPs. Financial (n = 86), process (n = 76) and clinical indicators (n = 74) are the most frequently reported indicators while service (n = 12) and team indicators (n = 6) are less reported. Conclusions: Based on the relative low number of identified studies compared with the number of CP projects in organisations, we conclude that the CP knowledge is not only found in the literature. We, therefore, argue that (inter)national scientific societies should not only focus on searching and spreading evidence on the content of care but also enhance their knowledge sharing initiatives on the organisation of care processes

A mixed methods multiple case study to evaluate the implementation of a care pathway for colorectal cancer surgery using extended normalization process theory

Background: Specific factors that facilitate or prevent the implementation of enhanced recovery protocols for colorectal cancer surgery have been described in previous qualitative studies. This study aims to perform a concurrent qualitative and quantitative evaluation of factors associated with successful implementation of a care pathway (CP) for patients undergoing surgery for colorectal cancer. Methods: This comparative mixed methods multiple case study was based on a sample of 10 hospitals in 4 European countries that implemented a specific CP and performed pre- and post-implementation measurements. In-depth post-implementation interviews were conducted with healthcare professionals who were directly involved. Primary outcomes included protocol adherence and improvement rate. Secondary outcomes included length of stay (LOS) and self-rated protocol adherence. The hospitals were ranked based on these quantitative findings, and those with the highest and lowest scores were included in this study. Qualitative data were summarized on a per-case basis using extended Normalization Process Theory (eNPT) as theoretical framework. The data were then combined and analyzed using joint display methodology. Results: Data from 381 patients and 30 healthcare professionals were included. Mean protocol adherence rate increased from 56 to 62% and mean LOS decreased by 2.1 days. Both measures varied greatly between hospitals. The two highest-ranking hospitals and the three lowest-ranking hospitals were included as cases. Factors which could explain the differences in pre- and post-implementation performance included the degree to which the CP was integrated into daily practice, the level of experience and support for CP methodology provided to the improvement team, the intrinsic motivation of the team, shared goals and the degree of management support, alignment of CP development and hospital strategy, and participation of relevant disciplines, most notably, physicians. Conclusions: Overall improvement was achieved but was highly variable among the 5 hospitals evaluated. Specific factors involved in the implementation process that may be contributing to these differences were conceptualized using eNPT. Multidisciplinary teams intending to implement a CP should invest in shared goals and teamwork and focus on integration of the CP into daily processes. Support from hospital management directed specifically at quality improvement including audit may likewise facilitate the implementation process. Trial registration: NCT02965794. US National Library of Medicine, ClinicalTrials.gov. Registered 4 August 2014