Cardiothoracic Surgical Trials Network

Cardiothoracic Surgical Trials Network
Name	Cardiothoracic Surgical Trials Network
Formation	2007
Founder	National Heart, Lung, and Blood Institute; National Institutes of Health
Type	Research network
Headquarters	Bethesda, Maryland
Leader title	Steering Committee Chair

Cardiothoracic Surgical Trials Network is a multicenter cooperative clinical trials network established to evaluate interventions in thoracic and cardiac surgery through randomized trials and observational studies. It brings together academic medical centers, specialty societies, and federal research agencies to address perioperative outcomes and long-term survival after procedures such as coronary artery bypass grafting and valve repair. The network has influenced guideline development and comparative effectiveness research by integrating surgical expertise with trial methodology.

History and Formation

The network was launched following programmatic initiatives by the National Heart, Lung, and Blood Institute and the National Institutes of Health after calls for rigorous evaluation of operative strategies cited in reports from the Institute of Medicine, the American Heart Association, and the American College of Cardiology. Early planning involved investigators from Duke University School of Medicine, Stanford University School of Medicine, Cleveland Clinic, Johns Hopkins Hospital, and Massachusetts General Hospital alongside representatives from the Society of Thoracic Surgeons, the American Association for Thoracic Surgery, and the European Association for Cardio-Thoracic Surgery. The initial funding announcement and cooperative agreement process followed precedents set by networks such as the Pediatric Heart Network and the Cardiovascular Cell Therapy Research Network.

Organization and Governance

Governance is structured with a steering committee, executive committee, data coordinating center, and clinical sites drawn from tertiary centers like Mayo Clinic, University of Pennsylvania Health System, Columbia University Irving Medical Center, and University of Michigan. Protocol oversight involves institutional review boards at centers including University of California, San Francisco, Northwestern Memorial Hospital, and Vanderbilt University Medical Center. Methodologic leadership has included trialists with appointments at Harvard Medical School, Perelman School of Medicine at the University of Pennsylvania, and Yale School of Medicine, while biostatistics support is provided by data cores modeled after the Biostatistics Collaborative Unit at Johns Hopkins Bloomberg School of Public Health.

Research Programs and Major Trials

Major trials have compared revascularization strategies, valve repair versus replacement, and perioperative adjuncts. Notable multicenter randomized studies recruited from centers such as Mount Sinai Hospital (Manhattan), University of California, Los Angeles Medical Center, Brigham and Women's Hospital, and Washington University School of Medicine in St. Louis. Key topics paralleled landmark investigations by groups at Oxford University Hospitals and Imperial College London in valve research and mirrored comparative effectiveness work by teams at Toronto General Hospital and Peter Munk Cardiac Centre. Trials addressed outcomes analogous to those in historical studies from Cleveland Clinic Foundation and contemporary registries like the STS National Database.

Methodology and Trial Design

The network instituted adaptive designs, pragmatic randomization, and standardized core laboratory adjudication modeled on methods from the Clinical Trials Unit at University College London and the RAND Corporation. Endpoint committees included clinicians from Royal Brompton Hospital, statisticians from Fred Hutchinson Cancer Research Center, and imaging experts affiliated with Mayo Clinic Proceedings editorial leadership. Quality assurance incorporated site monitoring practices used by cooperative groups including the Children's Oncology Group and data management platforms analogous to those at the Vaccine and Treatments Evaluation Unit.

Impact on Clinical Practice and Guidelines

Findings have informed guideline panels convened by the American College of Cardiology, the American Heart Association, and the European Society of Cardiology, and influenced performance metrics referenced by the Centers for Medicare & Medicaid Services and credentialing standards from the American Board of Thoracic Surgery. Results have been cited in guideline updates alongside evidence from trials performed at St Bartholomew's Hospital, Karolinska University Hospital, and Hospital of the University of Pennsylvania, shaping recommendations for perioperative care that parallel practice changes advocated by the World Health Organization and specialty societies such as the Association of Cardiothoracic Surgery of Great Britain and Ireland.

Funding and Collaborations

Primary funding comes from the National Heart, Lung, and Blood Institute within the National Institutes of Health, supplemented by cooperative agreements with academic centers and in-kind support from professional organizations like the Society of Thoracic Surgeons and philanthropic entities similar to the Robert Wood Johnson Foundation. Collaborations extend internationally to groups at University College London Hospitals NHS Foundation Trust, Karolinska Institutet, and University of Toronto, and commercial partnerships for device trials have involved manufacturers that also work with the Food and Drug Administration regulatory pathways.

Criticisms and Challenges

Critiques have addressed limited generalizability when high-volume tertiary centers such as Cleveland Clinic and Mayo Clinic dominate enrollment, potential conflicts of interest when industry partners participate as seen in debates at the Institute of Medicine, and logistical hurdles cited by trialists from Duke University and Vanderbilt University Medical Center. Other challenges include balancing pragmatic designs advocated by Oxford University investigators with regulatory expectations of the Food and Drug Administration and ensuring equitable representation of community hospitals similar to discussions involving the National Cancer Institute cooperative groups.

Category:Clinical research networks Category:Cardiothoracic surgery