Inhaled Epoprostenol Compared With Nitric Oxide for Right Ventricular Support After Major Cardiac Surgery.
Date
2023-07
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Abstract
Background
Right ventricular failure (RVF) is a leading driver of morbidity and mortality after major cardiac surgery for advanced heart failure, including orthotopic heart transplantation and left ventricular assist device implantation. Inhaled pulmonary-selective vasodilators, such as inhaled epoprostenol (iEPO) and nitric oxide (iNO), are essential therapeutics for the prevention and medical management of postoperative RVF. However, there is limited evidence from clinical trials to guide agent selection despite the significant cost considerations of iNO therapy.Methods
In this double-blind trial, participants were stratified by assigned surgery and key preoperative prognostic features, then randomized to continuously receive either iEPO or iNO beginning at the time of separation from cardiopulmonary bypass with the continuation of treatment into the intensive care unit stay. The primary outcome was the composite RVF rate after both operations, defined after transplantation by the initiation of mechanical circulatory support for isolated RVF, and defined after left ventricular assist device implantation by moderate or severe right heart failure according to criteria from the Interagency Registry for Mechanically Assisted Circulatory Support. An equivalence margin of 15 percentage points was prespecified for between-group RVF risk difference. Secondary postoperative outcomes were assessed for treatment differences and included: mechanical ventilation duration; hospital and intensive care unit length of stay during the index hospitalization; acute kidney injury development including renal replacement therapy initiation; and mortality at 30 days, 90 days, and 1 year after surgery.Results
Of 231 randomized participants who met eligibility at the time of surgery, 120 received iEPO, and 111 received iNO. Primary outcome occurred in 30 participants (25.0%) in the iEPO group and 25 participants (22.5%) in the iNO group, for a risk difference of 2.5 percentage points (two one-sided test 90% CI, -6.6% to 11.6%) in support of equivalence. There were no significant between-group differences for any of the measured postoperative secondary outcomes.Conclusions
Among patients undergoing major cardiac surgery for advanced heart failure, inhaled pulmonary-selective vasodilator treatment using iEPO was associated with similar risks for RVF development and development of other postoperative secondary outcomes compared with treatment using iNO.Registration
URL: https://www.Clinicaltrials
gov; Unique identifier: NCT03081052.Type
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Ghadimi, Kamrouz, Jhaymie L Cappiello, Mary Cooter Wright, Jerrold H Levy, Benjamin S Bryner, Adam D DeVore, Jacob N Schroder, Chetan B Patel, et al. (2023). Inhaled Epoprostenol Compared With Nitric Oxide for Right Ventricular Support After Major Cardiac Surgery. Circulation. 10.1161/circulationaha.122.062464 Retrieved from https://hdl.handle.net/10161/28419.
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Scholars@Duke
Kamrouz Ghadimi
Dr. Kamrouz (Kam) Ghadimi is an experienced cardiovascular acute care specialist (cardiovascular anesthesiology and intensive care), established investigator, physician leader, and adjunct associate professor of Anesthesiology at Duke Health.
His clinical practice is rooted in the cardiothoracic surgical ICU and operating rooms. He has broad expertise in all topics involving perioperative cardiovascular medicine and intensive care, including the management of acutely ill patients after surgery or those receiving extracorporeal life support (ECLS/ECMO). His specific area of expertise focuses on the enhancement of blood circulation through the lungs and the reversal of bleeding with prevention of thrombosis after surgery and circulatory life support. He has published original research, invited reviews, and guidance documents in several high-impact multidisciplinary journals and networks, including JAMA, Circulation, BMJ, Journal of the American College of Cardiology, Journal of Heart and Lung Transplantation, and Journal of Thrombosis & Haemostasis. He has also published in anesthesiology specialty journals, including Anesthesia & Analgesia, Anesthesiology, Current Opinion in Anesthesiology, and the British Journal of Anaesthesia. Dr. Ghadimi has served on the Editorial Board for the Journal of Cardiothoracic and Vascular Anesthesia since 2018 and has served as a peer reviewer for more than 30 top-medical journals worldwide.
Over his career, he has developed a global multidisciplinary network of collaborators and colleagues in academic medicine, private practice, larger healthcare systems, and offices of the federal government. He has experience with grant funding from a variety of sponsors, including federal, industry, foundation, philanthropy, and institutional sources. He also holds positions on several other national and international committees aimed at improving cardiovascular health in patients undergoing surgery and post-surgical intensive care. He is a selected task force and writing committee member of the 2024 American College of Cardiology and American Heart Association Perioperative Cardiovascular Guidelines. He has devoted the majority of his career to the service of patients requiring cardiovascular perioperative and surgical intensive care.
In addition to a doctorate in Medicine, Dr. Ghadimi holds a Bachelor’s in Economics from Boston University and a Master’s in Clinical Research from Duke University School of Medicine and the National Institutes of Health. He is also an inventor with patents/patents pending, a medical consultant, a mentor, and an investor. He is a founding member and the original academic director of True Learn, an eLearning company focused on board exam preparation for multiple medical subspecialties. This resource is used by many physicians around the country. Beyond developing an educational platform that has reached several thousand physicians and physicians-in-training, Dr. Ghadimi has formally mentored 22 pre-doctorate and post-doctorate trainees, with several mentees continuing their faculty careers in academic practice. In addition, he serves as a resource for a multitude of other physicians, physicians-in-training, and allied healthcare professionals.
Dr. Ghadimi previously served as Director of the Clinical Research Unit for the Department of Anesthesiology at Duke Health (2021-2026), leading a cohesive, high-performing management team and working with Anesthesiology faculty and faculty in other departments to operationalize multiple innovative research protocols annually (single- and multi-site studies) to advance the fields of perioperative medicine, intensive care, pain management, and brain and heart health.
Dr. Ghadimi currently serves as Chair for the Division of Surgical Critical Care at Cleveland Clinic in Cleveland, Ohio.
Adam David DeVore
Adam D. DeVore, MD, MHS
Dr. DeVore is a cardiologist and Associate Professor of Medicine in the Department of Medicine, Division of Cardiology, at Duke University School of Medicine. His clinical interests include caring for patients and families with heart failure, including those with left ventricular assist devices and heart transplants. He is involved in and leads multiple large studies of patients with heart failure at both Duke University Medical Center and the Duke Clinical Research Institute. He currently serves as the medical director of the Duke Heart Transplant program.
He attended medical school at the University of Chicago Pritzker School of Medicine and completed internal medicine residency at Brigham and Women’s Hospital. He then pursued cardiology training at Duke University and solidified his interests in clinical research and heart failure. He completed a research fellowship at the Duke Clinical Research Institute and a Masters of Health Sciences in Clinical Research before completing an advanced heart failure fellowship at Duke University.
The overarching goals of his research are to advance the current understanding of heart failure through clinical trials as well as develop an evidence base for implementation strategies that addresses the gap between heart failure trial results and clinical practice. For example, he has served on the Steering Committees for large clinical trials, including PIONEER-HF and SPIRRIT-HFpEF. Dr. DeVore also published the first clinical trial conducted within the American Heart Association’s Get With The Guidelines-Heart Failure program, a registry-based cluster randomized trial of quality improvement interventions. He was also the principal investigator for CONNECT-HF, a large-scale, pragmatic, cluster-randomized trial at 161 sites in the US evaluating heart failure quality improvement initiatives. Outside of his work on heart failure, Dr. DeVore is married with 4 children and spends his time corralling them all and coaching youth baseball.
Jacob Niall Schroder
Sudarshan Rajagopal
I am a physician-scientist with a research focus on G protein-coupled receptor signaling in inflammation and vascular disease and a clinical focus on pulmonary vascular disease, as I serve as Co-Director of the Duke Pulmonary Vascular Disease Center. My research spans the spectrum from clinical research in pulmonary vascular disease, to translational research in cardiovascular disease, to the basic science of receptor signaling.
Our basic science research focuses on understanding and untapping the signaling potential of G protein-coupled receptors (GPCRs) to regulate inflammation in vascular disease. GPCRs are the most common transmembrane receptors in the human genome (over 800 members) and are some of the most successful targets for drug therapies. While it has been known for some time that these receptors signal through multiple downstream effectors (such as heterotrimeric G proteins and multifunctional beta arrestin adapter proteins), over the past decade it has been better appreciated that these receptors are capable of signaling with different efficacies to these effectors, a phenomenon referred to as “biased agonism”. Ligands can be biased, by activating different pathways from one another, and receptors can be biased, by signaling to a limited number of pathways that are normally available to them. Moreover, this phenomenon also appears to be common to other transmembrane and nuclear receptors. While a growing number of biased agonists acting at multiple receptors have been identified, there is still little known regarding the mechanisms underlying biased signaling and its physiologic impact. We use multiple approaches to probe these signaling mechanisms, including in-house pharmacological assays, advanced phosphoproteomics and single cell RNA sequencing.
Our translational research is focused on studying signaling in different forms of pulmonary hypertension (PH), a disease of the pulmonary vasculature that results in right heart failure. We have identified novel molecular mechanisms that contribute to the development of pulmonary arterial hypertension (PAH), a disease of the pulmonary arterioles. We have also used single cell RNA sequencing to identify the cell types and signaling pathways that contribute to chronic thromboembolic pulmonary hypertension (CTEPH).
Lastly, our clinical research program focuses on the application of novel imaging technologies for diagnosis, prognosis and management of PH. Most notably, this includes the application of hyperpolarized Xenon MRI, in collaboration with Dr. Bastiaan Driehuys in the Department of Radiology, to characterizing the physiological basis of gas exchange and hemodynamic abnormalities across all forms of PH. In collaboration with Dr. Fawaz Alenezi, we have applied advanced echo approaches for the management of PH.
Svati Hasmukh Shah
Carmelo Alessio Milano
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