Ventricular conduction and long-term heart failure outcomes and mortality in African Americans: insights from the Jackson Heart Study.
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2015-03
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BACKGROUND: QRS prolongation is associated with adverse outcomes in mostly white populations, but its clinical significance is not well established for other groups. We investigated the association between QRS duration and mortality in African Americans. METHODS AND RESULTS: We analyzed data from 5146 African Americans in the Jackson Heart Study stratified by QRS duration on baseline 12-lead ECG. We defined QRS prolongation as QRS≥100 ms. We assessed the association between QRS duration and all-cause mortality using Cox proportional hazards models and reported the cumulative incidence of heart failure hospitalization. We identified factors associated with the development of QRS prolongation in patients with normal baseline QRS. At baseline, 30% (n=1528) of participants had QRS prolongation. The cumulative incidences of mortality and heart failure hospitalization were greater with versus without baseline QRS prolongation: 12.6% (95% confidence interval [CI], 11.0-14.4) versus 7.1% (95% CI, 6.3-8.0) and 8.2% (95% CI, 6.9-9.7) versus 4.4% (95% CI, 3.7-5.1), respectively. After risk adjustment, QRS prolongation was associated with increased mortality (hazard ratio, 1.27; 95% CI, 1.03-1.56; P=0.02). There was a linear relationship between QRS duration and mortality (hazard ratio per 10 ms increase, 1.06; 95% CI, 1.01-1.12). Older age, male sex, prior myocardial infarction, lower ejection fraction, left ventricular hypertrophy, and left ventricular dilatation were associated with the development of QRS prolongation. CONCLUSIONS: QRS prolongation in African Americans was associated with increased mortality and heart failure hospitalization. Factors associated with developing QRS prolongation included age, male sex, prior myocardial infarction, and left ventricular structural abnormalities.
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Mentz, Robert J, Melissa A Greiner, Adam D DeVore, Shannon M Dunlay, Gaurav Choudhary, Tariq Ahmad, Prateeti Khazanie, Tiffany C Randolph, et al. (2015). Ventricular conduction and long-term heart failure outcomes and mortality in African Americans: insights from the Jackson Heart Study. Circ Heart Fail, 8(2). pp. 243–251. 10.1161/CIRCHEARTFAILURE.114.001729 Retrieved from https://hdl.handle.net/10161/11076.
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Scholars@Duke

Robert John Mentz
I am a cardiologist with a clinical and research interest in heart failure (going from Failure to Function), including advanced therapies such as cardiac transplantation and mechanical assist devices or “heart pumps."
I serve our group as Chief of the Heart Failure Section.
I became a heart failure cardiologist in order to help patients manage their chronic disease over many months and years. I consider myself strongly committed to compassionate patient care with a focus on quality of life and patient preference.
I am the Editor in Chief of the Journal of Cardiac Failure - The official journal of the Heart Failure Society of America.
My research interests are focused on treating co-morbid diseases in heart failure patients and improving outcomes across the cardiovascular spectrum through clinical trials and outcomes research. Below, you will find my specific research interests:
- Cardiometabolic disease
- Co-morbidity characterization (diabetes, sleep apnea, renal failure) in heart failure
- Phenotypic characterization and risk prognostication of patients with heart failure
- Role of surrogate and nonfatal endpoints in clinical heart failure trials
- Biomarkers in heart failure
- Novel pharmacological and non-pharmacological approaches to heart failure
- Improving site-based heart failure research

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.

Zubin John Eapen
As director of the Duke Heart Failure Same-Day Access Clinic, I am dedicated to improving outcomes for patients with heart failure. This clinic allows patients to see a health care provider quickly, and receive treatments for relief of symptoms. I strive to help patients with heart failure avoid the emergency department and hospital when possible, and live better at home.
As director of education IT innovations in the Department of Medicine, I lead efforts in continuing medical education.

Emily O'Brien
Dr. Emily O’Brien is Associate Professor in Population Health Sciences, Associate Professor in Neurology, Core Faculty Member at Duke-Margolis Center for Health Policy, and Co-Director of Population Health Sciences at the Duke Clinical Research Institute. Her research focuses on comparative effectiveness, patient-centered outcomes, and pragmatic health systems research in cardiovascular and pulmonary disease. Her areas of expertise include: Epidemiology, Pragmatic Clinical Trials, and Clinical Decision Sciences. Dr. O’Brien received her PhD in Epidemiology from the University of North Carolina in Chapel Hill. As principal investigator for projects funded by the FDA, NIH, and PCORI, she has extensive experience working with diverse data sources including registries, epidemiologic cohorts, electronic health records, and administrative claims data. Dr. O’Brien teaches Analytic Methods in the Department of Population Health Sciences PhD program and has co-authored over 160 manuscripts in peer-reviewed journals on topics ranging from epidemiologic methods, comparative effectiveness, and pragmatic clinical trials. She is an associate editor for Circulation: Cardiovascular Quality and Outcomes, Chair of the AHA QCOR Scientific & Clinical Education Lifelong Learning Committee, social media editor for the Journal of the American Heart Association, and a fellow of the American Heart Association.

Kevin Lindsey Thomas

Lesley H. Curtis
Lesley H. Curtis is Professor in the Departments of Population Health Sciences and Medicine in the Duke School of Medicine and was inaugural chair of the Department of Population Health Sciences. A health services researcher by training, Dr. Curtis is an expert in the use of health care and Medicare claims data for health services and clinical outcomes research, and a leader in national data quality efforts. Dr. Curtis has led the linkage of Medicare claims with several large clinical registries and epidemiological cohort studies including the Framingham Heart Study and the Cardiovascular Health Study. Dr. Curtis currently serves as a senior policy advisor at the Food and Drug Administration supporting the Agency’s evidence generation initiative, and is co-PI of the NIH Pragmatic Trials Collaboratory, an NIH initiative to strengthen the national capacity for large-scale research studies embedded in health care delivery.
Areas of expertise: Health Services Research and Health Policy
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