ABSTRACT
There are more than 1 million primary hospitalizations for heart failure (HF) annually in the USA alone, and post-discharge outcomes remain persistently poor despite available therapies and quality improvement initiatives. Recent international randomized clinical trials in hospitalized HF have repeatedly failed to improve this post-discharge event rate. A potential reason for this persistent lack of clinical trial success that has not previously received significant attention relates to site selection and the generally low level of patient enrollment from the USA. Only ~5 % of US hospitals participate in clinical trials, and in four recent randomized trials of hospitalized HF, only one-third of patients were enrolled in North America. This poor participation among US centers has necessitated disproportionate enrollment from non-US sites. Regional variations in HF patient characteristics and clinical outcomes are well documented, and a lack of US patient representation in clinical trials limits the generalizability of results and presents obstacles for US regulatory agency approval. There are multiple impediments to successful US enrollment including a lack of incentive for investigators and institutions, the relative value unit-based compensation system, poor institutional framework for identification of appropriate patients, and increasing liability to conduct trials. In this manuscript, we specifically identify barriers to successful hospitalized HF clinical trial participation in the USA and suggest possible solutions.
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The opinions and information in this article are those of the authors and do not represent the views and/or policies of the US Food and Drug Administration.
Conflict of interest
JB.: Research support: National Institutes of Health, European Union, Health Resource Services Administration, Food and Drug Administration, Consultant: Amgen, Bayer, Celladon, Gambro, GE Healthcare, Janssen, Medtronic, Novartis, Ono, Relypsa, Trevena, Stock options: Stemedica; G. C. F.: Research AHRQ significant, NHLBI significant, Consultant: Novartis significant, Medtronic modest, Bayer modest, Gambro modest, Janssen modest; C. M. O.: none; M.A.P.: Research Support: Amgen, Celladon, Novartis, Sanofi-Aventis, Consultant: Aastrom, Abbott Vascular, Amgen, Cerenis, Concert, Fibrogen, GlaxoSmithKline, Hamilton Health Sciences, Medtronic, Merck, Roche, Servier, Teva, University of Oxford; M. R. M.: Consultant: Boston Scientific, St. Jude’s, Medtronic, Johnson and Johnson, ABIM, NIH/NHLBI, Baxter, Abbott Vascular, Thoratec; R. J. M. receives research support from Amgen, AstraZeneca, Bristol-Myers Squibb, GlaxoSmithKline, Gilead, Novartis, Otsuka, and ResMed; honoraria from Thoratec; and has served on an advisory board for Luitpold Pharmaceuticals, Inc; S. P. C.: Research support: NIH/NHLBI, Medtronic, Cardiorentis, Abbott Point-of-Care, Novartis, The Medicines Company, Astellas, Consultant: Trevena, Novartis, Otsuka, Radiometer, The Medicines Company, Medtronic, BRAHMS, Insys; J. J. V. M.: none; W. D. is a full time employee of Bayer Pharma; F. M. is a full time employee of Bayer Pharma; M. G.: Abbott Laboratories, Astellas, AstraZeneca, Bayer Schering Pharma AG, Cardiorentis Ltd, CorThera, Cytokinetics, CytoPherx, Inc, DebioPharm S. A., Errekappa Terapeutici, GlaxoSmithKline, Ikaria, Intersection Medical, INC, Johnson and Johnson, Medtronic, Merck, Novartis Pharma AG, Ono Parmaceuticals USA, Otsuka Pharmaceuticals, Palatin Technologies, Pericor Therapeutics, Protein Design Laboratories, Sanofi-Aventis, Sigma Tau, Solvay Pharmaceuticals, Sticares InterACT,Takeda Pharmaceuticals North America, Inc and Trevena Therapeutics; and has received significant (>$10,000) support from Bayer Schering Pharma AG, DebioPharm S.A., Medtronic, Novartis Pharma AG, Otsuka Pharmaceuticals, Sigma Tau, Solvay Pharmaceuticals, Sticares InterACT and Takeda Pharmaceuticals North America, Inc. All others authors report no conflicts of interest.
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Harinstein, M.E., Butler, J., Greene, S.J. et al. Site selection for heart failure clinical trials in the USA. Heart Fail Rev 20, 375–383 (2015). https://doi.org/10.1007/s10741-015-9473-z
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DOI: https://doi.org/10.1007/s10741-015-9473-z