Abstract
There is a lack of knowledge with regards to contemporary presentation, management, and outcomes of patients with venous thromboembolism (VTE). Many clinically important subgroups (including the elderly, those with recent bleeding, and pregnant patients) have been under-represented in clinical trials. Further, design of clinical trials is challenging in some scenarios, such as in those with hemodynamically-unstable pulmonary embolism (PE). RIETE (Registro Informatizado Enfermedad TromboEmbolica) is a large prospective multinational ongoing registry, designed to address these unmet needs using representative data from multiple centers. Initiated in Spain in 2001, RIETE currently includes 206 centers in 28 countries and has enrolled over 87,000 patients with VTE. The overarching goal is to improve the management of VTE through better understanding of prevention, as well as demographics, co-morbidities, treatment patterns, and outcomes of patients with VTE. RIETE has helped characterize the pattern of presentation and outcomes of VTE, including in the aforementioned understudied subgroups, in over 150 research articles. RIETE has recently expanded to collect long-term outcomes data, and has broadened its inclusion criteria to enroll other forms of venous thrombosis (such as cerebral vein thrombosis and splanchnic vein thrombosis). The RIETE platform is also being used to conduct pragmatic comparative effectiveness studies, including randomized trials. Future steps would focus on collaboration with additional centers across the world, and efforts to ensure the quality and expansion of the registry. It is expected that RIETE will continue to provide clinical evidence for understudied subgroups with VTE, and will have more prominent role for facilitation of multicenter (and multinational studies) that could be used for assessment of variations and disparities in care, quality improvement, and conducting comparative effectiveness research. RIETE is a large ongoing registry of patients with VTE and other thrombotic conditions. Its results could be helpful for improving our understanding of the epidemiology, patterns of care and outcomes of patients with thrombotic disease.
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