Background and Purpose-Intracranial cerebral atherosclerosis causes ischemic stroke in a significant number of patients.Technological advances over the past 10 years have enabled endovascular treatment of intracranial atherosclerotic stenosis. The number of patients treated with angioplasty or stent-assisted angioplasty for this condition is increasing. Given the lack of universally accepted definitions, the goal of this document is to provide consensus recommendations for reporting standards, terminology, and written definitions when reporting clinical and radiological evaluation, technique, and outcome of endovascular treatment using angioplasty or stent-assisted angioplasty for stenotic and occlusive intracranial atherosclerosis. (PubMed) from January 1997 to December 2007 was conducted with the goal to identify published endovascular cerebrovascular interventional data in stenotic intracranial atherosclerosis that could be used as benchmarks for quality assessment. We sought to identify those risk adjustment variables that affect the likelihood of success and complications. This document offers the rationale for different clinical and technical considerations that may be important during the design of clinical trials for endovascular treatment of intracranial stenotic and occlusive atherosclerosis. Included in this guidance document are suggestions for uniform reporting standards for such trials. These definitions and standards are primarily intended for research purposes; however, they should also be helpful in clinical practice and applicable to all publications. Conclusion-In summary, the definitions proposed represent recommendations for constructing useful research data sets.
Summary of Report-ThisThe intent is to facilitate production of scientifically rigorous results capable of reliable comparisons between and among similar studies. In some cases, the definitions contained here are recommended by consensus of a panel of experts in this writing group for consistency in reporting and publication. These definitions should allow different groups to publish results that are directly comparable. (Stroke. 2009;40:e348-e365.)Key Words: anatomy Ⅲ angiography Ⅲ interventional neuroradiology Ⅲ neuroradiology Ⅲ reporting standard Ⅲ reporting terminology Ⅲ stenting T he goal of this writing group is to provide consensus recommendations for the arteriographic evaluation and endovascular treatment of intracranial atherosclerosis. These criteria are aimed to design clinical trials, to provide uniformity of definitions for appropriate selection and stratification of patients, and to allow analysis and meta-analysis of reported data. This document must not be construed as defining standardof-care. However, these reporting standards are intended for use in research protocols rather than for quality assessment in individual practice. These definitions represent one set of consensus recommendations for constructing useful research data sets. These definitions do not represent the only data that are important or useful i...