Rationale and design of a study exploring the efficacy of once-daily oral rivaroxaban (X-TRA) on the outcome of left atrial/left atrial appendage thrombus in nonvalvular atrial fibrillation or atrial flutter and a retrospective observational registry providing baseline data (CLOT-AF)

NOTICE: this is the author’s version of a work that was accepted for publication. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published as Lip Gregory Y.H., Hammerstingl Christoph, Marin Francisco, Cappato Ricardo, Meng Isabelle Ling, Kirsch Bodo, Morandi Eolo, van Eickels Martin, Cohen Ariel, Rationale and design of a study exploring the efficacy of oncedaily oral rivaroxaban (X-TRA) on the outcome of left atrial/left atrial appendage thrombus in non-valvular atrial fibrillation or atrial flutter and a retrospective observational registry providing baseline data (CLOT-AF), American Heart Journal (2015), doi: 10.1016/j.ahj.2014.12.020