IJCS | Volume 32, Nº5, September/October 2019

470 1. Wann LS, Curtis AB, January CT, Ellenbogen KA, Lowe JE, Estes NA,et al; ACCF/AHA Task Force Members. 2011 ACCF/AHA/HRS focused update on the management of patients with atrial brillation (Updating the 2006 Guideline): a report of the American College of Cardiology Foundation/American Heart Association Task Force on Practice Guidelines. Circulation. 2011;123(1):104–23. 2. Kirchhof P, Benussi S, Kotecha D, Ahlsson A, Atar D, Casadei B, et al; 2016 ESC Guidelines for the management of atrial fibrillation developed in collaboration with EACTS. Eur Heart J. 2016;37(38)2893–962. 3. Di Biase L, Santangeli P, Anselmino M, Mohanty P, Salvetti I, Gili S, et al . Does the left atrial appendage morphology correlate with the risk of stroke in patients with atrial fibrillation? Results from a multicenter study. J Am Coll Cardiol. 2012; 60(6):531-8. 4. Leung DY, Black IW, Cranney GB, Hopkins AP, Walsh WF. Prognostic implications of left atrial spontaneous echo contrast in nonvalvular atrial fibrillation. J Am Coll Cardiol. 1994;24(3):755-62. 5. Wang Y, Di Biase L, Horton RP, Nguyen T, Morhanty P, Natale A. Left atrial appendage studied by computed tomography to help planning for appendage closure device placement. J Cardiovasc Electrophysiol. 2010;21(9):973-82. 6. Moore KL, Persaud TVN. The Developing Human. Clinically Oriented Embryology. 6th edition. Philadelphia, PA: WB Saunders Company, 1998. 7. Lip GY, Nieuwlaat R, Pisters R, Lane DA, Crijns HJ. Refining clinical risk stratification for predicting stroke and thromboembolism in atrial fibrillation using a novel risk factor-based approach: the euro heart survey on atrial fibrillation. Chest. 2010;137(2):263–72. 8. Chao TF, Lin YJ, Tsao HM, Tsai CF, Lin WS, Chang SL, et al. CHADS(2) and CHA(2)DS(2)-VASc scores in the prediction of clinical outcomes in patients with atrial brillation after catheter ablation. 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Poçi D, HartfordM, Karlsson T, Herlitz J, EdvardssonN, Caldahl K. Role of the CHADS2 score in acute coronary syndromes – risk of subsequent death or stroke in patients with and without atrial fibrillation. CHEST. 2012;141(6):1431-40. 14. Providência R , Botelho A , Trigo J, Quintal N, Nascimento J, Mota P, et al. Possible refinement of clinical thromboembolism assessment in patients with atrial fibrillation using echocardiographic parameters. Europace. 2012;14(1):36–45. 15. Willens HJ, Gómez-Marín O, Nelson K, D Nicco A, Moscucci M. Correlation of CHADS2 and CHA2DS2-VASc scores with transesophageal echocardiography risk factors for thromboembolism in a multiethnic United States populationwith nonvalvular atrial fibrillation. Am Soc Echocardiogr. 2013;26(2):175-84. 16. Parikh MG, Aziz Z, Krishnan K, Madias C, Trohman RG. Usefulness of transesophageal echocardiography to confirm clinical utility of CHA2DS2-VASc and CHADS2 scores in atrial flutter. J Cardiol. 2012;109(4):550-5. 17. Lang RM, Badano LP, Mor-Avi V, Afilalo J, Armstrong A, Ernande L, et al. Recommendations for cardiac chamber quantification by echocardiography in adults: An update from the American Society of Echocardiography and the European Association of cardiovascular imaging. J Am Soc Echocardiogr. 2015;28(1):1-39.e14. 18. Hahn RT, Abraham T, Adams MS, Bruce CJ, Glas KE, Lang RM, et al. guidelines for performing a comprehensive transesophageal echocardiographic examination: Recommendations from the American Society of Echocardiography and the Society of Cardiovascular Anesthesiologists. J Am Soc Echocardiogr. 2013;26(9):921-64. References This is an open-access article distributed under the terms of the Creative Commons Attribution License Linhares et al. Transesophageal echocardiography and CHA2DS2-Vasc score Int J Cardiovasc Sci. 2019;32(5):460-470 Original Article Potential Conflict of Interest No potential conflict of interest relevant to this article was reported. Sources of Funding There were no external funding sources for this study. Study Association This study is not associated with any thesis or dissertation work. Ethics approval and consent to participate This study was approved by the Ethics Committee of the Instituto Dante Pazzanese de Cardiologia, São Paulo - Brasil , under the protocol number 875.528. All the procedures in this study were in accordance with the 1975 Helsinki Declaration, updated in 2013. Informed consent was obtained from all participants included in the study.