1. , , , et al. ACC/AHA/ASE 2003 guideline update for the clinical application of echocardiography: summary article. A report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines (ACC/AHA/ASE Committee to Update the 1997 Guidelines for the Clinical Application of Echocardiography). Circulation 2003; 108: 1146–62.
2. , , , et al. Working Group on Echocardiography of the European Society of Cardiology. Guidelines from the Working Group. Recommendations for performing transesophageal echocardiography. Eur J Echocardiogr 2001; 2: 8–21.
3. , , , et al. Practice guidelines for perioperative transesophageal echocardiography: an updated report by the American Society of Anesthesiologists and the Society of Cardiovascular Anesthesiologists Task Force on Transesophageal Echocardiography. Anesthesiology 2010.
4. , , , et al. for the European Association of Echocardiography. Recommendations for transoesophageal echocardiography: update 2010. Eur J Echocardiogr 2010; in press.