@article{article17583fbe,
title   = {Importance of Adequately Performed Valsalva Maneuver to Detect Patent Foramen Ovale during Transesophageal Echocardiography},
author = {Rodrigues, Ana Clara and Picard, Michael H. and Carbone, Aime and Arruda, Ana Lúcia and Flores, Thaís and Klohn, Juliana and Furtado, Meive and Lira-Filho, Edgar B. and Cerri, Giovanni G. and Andrade, José L.},
year = {2013},
doi = {10.1016/j.echo.2013.07.016},
journal   = {Journal of The American Society of Echocardiopgraphy}
}