Effect of Position on Valsalva Maneuver: Supine vs. 20 Degree Position

od Vogel, Elizabeth R., Corfits, Jeanne L., Sandroni, Paola, Sletten, David M., Benarroch, Eduardo E., Fealey, Robert D., Suarez, Guillermo A., Gehrking, Tonette L., Gehrking, Jade A., Low, Phillip A.
Wydane 2008