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. 2017 Dec 13;16(2):55–64. doi: 10.1007/s12574-017-0364-2

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© The Author(s) 2017

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Fig. 3 — Upper panel: recordings of LV and LA pressures and pulmonary venous flow in a patient prior to coronary artery bypass surgery (same patient as in Fig. 2). Lower panel: S ₁ and D represent atrial filling by suction caused by fall in LA pressure, and S ₂ represents filling caused predominantly by pushing from the RV systolic pressure pulse [6]