Rebuttal from Daniel Beard and Eric Feigl.

Dr. Andrew’s proposal (Andrew, 2013) to rename Guyton’s venous return curve the ‘venous pressure curve’ seems unlikely to overcome the decades of misinterpretation and confusion that the Guytonmodel of the systemic circulation has engendered. In Guyton’s experiments venous return curves were produced with a pump connected from the right atrium to the pulmonary artery in an anaesthetized, open chest, horizontal, acute preparation. Paired data points of flow and right atrial pressure were obtained. Guyton fitted the data pairs with a four-parameter model, consisting of arterial and venous resistances and capacitances. The model fitted the data at