Fig. 8From: Pathophysiology of right ventricular failure in acute pulmonary embolism and chronic thromboembolic pulmonary hypertension: a pictorial essay for the interventional radiologistDepiction of the effects of preload on output from the RV to the pulmonary arteries. If preload is decreased due to venous dilation and pooling of the blood in the dilated venous system, there is decreased filling of the RV and decreased available volume for outputBack to article page