Fig. 2

Diagram illustrating cardiac systolic and diastolic pressures and pericardial pressure during global tamponade, relative changes in pulmonary arterial and pulmonary venous blood flow, and pulmonary pooling of blood in A during spontaneous ventilation and in B during positive pressure ventilation. PP pericardial pressure, CVP central venous pressure, RV right ventricle, LA left atrium, LV left ventricle, PA pulmonary artery, PV pulmonary vein, ITP intrathoracic pressure. All pressures in mmHg