Fig. 1From: Venous cannula occlusion during cardiopulmonary bypass recognized by ultrasonography of the internal jugular veinChanges in hemodynamics, state entropy, and BSR. The black line indicates the mean atrial pressure (MAP). The black dotted line represents the central venous pressure (CVP). The gray line indicates the state entropy. The gray dotted line represents the burst suppression ratio (BSR). The black arrow indicates the administration of thiopental. The gray area indicates the time during which cerebral congestion occurred. The entropy value increased gradually after the release of cerebral congestionBack to article page