Figure 5.

Changes in the velocities in rise (upper) and drop (lower) of the unloading type (left) and auxotonic type (right) of tensile force (1) during an acute increase in left ventricular outflow resistance, addition of (2) 15 μg/min dobutamine (Dobu) and (3) 200 μg thiopental, both given intravenously, and (4) 1.5 (0.7) l saline given intravenously, and (5) withdrawal of the first 2 l of blood within 10 (23) minutes from the left atrium. Note the particularly significant response to inotropic interventions. *p < 0.05; **p < 0.01.