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Figure 2 Comparison of hemodynamic responses to stimulation at different sites and atrioventricular (AV) delays, shown as the mean (±SEM) percent changes from baseline in the 40 patients in whom hemodynamic recording was possible. The top plots represent changes in systolic function and bottom plots represent changes in diastolic function. BV = biventricular stimulation; LV = left univentricular stimulation; LVEDP = left ventricular end-diastolic pressure; max dP/dt = maximum rate of change in left ventricular pressure; min dP/dt = minimum rate of change in left ventricular pressure; RV = right univentricular stimulation. Legend symbols indicate statistical differences between stimulation sites over all AV delays (p < 0.001).  LV > RV and BV > RV;  LV > BV and RV > BV;  BV > LV.
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