Figure 4From: Sequential biventricular pacing improves regional contractility, longitudinal function and dyssynchrony in patients with heart failure and prolonged QRS The best VV-interval after optimization in each patient in this study (n = 21). With sequential pacing least dyssynchrony standard deviation of aortic valve opening to systolic maximal velocity (AVO-SMV/SD) was reached in 13 patients (62%).Back to article page