Figure 2From: Novel insights on effect of atrioventricular programming of biventricular pacemaker in heart failure – a case seriesFigure shows the effect of shortening of AVD from 160 ms to 50 ms. E and A fusion seen during the hyperpneac phase of respiration at a heart rate of ≥ 90 bpm (Figure 1, panels A and B) when the AVD was programmed at 160 ms is no longer seen.Back to article page