Figure 5From: Fusion beat in patients with heart failure treated with left ventricular pacing: may ECG morphology relate to mechanical synchrony? A pilot studyDFT showed a statistically significant increase corresponding to AV 4, the shortest AV interval. The mean value of DFT corresponding to AV3 and AV4 was also statistically significant compared to the LBBB pattern, showing an increase >10%.Back to article page