Fig. 2
From: How to manage various arrhythmias and sudden cardiac death in the cardiovascular intensive care
A case (67Â years old, male) with a VT/VF storm that emerged during the acute phase of an anterior infarction (4th day). Left panel: The monitored ECG recording revealed that this polymorphic tachycardia was always initiated by PVCs with exactly the same QRS morphology with a relatively narrow configuration. Right panel: Detailed LV mapping demonstrated that the Purkinje potentials (indicated by the red arrows) from the posterior fascicular region preceded the onset of the QRS complex by 55Â ms during the PVCs. HBE His bundle electrogram, P Purkinje potential, RBB right bundle branch potential, H His potential