However, the concepts proposed here do not limit the origin of the initiating PAs; these might have alternative origins, such as Purkinje fibers (Dosdall et al., 2007). The tunnel hypothesis is independent of the origin of wavefronts that propagate through it. The increase in isoelectric window after high strength shock can also be explained by the prolongation of the epicardial refractoriness (surface polarization), resulting in the longer tunnel propagation. This is because intramural virtual electrode polarization is lower magnitude than surface polarization (Entcheva et al., 1999) and thus the LV mid- myocardium, less affected by the shock, still. | Start-Up 09 2004 Edition SIMODRIVE base line A SIEMENS SIEMENS SIMODRIVE base line A Start-Up Technical Manual Introduction 1 Installation 2 Technical description 3 Servomotor 4 Valid for Servo Drive SIMODRIVE base line A 09. 2004 .
