In a porcine model of ventricular fibrillation, mapping studies suggest the mother rotor may be located at the insertion of the posterior papillary muscle into the LV free wall rather than the epicardium or septum.
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Porcine VF mapping does not identify a mother rotor on epicardium or septum; leaves open papillary muscle insertion as a target for future studies.
Ideker et al. (2005) studied this question.
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