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Fixed Obstacle Model of Re-Entrant Ventricular Tachycardia
Dark areas correspond to fixed obstacles. Colored arrows from red to violet denote earlier to later activation. Channels through which conduction occurs are white areas between the unexcitable obstacles (arrows from red to yellow). Propagation of the activation wavefront also occurs along the outer circuit pathway (arrows from green to violet). AandB show examples of the fixed obstacle model.
