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Figure 3 Bar graph demonstrating the occurrence of VF as a result of 30-mph baseball impacts with respect to different sites on the chest wall of swine in our experimental model of commotio cordis. Ventricular fibrillation was produced only by impacts directly over the cardiac silhouette with the highest incidence evident at the center of the LV. Ventricular fibrillation was not produced with impacts at the right and left lateral (Lat) or the right and left posterior (Post) chest wall sites. LV = left ventricle; VF = ventricular fibrillation.