The time course of mean left ventricular (LV) volumes (mean ± SEM) during untreated VF in both normothermia and hypothermia swine. *Ventricular volume differs between the two groups with less dilation of hypothermia group (p < 0.05). #Ventricular volume differs between the two groups with less contracture in the hypothermia group (p < 0.001). The dashed and dotted line represents baseline LV volumes at VF onset. The even dashed line represents LV volume at stone heart. The thin arrow represents time to stone heart in normothermia group. The thick arrow represents time to stone heart in hypothermia group.