Mean (+ SEM) time to onset of premature ventricular contractions (PVC), bigeminy, salvos, ventricular tachycardia (VT) and ventricular fibrillation (VF) following intravenous aconitine administration (5 μg/kg/min) following 4 weeks of chronic mild stress (CMS) or undisturbed control conditions. CMS reduced the onset time to PVC, salvo and VT (*P < 0.05 vs. respective control value). Modified from (Grippo et al., 2004), with permission, copyright 2004 American Physiological Society.