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Assessment of arrhythmic events in OR (n = 3) and OP (n = 5) rats. A: the duration of arrhythmic events evoked by intravenous epinephrine were greater in OP compared with OR rats. B: representative arterial pulse pressure trace in an OR and OP rat during an epinephrine challenge. Values are means ± SE. *P < 0.05 vs. OR.
