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Effects of acute Ova inhalation challenge on pulmonary C-fiber activity and cardiovascular responses to capsaicin in anesthetized and open-chest rats. Left and right: FA and cardiovascular responses to right atrial injection of capsaicin (0.5 μg/kg) in both control (○, n = 13) and sensitized (•, n = 15) rats before and 15–30 min after acute Ova challenge (3%, 5 min), respectively. HR, heart rate; MABP, mean arterial blood pressure. Dashed vertical line, time of capsaicin injection.
