In a 13-year girl with head injury the hemodynamic parameters during 2 episodes of intraventricular hemorrhage were monitored. There were hyperdynamic values for heart rate, Cardiac output, mean arterial and pulmonary artery pressures, systemic vascular and pulmonary vascular resistances. It is likely that centrogenic, sympathico-adrenergic reactions are the cause of pulmonary failure after isolated head injuries.
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