Paroxysmal sympathetic hyperactivity (PSH) is a syndrome that comprises a series of signs and symptoms reflecting exacerbated sympathetic activity, including arterial hypertension, fever, tachycardia, generalized perspiration, anomalous motor activity (dystonia, muscle stiffness, extension), tachypnea, mechanical ventilator maladjustment, hypoxemia, hypercapnia, and hyperglycemia. PSH episodes can be intense and prolonged and can occur several times a day and all of these can lead to secondary brain damage and are the main causes of a poor prognosis. Paroxysmal sympathetic hyperactivity also induces a hypermetabolic state with hypercatabolism and inflammation and increases vulnerability to infections, sepsis, and weight loss which in turn are associated with increased morbidity, longer hospital stay, and slower recovery. The marked and sustained increase in catecholamine levels predisposes to the development of cardiomyopathy, lung edema, arrhythmias, and cardiac and multisystemic dysfunction. The reported incidence of paroxysmal sympathetic hyperactivity ranges from 8% to 33% and has no particular age or gender predilection. 80% of these syndrome incidents developed with traumatic brain injury.
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mortality rate of patients
Timeframe: 8 months