ABSTRACT
Introduction: We evaluated the effect of combination therapy with thromboxane A2 synthesis inhibitor and leukotriene receptor antagonist in a patient with exercise-induced asthma using krypton-81m ventilation scintigraphy.
Clinical Picture: In a patient with exercise-induced asthma, we found exercise-induced abnormalities of respiratory function test and ventilation scintigraphy, and increases in plasma concentrations of thromboxane B2 and leukotriene C4 with exercise. Treatment: A thromboxane A2 synthesis inhibitor (ozagrel) and a leukotriene receptor antagonist (pranlukast) were prescribed. Outcome: After treatment for 2 weeks, abnormalities of respiratory function test and ventilation scintigraphy improved. Conclusions: The combination therapy with ozagrel and pranlukast might be useful for the relief of symptoms in patients with exercise-induced asthma, and krypton-81m ventilation scintigraphy could be a useful tool for visible evaluation of treatment.Exercise is a common stimulus of bronchoconstriction in subjects with asthma. Exercise-induced asthma is a temporary increase in airway resistance that occurs after several minutes of strenuous exercise, usually after the exercise has ceased.
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