[Effect of hydralazine on the respiratory function of the lungs and blood gas composition in patients with chronic obstructive bronchitis].

Hydralazine possesses a marked bronchodilating effect. In patients with bronchial obstruction determined by disorder of airway drainage function in combination with noticeable pulmonary sclerotic changes, the use of hydralazine in ineffective and can result in the deterioration of blood oxygenation. Hydralazine at a dose of 50 mg significantly exceeds euphylline at a dose of 0.3 g in the expression and duration of the bronchodilating effect.