Methods: The clinical data of 6 patients with primary pulmonary hypertension were collected and analyzed.Clinical diagnosis was made by ways of electrocardiography, ultrasound, and X-ray.

• 方法：对6例确诊为原发性肺动脉高压患儿从临床症状和体征、辅助检查、心导管和心血管造影术等方面进行分析。