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肺动脉高压可分为原发性和继发性两类。世界卫生组织规定的原发性肺动脉高压的标准:平均肺动脉压必须超过25毫米汞柱。日本学者则认为,许多肺动脉高压患者虽已出现严重症状,但静息时平均肺动脉压仍未超过25毫米汞柱,因此,建议把这一标准规定为20毫米汞柱。本病病因不明,特征是肺血管阻力和肺动脉压明显增高,多在20～40岁起病,发病率女性为男性的2.5～3倍。但我国两性的发病率则相近,甚至男性比女性更高。有些患者有家族性因素,表现为同胞兄弟先后发病。继发性肺动
Pulmonary hypertension can be divided into primary and secondary categories. The WHO standard for primary pulmonary hypertension: mean pulmonary arterial pressure must exceed 25 mmHg. Japanese scholars believe that although many patients with pulmonary hypertension have severe symptoms, resting mean arterial pressure does not exceed 25 mm Hg. Therefore, it is recommended that this standard be set at 20 mm Hg. The etiology of this disease is unknown, characterized by pulmonary vascular resistance and pulmonary hypertension was significantly increased, mostly in the 20 to 40-year-old onset, the incidence of men 2.5 to 3 times as men. However, the incidence rates of both sexes are similar in our country, and even men are higher than women. Some patients have familial factors, manifested as siblings have onset. Secondary pulmonary movement