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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是:平均肺动脉压必须超过25mmHg;日本学者则认为,从治疗角度出发,建议把这一标准规定为20mmHg。继发性肺动脉压力增高和肺动脉高压则多起因于慢性支气管炎和肺气肿。
Pulmonary hypertension can be divided into primary and secondary categories. The WHO standard for primary pulmonary hypertension is: the average pulmonary arterial pressure must exceed 25mmHg; Japanese scholars believe that from the treatment point of view, it is recommended that this standard is 20mmHg. Secondary pulmonary hypertension and pulmonary hypertension are often caused by chronic bronchitis and emphysema.