肺静脉高压是当肺毛细血管－肺静脉压超过10mmHg（1.3kPa）时的状态。
结果：（1）胸片显示肺静脉高压；
Results: (1) Pulmonary venous hypertension was shown on chest radiography;
结论：酚妥拉明治疗肺咯血，对存在肺动脉，肺静脉高压且有肺淤血者，疗效最好。
Conclusion: Phentolamine produces the best therapeutic result in cases of hemoptysis with hypertension of pulmonary arteries or pulmonary veins accompanied by pulmonary blood stasis.
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