D'Alonzo G E, Bower J S, Dantzker D R
Chest. 1984 Apr;85(4):457-61. doi: 10.1378/chest.85.4.457.
Twenty-five consecutive patients with obliterative pulmonary hypertension were studied. Primary pulmonary hypertension (17 patients) or chronic thromboembolic pulmonary hypertension (eight patients) was diagnosed by pulmonary angiography or autopsy. Clinical symptoms, physical findings, chest roentgenograms, electrocardiograms, and pulmonary function studies did not differentiate the patients with primary pulmonary hypertension (PPH) from those with chronic thromboembolic pulmonary hypertension (TPH). All eight patients with TPH had a lung scan interpreted as high probability for pulmonary emboli while all 17 patients with PPH had a lung scan interpreted as normal or low probability for emboli. While there was close clinical similarity between patients with PPH and TPH, the presence of a normal or low probability lung scan excluded the diagnosis of TPH.
对25例连续性闭塞性肺动脉高压患者进行了研究。通过肺血管造影或尸检诊断为原发性肺动脉高压（17例）或慢性血栓栓塞性肺动脉高压（8例）。临床症状、体格检查、胸部X线片、心电图和肺功能检查无法区分原发性肺动脉高压（PPH）患者和慢性血栓栓塞性肺动脉高压（TPH）患者。所有8例TPH患者的肺扫描结果显示肺栓塞高度可能，而所有17例PPH患者的肺扫描结果显示栓塞正常或可能性低。虽然PPH和TPH患者在临床上有密切相似性，但肺扫描结果正常或可能性低可排除TPH的诊断。
