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Clinical characteristics in lymphangioleiomyomatosis-related pulmonary hypertension: an observation on 50 patients |
Xiuxiu Wu1, Wenshuai Xu1, Jun Wang1, Xinlun Tian1, Zhuang Tian2, Kaifeng Xu1() |
1. Department of Respiratory Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China 2. Department of Cardiology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China |
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Abstract Lymphangioleiomyomatosis (LAM) is a rare diffuse cystic lung disease. Knowledge on LAM-related pulmonary hypertension (PH) is limited. This study aimed to analyze the clinical characteristics of LAM with elevated pulmonary artery pressure (PAP) and evaluate the potential efficacy of sirolimus. The study involved 50 LAM patients who underwent echocardiography. According to the tricuspid regurgitation velocity (TRV), these patients were divided into the TRV≤2.8 m/s group and TRV>2.8 m/s group. Both groups comprised 25 females with an average age of 38.6±8.1 and 41.5±8.9 years. In the TRV>2.8 m/s group, the estimated systolic PAP (SPAP) was significantly elevated (52.08±12.45 mmHg vs. 30.24±5.25 mmHg, P<0.01). Linear analysis showed that SPAP was correlated with forced expiratory volume in 1 s (FEV1), diffusing capacity of the lungs for carbon monoxide, alveolar arterial oxygen gradient (PA-aO2), and 6 min walking distance (r = −0.392, −0.351, 0.450, and −0.591, respectively; P<0.05), in which PA-aO2 was a risk factor for SPAP elevation (β = 0.064, OR= 1.066, P<0.05). Moreover, in 10 patients who received sirolimus therapy, SPAP decreased from 57.0±12.6 mmHg to 35.2±11.1 mmHg. The study showed that LAM patients with PH exhibit poor pulmonary function and hypoxemia and may benefit from sirolimus treatment.
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Keywords
lymphangioleiomyomatosis
pulmonary hypertension
pulmonary function
hypoxemia
sirolimus
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Corresponding Author(s):
Kaifeng Xu
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Just Accepted Date: 09 March 2018
Online First Date: 18 April 2018
Issue Date: 28 March 2019
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