Background: Qing-Dai (QD) treatment of patients with ulcerative colitis (UC) sometimes causes pulmonary arterial hypertension (PAH). However, the relationship of QD treatment to pulmonary arterial systolic pressure (PASP) in patients with UC has not been clarified.
Methods and results: The 27 patients with UC who were screened for PAH by transthoracic echocardiography (TTE) and underwent repeat TTE at 1 year were analyzed in this prospective observational study. Mean age was 44.0 years old, and median follow-up duration was 392. During the follow-up, 21 patients continued QD treatment (continuous group) and 6 patients discontinued the treatment (discontinuous group). In all patients, no significant difference in PASP levels between baseline and at follow-up was observed (21.4 vs. 21.3 mmHg, P=0.802). Furthermore, the mean PASP of patients in the continuous group did not differ from baseline to follow-up (21.4 mmHg to 22.6 mmHg, P=0.212); however, in the discontinuous group mean PASP was significantly decreased (21.5 mmHg to 16.8 mmHg, P=0.005). Moreover, changes in PASP from baseline to follow-up differed between the continuous and discontinuous groups (+1.1 mmHg vs. -4.7 mmHg, P=0.004). In addition, multivariable analyses revealed that only the duration of oral QD at baseline affected the increase of PASP.
Conclusions: In patients with UC, QD treatment may have an undesirable association with an increase in PASP.
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