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Background: Acute vasoreactivity testing (AVT) which reflects the compliance of the pulmonary vascular bed has been proven to be of prognostic value. The purpose of the present study is to explore the sex differences of hemodynamics during the AVT and their impact on event‐free survival in patients with chronic thromboembolic pulmonary hypertension (CTEPH). Methods: Eighty‐six patients underwent a right heart catheterization and AVT at Shanghai Pulmonary Hospital from February 2009 to February 2018. Univariate and multiple stepwise regression analysis were performed to determine the predictors of independent event‐free survival, and receiver operating characteristic curve was plotted to determine the cut‐off value of independent parameters in CTEPH. Results: There were no significant differences in both demographics and hemodynamics between male and female patients with CTEPH. Except ΔPVR/PVR showed a significantly higher difference in female than male patients (P = 0.034). Male patients had higher mRAP of pre‐ and post‐AVT than female patients in the event‐free subgroup, while, female patients showed higher PVR of pre‐AVT than male patients in the event subgroup (P < 0.05). The mRAP and SvO2 were independent predictors of event‐free survival in female patients both before and after the AVT, whereas ΔSvO2 was an independent predictor of event‐free survival in male patients. Conclusion: Hemodynamics during the AVT varied between male and female patients with CTEPH. Both sexes displayed unique hemodynamic responses that were independently able to predict event‐free survival. Therefore, better estimates of prognosis in CTEPH can be made when sex differences are also taken into consideration. [ABSTRACT FROM AUTHOR]

Abstract: Background: Pulmonary hypertension (PH) is an important complication of interstitial lung disease (ILD). The aim of the present study was to investigate characteristics and prognosis of ILD associated PH in a predominantly Chinese patient cohort. Methods: Consecutive patients with ILD associated PH, confirmed by right heart catheterization at shanghai pulmonary hospital were included in the study. Characteristics at baseline and during follow‐up, as well as survival, were analyzed. Results: This observational study was conducted in 26 patients with a mean age of 60.0 ± 12.2 y old. The 6‐min walking distance was 335.0 ± 190.9 m. The mean pulmonary arterial pressure (PAP) was 42.9 ± 10.9 mmHg, cardiac output was 4.4 ± 1.0 L/min, and pulmonary vascular resistance (PVR) was 8.6 ± 4.1 Wood Units. The mean PAP was ≥35 mmHg in 69.2% of cases. There were no difference in lung function parameters between ILD with PH and ILD without PH. The overall survival rate was 92% at 1 y, 82% at 3 y, and 62% at 5 y. PVR was the only variable significantly associated with death. Conclusions: Severe hemodynamic impairment along with PH can occur in patients with ILD. These patients have more severely impaired exercise capacity and cardiac function than ILD patients without PH. PVR was the only prognostic factor identified in this group of patients. [ABSTRACT FROM AUTHOR]