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  • Title: Survival and prognostic factors in patients with connective tissue disease-associated pulmonary hypertension diagnosed by echocardiography: results from a Korean nationwide registry.
    Author: Kang KY, Jeon CH, Choi SJ, Yoon BY, Choi CB, Lee CH, Suh CH, Lee CW, Cho CS, Nam EJ, Koh EM, Kim HY, Choi HJ, Kim HA, Jun JB, Lee J, Kim J, Ji JD, Min JK, Kim KJ, Shin K, So MW, Kwon SR, Kim SK, Nah SS, Kwok SK, Lee SK, Lee SW, Park SH, Park W, Park YB, Lee YH, Lee SS, Yoo DH.
    Journal: Int J Rheum Dis; 2017 Sep; 20(9):1227-1236. PubMed ID: 26214170.
    Abstract:
    OBJECTIVES: Pulmonary arterial hypertension (PAH) is a major cause of mortality in connective tissue disease (CTD). The survival rates and mortality-predictive factors of a nationwide registry of Korean patients with CTD-PH measured by echocardiography were determined. METHODS: Patients with CTD-PH were enrolled between April 2008 and December 2012. Hemodynamic parameters and clinical data (WHO-functional class [FC], organ involvement, laboratory tests and treatment agents) were recorded. Survival rates were calculated by using the Kaplan-Meier method. Mortality-associated factors were examined by Cox proportional hazards regression analysis. RESULTS: In total, 174 incident PH cases (61 with systemic lupus erythematosus, 50 with systemic sclerosis, 10 with mixed CTD, 22 with rheumatoid arthritis (RA) and 31 with other CTDs) were diagnosed by Doppler echocardiography. Of these, 25 (14%) died during the 3.8 ± 2.7 year follow-up period after PH diagnosis. The 1- and 3-year survival rates were 90.7% and 87.3%, respectively. Compared to the other CTD-PHs, RA-PH had the lowest survival rates (56% 3 year survival; P = 0.022). Multiple regression analysis revealed that low diffusion capacity of carbon monoxide (DLCO), pleural effusion and diabetes mellitus were poor prognostic factors (P = 0.008, 0.04 and 0.009, respectively). Anti-UI-RNP (ribonucleoprotein) antibody positivity was protective (P = 0.022). In patients with WHO-FC III/IV, patients who received vasodilators had lower mortality than those who did not (P = 0.038). CONCLUSIONS: In Korean patients with CTD-PH, the 3-year survival rate was 87%. Low diffusion capacity of carbon monoxide (DLCO), pleural effusion and diabetes mellitus were independent poor prognostic factors. Anti-UI-RNP antibody was protective. Prompt PAH-specific vasodilator therapy may improve the survival of patients with severe CTD-PH.
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