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    Does Duke Activity Status Index help predicting functional exercise capacity and long-term prognosis in patients with pulmonary hypertension?
    (W B Saunders Co Ltd, 2021) Mustafaoğlu, Rüstem; Demir, Rengin; Aslan, Gökşen Kuran; Sinan, Ümit Yaşar; Zeren, Melih; Küçükoğlu, Mehmet Serdar
    Background: To investigate the association of Duke Activity Status Index (DASI) with 6-minute walk test (6MWT) and WHO-Functional Class (WHO-FC) in patients with pulmonary hypertension (PH), as well as exploring whether DASI can discriminate between the patients with better and worse long-term prognosis according to 400 m cut-off score in 6MWT. Methods: Eighty-five medically stable PH patients who met eligibility criteria were included. All patients were evaluated using 6MWT and DASI. The prognostic utility of the DASI was assessed using univariate linear regression and receiver operating characteristic (ROC) curve analysis. Results: The DASI was an independent predictor for both 6MWT and WHO-FC, explaining 50% of variance in 6MWT and 30% of variance in WHO-FC class (p < 0.001). In addition, DASI significantly correlated to 6MWT (r = 0.702) and WHO-FC class (r = 0.547). The ROC curve analysis revealed that the DASI had a discriminative value for identifying the patients with better long-term prognosis (p < 0.001), with an area under ROC curve of 0.867 [95% CI = 0.782-0.952]. The DASI >= 26 was the optimal cut-off value for better long-term prognosis, having sensitivity of 0.74 and a specificity of 0.88. Conclusions: The DASI is a valid tool reflecting functional exercise capacity in patients with PH. Considering its ability to discriminate between the patients with better or worse long-term prognosis, it may help identifying the patients at higher risk.
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    Prevalence of musculoskeletal pain and its impact on quality of life and functional exercise capacity in patients with pulmonary arterial hypertension
    (W B Saunders Co Ltd, 2022) Zeren, Melih; Demir, Rengin; Sinan, Ümit Yaşar; Mustafaoğlu, Rüstem; Yıldız, Abdurrahim; Küçükoğlu, Mehmet Serdar
    Background: In pulmonary arterial hypertension (PAH), pathophysiological consequences of the disease and the drugs used to treat PAH may adversely affect musculoskeletal system. Aim of the study was to evaluate musculoskeletal pain prevalence and its impact on quality of life (QoL) and exercise capacity in PAH patients. Methods: 61 PAH patients were evaluated with Nordic Musculoskeletal Questionnaire (NMQ) for musculoskeletal pain presence, EmPHasis-10 and Minnesota Living with Heart Failure Questionnaire (MLHFQ) for QoL, 6-min walk test (6MWT) for functional exercise capacity and International Physical Activity Questionnaire-Short Form (IPAQ-SF) for physical activity participation. Results: 77% of PAH patients reported musculoskeletal pain. Pain prevalence was highest at low back (38%), followed by knees (36%), shoulders (36%) and neck (33%). Hemodynamic indicators of PAH severity were associated with pain presence in various parts of the body. Patients receiving any PAH-specific drug were more likely to experience pain compared to the patients whose drug therapy has not yet been initiated (RR = 1.6-2.0). Pain presence in neck, shoulder, low back and knees significantly correlated to worse QoL scores in both EmPHasis-10 and MLHFQ (p < 0.05). Pain presence in knees had the strongest influence on QoL, and it was the only significant correlate of 6MWT (r =-0.424) and IPAQ-SF (r =-0.264) (p < 0.05). Conclusions: Musculoskeletal pain is a common complaint in PAH patients, which significantly impairs QoL and physical functioning. Treatment strategies should include a more comprehensive assessment for musculoskeletal pain complaints of these patients and address pain presence accordingly, which may help providing a better management for PAH.