Abstract:
STUDY OBJECTIVES:we performed an open-label national study to evaluate the effects of Bosentan on haemodynamics, exercise capacity, quality of life, safety and tolerability in patients with chronic thromboembolic pulmonary hypertension (CTEPH). PATIENTS AND METHODS:fifteen patients with CTEPH not eligible or waiting for surgery were enrolled. The primary endpoint was the change in pulmonary vascular resistance (PVR). Secondary endpoints included quality of life (measured by the Minnesota living with heart failure questionnaire, MLHF), 6 minute walk distance (6MWD), World Health Organization (WHO) functional class, Borg dyspnoea scale, plasma endothelin, serum values of disease severity such as uric acid, N-terminal-pro brain natriuretic peptide (NTproBNP), C-reactive protein measured by a highly sensitive method (CRPs) and other serum and haemodynamic parameters. RESULTS:after six months of treatment with bosentan, the PVR decreased from 852 (319) to 657(249) dyn*s*m-5 (p = 0.02). Quality of life considerably improved from a mean total score of 48(14) to 35(17) (p = 0.003) with improvements in the physical (from 25(5) to 17(7)) and emotional (from 11(6) to 6(5)) subscores (p = 0.005 and 0.011), respectively. The 6MWD improved from 389(78) to 443(79) meters (p = 0.005). 4 patients (27%) improved and 11 patients (73%) maintained their WHO class with no deterioration during the six months of bosentan treatment (p = 0.02). Uric acid serum levels declined from 525(145) to 453(151) micromol/l (p = 0.006), NTproBNP and CRPs declined insignificantly. Endothelin serum levels increased from 4.3(1.5) to 5.9(2.2) pg/ml (p = 0.025). Patients tolerated the treatment well, and there were no severe adverse events or deaths. CONCLUSION:this open-label study suggests a beneficial effect of bosentan therapy not only on pulmonary haemodynamics, but also on quality of life and exercise capacity for patients with severe CTEPH.
journal_name
Swiss Med Wklyjournal_title
Swiss medical weeklyauthors
Ulrich S,Speich R,Domenighetti G,Geiser T,Aubert JD,Rochat T,Huber L,Treder U,Fischler Mdoi
2007/41/smw-11819subject
Has Abstractpub_date
2007-10-20 00:00:00pages
573-80issue
41-42eissn
1424-7860issn
1424-3997pii
smw-11819journal_volume
137pub_type
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