Department of Cardiology, Academic Medical Center, Amsterdam, the Netherlands
Department of Pulmonology, Academic Medical Center, Amsterdam, the Netherlands
Department of Cardiology, University Medical Center Nijmegen, the Netherlands
Department of Cardiology, University Medical Center Groningen, the Netherlands
Department of Paediatric Cardiology University Medical Center Groningen, the Netherlands
Departments of Cardiology, Academic Medical Center, Amsterdam and University Medical Center Utrecht, Utrecht, the Netherlands
B.J.M. Mulder Department of Cardiology, Rm B2–240, Academic Medical Center, PO Box 22660, 1100 DD Amsterdam, the Netherlands
Background. In patients with pulmonary hypertension, it is unknown whether the treatment effect of bosentan is dependent on the duration of pulmonary vessel changes. Therefore, we studied the response to bosentan in patients with life-long pulmonary vessel changes (pulmonary arterial hypertension (PAH) due to congenital heart disease (CHD)) and in patients with subacutely induced pulmonary vessel changes (chronic thromboembolic pulmonary hypertension (CTEPH)).
Methods. In this open-label study, 18 patients with PAH due to CHD and 16 patients with CTEPH were treated with bosentan for at least one year. All patients were evaluated at baseline and during follow-up by means of the six-minute walk distance (6-MWD) and laboratory tests.
Results. Improvement of 6-MWD was comparable in patients with PAH due to CHD (444±112 m to 471±100 m, p=0.02), and in CTEPH (376±152 m to 423±141 m, p=0.03) after three months of treatment. After this improvement, 6-MWD stabilised in both groups.
Conclusion. Although duration of pulmonary vessel changes is strikingly different in patients with PAH due to CHD and CTEPH, the effect of one year of bosentan treatment was comparable. The main treatment effect appears to be disease stabilisation and decreasing the rate of deterioration. (Neth Heart J 2009;17:334–8.)
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- Bosentan in pulmonary arterial hypertension: a comparison between congenital heart disease and chronic pulmonary embolism
M. G. J. Duffels
M. N. van der Plas
M. M. Winter
B. J. Bouma
A. P. J. van Dijk
E. S. Hoendermis
R. M. F. Berger
B. J. M. Mulder
- Bohn Stafleu van Loghum
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