Long-term safety, tolerability and efficacy of bosentan in adults with pulmonary arterial hypertension associated with congenital heart disease

Heart. 2007 Aug;93(8):974-6. doi: 10.1136/hrt.2006.089185.

Abstract

Objective: To examine long-term safety and efficacy of bosentan--an oral dual endothelin receptor antagonist--in patients with pulmonary hypertension associated with congenital heart disease or Eisenmenger's syndrome.

Design: Retrospective study.

Setting: Tertiary cardiology referral centre.

Patients: All adult patients with pulmonary arterial hypertension associated with congenital heart disease treated with bosentan at the Royal Brompton Adult Congenital Heart Centre were included.

Main outcome measures: Oxygen saturation, functional (WHO) class, 6-minute walk test distance and liver enzymes were analysed.

Results: Eighteen patients (14 female) with pulmonary arterial hypertension associated with congenital heart disease (15 patients with Eisenmenger's syndrome) with a mean (SD) age of 41 (9) years (range 23-69) were included. Median follow-up was 29 months (range 1-39). One patient died during follow-up. Patients tolerated bosentan well and no significant rise in liver transaminases was seen. Arterial oxygen saturation remained stable throughout follow-up. Mean (SD) functional class (p = 0.001) and the 6-minute walk test distance improved compared with baseline (284 (144) vs 363 (124) m, 380 (91) m and 408 (114) m at baseline, 0-6 months, 6-12 months and 1-2 years of treatment, respectively; p<0.05 for each).

Conclusions: Bosentan appears to be safe and well tolerated in adults with pulmonary arterial hypertension associated with congenital heart disease or Eisenmenger's syndrome during mid- to long-term follow-up. In addition, functional class and the 6-minute walk test distance improved and this effect was maintained for up to 2 years of bosentan treatment.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Aged
  • Antihypertensive Agents / therapeutic use*
  • Bosentan
  • Eisenmenger Complex / complications
  • Eisenmenger Complex / drug therapy
  • Eisenmenger Complex / physiopathology
  • Exercise Tolerance
  • Follow-Up Studies
  • Heart Defects, Congenital / complications
  • Heart Defects, Congenital / drug therapy*
  • Heart Defects, Congenital / physiopathology
  • Humans
  • Hypertension, Pulmonary / complications
  • Hypertension, Pulmonary / drug therapy*
  • Hypertension, Pulmonary / physiopathology
  • Middle Aged
  • Oxygen / blood
  • Safety
  • Sulfonamides / therapeutic use*

Substances

  • Antihypertensive Agents
  • Sulfonamides
  • Bosentan
  • Oxygen