title: Pulmonary endarterectomy for chronic thromboembolic pulmonary hypertension: preliminary exploration in China.
abstract: BACKGROUND
  Pulmonary endarterectomy is safe and effective surgical treatment for chronic thromboembolic pulmonary hypertension. This study aimed to evaluate the efficacy of pulmonary endarterectomy in treatment of thromboembolic pulmonary hypertension.
  
  
  METHODS
  A retrospective study of 15 patients who underwent pulmonary endarterectomy in Beijing Chaoyang Hospital was performed. Obvious pulmonary hypertension and hypoxemia were observed in all patients. Bilateral pulmonary endarterectomy was performed under cardiopulmonary bypass with profound hypothermic circulatory arrest.
  
  
  RESULTS
  Two patients (2/15) died of residual postoperative pulmonary hypertension and bleeding complication. The other 13 cases had significant decrease in systolic pulmonary artery pressure ((92.8 +/- 27.4) mmHg vs. (49.3 +/- 18.6) mmHg) and pulmonary vascular resistance ((938.7 +/- 464.1) dynesxsxcm(-5) vs. (316.8 +/- 153.3) dynesxsxcm(-5)), great improvement in cardiac index ((2.31 +/- 0.69) Lxmin(-1)xm(-2) vs. (3.85 +/- 1.21) Lxmin(-1)xm(-2)), arterial oxygen saturation (0.67 +/- 0.11 vs. 0.96 +/- 0.22) and mixed venous O(2) saturation (0.52 +/- 0.12 vs. 0.74 +/- 0.16) postoperatively compared to preoperative data. Mid-term follow-up showed that the cardiac function of all cases returned to NYHA class I or II, with great improvement in 6-minute walking distance ((138 +/- 36) m) and quality of life.
  
  
  CONCLUSIONS
  Bilateral pulmonary endarterectomy using cardiopulmonary bypass with the aid of deep hypothermia and circulatory arrest can effectively reduce pulmonary hypertension and provide good mid-term hemodynamic and symptomatic results with low surgical mortality rate and few complications.
authors.affiliation: Department of Cardiac Surgery, Beijing Chaoyang Hospital, Capital Medical University, China.
authors.forename: Song
authors.initials: S
authors.lastname: Gu
authors.forename: Yan
authors.initials: Y
authors.lastname: Liu
authors.forename: Pi-xiong
authors.initials: PX
authors.lastname: Su
authors.forename: Zhen-guo
authors.initials: ZG
authors.lastname: Zhai
authors.forename: Yuan-hua
authors.initials: YH
authors.lastname: Yang
authors.forename: Chen
authors.initials: C
authors.lastname: Wang
mesh_terms: D000293:Adolescent; D000328:Adult; D004452:Echocardiography; D004691:Endarterectomy / Q000009:adverse effects / Q000379:methods*; D005260:Female; D006439:Hemodynamics; D006801:Humans; D006976:Hypertension, Pulmonary / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D013923:Thromboembolism / Q000601:surgery*; D055815:Young Adult