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Epidemiological Study of Chronic Thromboembolic Pulmonary Hypertension in China

The recruitment status of this study is unknown. The completion date has passed and the status has not been verified in more than two years.
Verified February 2014 by Fourth Military Medical University.
Recruitment status was:  Recruiting
Information provided by (Responsible Party):
Shengqing Li, Fourth Military Medical University Identifier:
First received: October 26, 2012
Last updated: February 26, 2014
Last verified: February 2014
Chronic thromboembolic pulmonary hypertension (CTPH) is associated with considerable morbidity and mortality. Its incidence after pulmonary embolism and associated risk factors are not well documented in Chinese population. We conducted a prospective, long-term, follow-up study to assess the incidence of symptomatic CTPH in consecutive patients with an acute episode of pulmonary embolism but without prior venous thromboembolism. Patients with unexplained persistent dyspnea during follow-up underwent transthoracic echocardiography and, if supportive findings were present, ventilation-perfusion lung scanning and pulmonary angiography. CTPH was considered to be present if systolic and mean pulmonary-artery pressures exceeded 40 mm Hg and 25 mm Hg, respectively; pulmonary-capillary wedge pressure was normal; and there was angiographic evidence of disease.

To Assess the Long-term Risk for Adverse Events After PE.

Study Type: Observational
Study Design: Observational Model: Cohort
Time Perspective: Prospective

Resource links provided by NLM:

Further study details as provided by Fourth Military Medical University:

Primary Outcome Measures:
  • The cumulative incidence of symptomatic CTEPH [ Time Frame: 2 years ]

Secondary Outcome Measures:
  • Risk factors for Recurrent VTE and CTEPH [ Time Frame: 2 years ]

Estimated Enrollment: 400
Study Start Date: October 2012
Estimated Study Completion Date: October 2015
Estimated Primary Completion Date: October 2015 (Final data collection date for primary outcome measure)
Consecutive patients with acute PE


Ages Eligible for Study:   18 Years to 80 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Sampling Method:   Probability Sample
Study Population
Consecutive patients with an acute episode of pulmonary embolism but without prior venous thromboembolism.

Inclusion Criteria:

  • Patients with an episode of acute symptomatic pulmonary embolism without prior pulmonary embolism or venous thrombosis

Exclusion Criteria:

  • Have other diseases (e.g., systemic sclerosis or severe emphysema) that could have caused nonthromboembolic pulmonary hypertension,
  • Have preexisting exertional dyspnea,
  • Geographically inaccessible for follow-up,
  • Decline to participate in the study.
  Contacts and Locations
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Please refer to this study by its identifier: NCT01717092

Contact: Shengqing Li, MD, PhD +86-29-84771132

China, Shaanxi
Tangdu hospital Recruiting
Xi'an, Shaanxi, China, 710032
Contact: Yonghong Xie, MD    +86-29-84777725   
Xijing hospital Recruiting
Xi'an, Shaanxi, China, 710032
Contact: Yongping Yu, MD    +86-29-84771132   
Sub-Investigator: Yongping Yu, MD         
Sub-Investigator: Xinpeng Han, MD         
Sponsors and Collaborators
Fourth Military Medical University
  More Information

Responsible Party: Shengqing Li, MD, PhD, Associate Chief Physician, Associate Professor, Fourth Military Medical University Identifier: NCT01717092     History of Changes
Other Study ID Numbers: XJ-CTPH20121026
Study First Received: October 26, 2012
Last Updated: February 26, 2014 processed this record on April 28, 2017