Non-invasive Diagnostics of Pulmonary Hypertension With Dual Energy Computed Tomography

Pulmonary Arterial Hypertension Clinical Trial

Official title:

Non-invasive Diagnostics of Pulmonary Hypertension With Dual Energy Computed Tomography - Pilot Study

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT01607489
• Other study ID #: 23-356 ex 10/11
• Status: Completed
• Phase: N/A
• First received: April 13, 2012
• Last updated: July 12, 2017
• Start date: June 2011
• Est. completion date: March 2017

Study information

• Verified date: July 2017
• Source: Medical University of Graz
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

The aim of the study is to determine relevant hemodynamic parameters for the diagnostics of pulmonary arterial hypertension (PAH) by dynamic contrast enhanced dual-energy CT (DE-CT). In this pilot study the investigators investigate patients who underwent right heart catheterisation with DE-CT to determine hemodynamic parameters and control the results by other clinical investigations. The investigators expect that using this non-invasive method, parameters relevant for the diagnosis of the patients with PAH, like pulmonary blood volume, blood flow and perfusion heterogeneity, can be determined.

Description:

Pulmonary arterial hypertension (PAH) is a rare, life-threatening disease. It is characterized by the elevation of pulmonary arterial pressure and pulmonary vascular resistance. A remodeling of small pulmonary vessels characterized by the proliferation of the adventitia, the hypertrophy of the media and fibrosis of the intima can be observed on the microscopic level.

Non-invasive techniques for hemodynamic assessment and identification of early pulmonary vascular remodeling and pulmonary hypertension have a marked practical advantage as compared to invasive right heart catheterization, however, their accuracy and reliability is not well established.

In the present study the investigators examine patients who underwent right heart catheterization and are scheduled for a thorax CT with an additional dynamic contrast-enhanced DE-CT protocol and derive established parameters for the diagnosis of PAH as well as novel parameters from the CT scans. These are compared to results from the right-heart catheterization and other investigations routinely carried out on these patients.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 25
• Est. completion date: March 2017
• Est. primary completion date: March 2017
• Accepts healthy volunteers: No
• Gender: All
• Age group: 18 Years and older

Eligibility

Inclusion Criteria:

• patients with right heart catheterization data

Exclusion Criteria:

• patients with decreased renal function

• patients who received CT in the previous six months

• intolerance of contrast material

• other standard CT contraindications

Related Conditions & MeSH terms

• Familial Primary Pulmonary Hypertension
• Hypertension
• Hypertension, Pulmonary
• Pulmonary Arterial Hypertension

Intervention

Radiation:
• Dual-energy computed tomography investigation
1x 20ml Ultravist (370mg J/ml)3-5ml/s, 1x 70ml Ultravist (370mg J/ml)3-5ml/s Contrast agent administration

Locations

Country	Name	City	State
Austria	Medical University Graz, Division of Pulmonology	Graz	Steiermark

Sponsors (2)

Lead Sponsor	Collaborator
Medical University of Graz	Ludwig Boltzmann Gesellschaft

Country where clinical trial is conducted

Austria, 

References & Publications (3)

Helmberger M, Pienn M, Urschler M, Kullnig P, Stollberger R, Kovacs G, Olschewski A, Olschewski H, Bálint Z. Quantification of tortuosity and fractal dimension of the lung vessels in pulmonary hypertension patients. PLoS One. 2014 Jan 31;9(1):e87515. doi: — View Citation

Pienn M, Kovacs G, Tscherner M, Avian A, Johnson TR, Kullnig P, Stollberger R, Olschewski A, Olschewski H, Bálint Z. Non-invasive determination of pulmonary hypertension with dynamic contrast-enhanced computed tomography: a pilot study. Eur Radiol. 2014 M — View Citation

Pienn M, Kovacs G, Tscherner M, Johnson TR, Kullnig P, Stollberger R, Olschewski A, Olschewski H, Bálint Z. Determination of cardiac output with dynamic contrast-enhanced computed tomography. Int J Cardiovasc Imaging. 2013 Dec;29(8):1871-8. doi: 10.1007/s — View Citation

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Pulmonary blood flow and volume determined by dual energy computed tomography	determination of differences in pulmonary blood flow and volume of pulmonary hypertension patients	measurements with right heart catheterisation within 1 month
Secondary	Comparison of dual energy computed tomography derived data with clinical findings of pulmonary hypertension patients	comparison of different state or type of pulmonary hypertension	measurements with right heart catheterisation within 1 month
Secondary	Lung perfusion heterogeneity determined by dual energy computed tomography	quantification of regional perfusion differences in pulmonary hypertension patients	measurements with right heart catheterisation within 1 month