Non-contrast Enhanced Cardiac Magnetic Resonance Imaging in the Diagnosis and Classification of Pulmonary Hypertension (CMR-PH)
Pulmonary hypertension (PH) is a life-threatening cardiovascular disease characterized by pathological elevation of mean pulmonary arterial pressure (mPAP) >/= 25 mmHg at rest. mPAP < 20 mmHg is defined as normal, values in the range between 21-24 mmHg are described as "borderline PH" diagnosed by right heart catheterization. Based on the etiology, PH is assigned to 5 groups (WHO, Data Point, 2008), whereas classification of disease is an important prognostic and therapy-deciding criterion.
Cardiac magnetic resonance tomography (CMR) provides a reliable technique to estimate elevated mean pulmonary arterial pressure from period of existence of a vortical motion of blood flow in the main pulmonary artery. Vortex can be visualized in 3-dimensional vector field, particle trace and streamline representations and can be analysed with respect to vortex related measures (geometry of center, vortex formation, vorticity, propagation dynamics …). Furthermore T1-mapping and non-contrast enhanced lung perfusion/ventilation scans represent promising techniques for PH characterization.
Aim of this explorative study is to 1. analyse PH-associated blood flow characteristics in the heart and the surrounding great vessels with respect to the 5 groups of PH, and 2. investigate the hemodynamic state of "borderline PH" compared to normal mPAP and manifest PH by non-contrast CMR.
Elevated Mean Pulmonary Arterial Pressure
Normal Mean Pulmonary Arterial Pressure
Other: Cardiac MRI
|Study Design:||Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Diagnostic
|Official Title:||Non-contrast Enhanced Cardiac Magnetic Resonance Imaging in the Diagnosis and Classification of Pulmonary Hypertension|
- blood flow patterns [ Time Frame: 2 years ] [ Designated as safety issue: No ]fluid dynamical properties of blood flow patterns in the heart and surrounding great vessels associated with ethiology of PH
- myocardial magnetic relaxation times [ Time Frame: 2 years ] [ Designated as safety issue: No ]left and right ventricular myocardial T1 times associated with ethiology of PH
- pulmonary ventilation and perfusion [ Time Frame: 2 years ] [ Designated as safety issue: No ]pulmonary ventilation and perfusion associated with ethiology of PH
|Study Start Date:||December 2012|
|Estimated Study Completion Date:||December 2015|
|Estimated Primary Completion Date:||December 2014 (Final data collection date for primary outcome measure)|
Please refer to this study by its ClinicalTrials.gov identifier: NCT01725763
|Medical Unitersity Graz, Department of Radiology, Division of General Radiology|
|Graz, Styria, Austria, 8036|
|Principal Investigator:||Ursula Reiter, PhD||Medical Unitersity Graz, Department of Radiology, Division of General Radiology|
|Principal Investigator:||Michael Fuchsjäger, Prof. Dr.||Medical Unitersity Graz, Department of Radiology, Division of General Radiology|