Detection and quantification of pulmonary artery hypertension with MR imaging: results in 23 patients.

23 patients with pulmonary artery hypertension (causes: primary pulmonary hypertension [n=8], combined mitral valve disease [n=5], dilative cardiomyopathy [n=4], chronic pulmonary embolism [n=4], atrial septal defect [n=1], pulmonary fibrosis [n=1]) and 8 control subjects.

MR imaging (0.5-T magnet, multislice-multiphase spin-echo and fast gradient-echo sequences)

Pulmonary artery catheterization (for pressure verification) and healthy controls

Correlation between MR imaging measurements (right ventricular wall thickness, inferior vena cava diameter, main pulmonary artery diameter) and mean pulmonary artery pressure measured by catheterizationsurrogate