Pulmonary arterial resistance: noninvasive measurement with indexes of pulmonary flow estimated at velocity-encoded MR imaging--preliminary experience

Radiology. 1999 Sep;212(3):896-902. doi: 10.1148/radiology.212.3.r99au21896.


Cardiac output and pulmonary vascular resistance (PVR) were measured in 19 patients by means of catheterization of the right side of the heart. Results were compared with the cardiac output and indexes of pulmonary arterial blood flow estimated with velocity-encoded magnetic resonance (MR) imaging. Correlations were good between estimates with right-sided heart catheterization and those with velocity-encoded MR imaging. By providing accurate pulmonary arterial blood flow measurements, velocity-encoded MR imaging allowed distinction of patients with high PVR from subjects with normal PVR.

MeSH terms

  • Adult
  • Aged
  • Blood Flow Velocity / physiology*
  • Cardiac Output / physiology
  • Chronic Disease
  • Female
  • Humans
  • Hypertension, Pulmonary / diagnosis*
  • Hypertension, Pulmonary / physiopathology
  • Image Processing, Computer-Assisted*
  • Lung / blood supply*
  • Magnetic Resonance Imaging*
  • Male
  • Middle Aged
  • Pulmonary Wedge Pressure / physiology
  • Reference Values
  • Reproducibility of Results
  • Vascular Resistance / physiology*