Accuracy of MR angiography compared with radionuclide scanning in identifying the cause of pulmonary arterial hypertension.

Abstract

MRA is useful in distinguishing patients with CTEPH from those with PPH. In this population, MRA had an accuracy that was identical to that of radionuclide scanning. Vascular and cardiac measurements made on MR scans reliably identified patients with PAH but did not distinguish between patients with CTEPH and those with PPH.