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Abstract #2818

Clinical utility of the pulmonary artery to ascending aortic ratio by cardiac magnetic resonance in patients with pulmonary hypertension.

Noriko Oyama-Manabe1, Osamu Manabe2, Ichizo Tsujino3, Hiroshi Ohira3, Tadao Aikawa4, Kohsuke Kudo1, and Noriko Oyama-Manabe1

1Diagnostic and Interventional Radiology, Hokkaido University Hospital, Sapporo, Japan, 2Nuclear Medicine, Hokkaido University Hospital, 3First Department of Medicine, Hokkaido University Hospital, 4Department of Cardiovascular Medicine, Hokkaido University Hospital

Thirty-three patients with pulmonary hypertension (PH) and age-, sex-matched 15 controls were retrospectively evaluated. The pulmonary artery to ascending aortic ratio (PA-A ratio) measured by cardiac MRI was significantly higher in PH patients than that in controls. The patients with pulmonary arterial hypertension showed a significantly higher PA-A ratio compared to patients with other causes of PH. Increased PA-A ratio showed significant correlations with right ventricular (RV) dilatation and decreased RVEF. The PA-A ratio showed high sensitivity and specificity for detection of PH. The PA-A ratio using cardiac MRI is an easy surrogate marker for detection of RV dysfunction and PH.

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