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Figure 4 Cardiac MRI in Advanced PAH
Images of idiopathic PAH in a 32-year-old subject. The "D-shaped" left ventricle (LV) seen in panels A and B is due to elevated pulmonary pressures leading to dilation of the right ventricle (RV). The right atrium (RA) is also markedly dilated. The RV end-diastolic volume is 363 ml, and the RV ejection fraction is 20%. LA = left atrium; MRI = magnetic resonance imaging; other abbreviation as in Figure 2.
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