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Figure 3 Survival rates without urgent heart transplantation in patients grouped according to the coupling between mean pulmonary artery pressure (PAP) and right ventricular ejection fraction (RVEF). Group 1 = normal PAP/preserved RVEF (n = 73); group 2 = normal PAP/low RVEF (n = 68); group 3 = high PAP/preserved RVEF (n = 21); and group 4 = high PAP/low RVEF (n = 215).