Figure 1From: RV work efficiency is greatly reduced in patients with pulmonary arterial hypertension as evidenced by 4D flow cardiac MRI(A) RV inflow and outflow of a control subject (left) and a PAH patient (right). (B) RV Efficiency for 13 study subjects. Mean RV efficiency of healthy subjects is significantly greater than that of PAH patients, with p-value = 0.007.Back to article page