Endovascular treatment of pulmonary embolism: Selective review of available techniques

Figure 11 Miller Score. Pulmonary arteriogram demonstrating left main pulmonary artery embolus (obstruction score 7) and severely reduced perfusion of the upper and middle zones of the left lung (perfusion index 2 + 2). There is occlusion of the left lower lobe pulmonary and middle lobe pulmonary artery (obstructive score 4 + 2) with perfusion severely reduced in the lower lobe and mildly reduced in the middle lobe (perfusion index 2 + 1). This patients combined Miller score is therefore 20.