1.   But it was soon clear that his arteries had narrowed again.

2.   It provides a visual image of the carotid arteries, showing how much the arteries have narrowed due to buildup of plaque.

3.   That artery narrowed again, requiring another procedure to reopen it in March.

4.   The penis, meanwhile, grows increasingly sluggish, as its spongelike erection chambers fill with connective tissue and its supporting arteries narrow.

5.   Then he is to place a balloon catheter into the area where the artery narrows.

6.   Blood would speed up in areas where the artery narrows because of blockage.

7.   But new clots can form after balloon angioplasty, or the artery can narrow again, while drugs carry a significant risk of serious bleeding and stroke.

8.   Doctors repeated the procedure in mid-March after tests showed the artery was narrowing again.