21.   His heart stopped beating, but doctors shocked him back to life and later did a procedure to reopen the blocked artery.

22.   If it can be shown that blood flows freely into the heart even under stress, then it may not be necessary to bypass even seriously blocked arteries.

23.   In angioplasty, doctors insert balloon-tipped tubes in a blocked artery.

24.   In the heart, that means doctors would rather unclog a blocked artery than build a new vessel to bypass it.

25.   In March, he underwent angioplasty to clear a blocked artery.

26.   In the not-too-distant future, nanotech could be used to repair a blocked artery or a damaged kidney without surgery.

27.   Indications are that he has at least one blocked artery.

28.   It has products used in angioplasty, the balloon treatment to open blocked arteries, and in angiography to diagnose heart problems.

29.   Lasers are now commonly used to vaporize cancerous tumors, cauterize ulcers and open blocked arteries.

30.   Last November, Cheney suffered a mild heart attack after which doctors inserted a stent to open a blocked artery.