1.   Sales also were strong for the Palmaz-Schatz heart stent, a tiny metal device to prop open arteries that was introduced last year.

2.   His other inventions include the heart stent used by Vice President Dick Cheney and a radical improvement on old wheelchair designs.

3.   His other inventions include the heart stent used by Vice President Dick Cheney, a wheelchair that climbs stairs and the first portable kidney dialysis machine.

4.   His other inventions include the heart stent used by Vice President Dick Cheney and a wheelchair that can climb stairs.