21.   Doctors implanted a pacemaker in his chest and he recovered quickly.

22.   Doctors implanted a pacemaker in his chest.

23.   Doctors then implanted the defibrillator, which took about an hour.

24.   During the procedure, doctors often implant tiny tubes called stents to help keep arteries propped open.

25.   If repair of the valve is impossible, doctors will implant a mechanical substitute.

26.   Ted Williams remained hospitalized in fair condition Sunday, awaiting word on whether doctors would implant a heart pacemaker.

27.   The doctors then implant one or two of the embryos in the womb and freeze the others to use the next time, if the first try fails.

28.   The doctor also implanted a piece of silicone on the bridge of her nose to make it look less flat.

29.   The latest was a minor one in November, after which doctors implanted a tiny scaffold known as a stent to open an almost completely blocked artery.

30.   Then doctors implanted a pacemaker-like device to stimulate a part of his brain thought important for mood -- and that very day the man laughed.