Updated February 24, 2017. The mean or average birth weight in the United States is about 3,389g or 7 lb, 7.5 oz. However, any birth weight of a term newborn between 5 lbs, 8 oz and 8 lbs, 13 oz is considered to be normal. Baby Birth Weight Statistics.
Development of coronary stents. WALLSTENTÂ® (Schneider AG), a self-expanding, stainless steel wire-mesh structure, was the first coronary stent implanted in a human coronary artery by Sigwart et al. in 1986.
The first cardiac pacemaker was invented in the year 1950 by Canadian John Hopps. In the year 1958, Wilson Greatbatch invented the first implantable pacemaker. The internal pacemaker is a device that regulates the rhythm of the heart by using electrical impulses.he first cardiac pacemaker was invented in the year 1950 by Canadian John Hopps. In the year 1958, Wilson Greatbatch invented the first implantable pacemaker. The internal pacemaker is a device that regulates the rhythm of the heart by using electrical impulses.