how was the first pacemaker made
This discovery led to the invention in 1950 of that of a pacemaker. The first pacemaker was too big to fit in human body internally. It was first tested in 1949 at the University of Torontoâs Department of Surgery on a dog.The earliest form of catheter electrodes used vacuum tubes that were later replaced by transistors. The first implant of pacemaker in human was done in 1958.Hoops himself became a heart patient and in 1984 he had pacemaker implanted so as to keep his heart regulated but by then it was considered a normal surgery. He got his pacemaker replaced after thirteen years of his first surgery.oops himself became a heart patient and in 1984 he had pacemaker implanted so as to keep his heart regulated but by then it was considered a normal surgery. He got his pacemaker replaced after thirteen years of his first surgery.