Pacemaker the size of a large vitamin pill!:

http://medicalxpress.com/news/2013-12-world-smallest-medtronic-micra-pacemaker.html

Inserted through the femoral artery with a catheter, no need to cut and no leads floating around!

I guess it has some kind of micro sized battery but they didn't say the lifetime, but it would be a lot easier to extract than having open surgery.

Here is a video clip about the device:

http://www.kare11.com/story/news/2013/12/10/medtronic-testing-worlds-smallest-pacemaker/3981451/

My grandmother had to have one back when they were about the size of a mouse. Good to know they are getting smaller.

Around 1970 the classroom teacher brought in an elderly man to show us his hearing aid. He was proud of it, but it was mighty klutzy by today's standards. I seem to remember it was on a strap around his neck or waist, with a cable going up to earphones.

Originally posted by Paul Dirac II
My grandmother had to have one back when they were about the size of a mouse. Good to know they are getting smaller.

Around 1970 the classroom teacher brought in an elderly man to show us his hearing aid. He was proud of it, but it was mighty klutzy by today's standards. I seem to remember it was on a strap around his neck or waist, with a cable going up to earphones.

To say nothing of the 19th century version, a big horn. Of course that one never ran down the batteries either🙂