http://www.prutchi.com/pdf/implantable/nuclear_pacemakers.pdf http://www.prutchi.com/pdf/implantable/nuclear_pacemakers.pd... Last paragraph on page 2... quite

http://www.prutchi.com/pdf/implantable/nuclear_pacemakers.pdf http://www.prutchi.com/pdf/implantable/nuclear_pacemakers.pd... Last paragraph on page 2... quite a long damned time; by 35 years it was still going strong.