Autor: Professor Marko Turina, University Hospital, Zurich
Título: This is the first pacemaker to ever be implanted
Data: 9 de Abril de 2009
Fonte: https://commons.wikimedia.org/wiki/File:First_pacemaker_(Siemens-Elema_1958).jpg
Licença: https://creativecommons.org/licenses/by/3.0/deed.en