| Name | Info | Provider | Link |
|---|---|---|---|
| free resource | Ediciones Doyma, S.L. | http://www.revespcardiol.org/en/linksolver/ft/ivp/1579-2242/63/735 | |
| Pacemakers and Implantable Defibrillators | free resource | MedlinePlus Health Information | https://medlineplus.gov/pacemakersandimplantabledefibrillators.html |