HeartSave ONE Professional defibrillators for emergency medicine. Reliable: always, everywhere. When every minute counts, PRIMEDIC™ defibrillators can help hearts stop missing another beat. Everywhere. What matters is that they can be used quickly. Every time. HeartSave ONE: The indispensable lifesaver Completely redesigned and specially developed for laypeople and first aiders so that they can provide life-saving treatment even more efficiently. The HeartSave ONE offers simple and intuitive operation with clear voice prompts and a metronome to pace chest compressions. Its reliability makes it a valued member of the HeartSave family.