URL：https://images.theconversation.com/files/564020/original/file-20231206-25-3nscgh.png?ixlib=rb-1.1.0&q=45&auto=format&w=1000&fit=clip
掲載元：https://sftimes.com/how-do-pacemakers-and-defibrillators-work-a-cardiologist-explains-how-they-interact-with-the-electrical-system-of-the-heart/
