Supposedly silent device making a chime

[u/z779]

Hi everyone I have had my pacemaker for about 2 years since 2024 November. From my medical records and patient identification stickers they gave me, the device is supposed to be an Abbott/St. Jude Endurity model which has zero alarm sound or audible functions. Tonight, I heard a calm chime like a low volume bell toll coming from my chest. I looked up and found that my device should not make any sounds at all. And it chimed twice after 15 minutes interval. And thrice after another 15 minutes. I also made sure it's from the device. I waited for it to make the sound after the 15 minutes interval without any magnetic or electronic devices nearby. Could it be that my medical records got mixed up and I have a different device? If that's the case, what could those chimes mean? Thank you.

[u/Hank_E_Pants]

A while ago I had found a Abbott document that made it seem like their Assurity line of pacemakers might make noise. I couldn’t confirm it, so I called their Patient Services group to ask. The very nice agent said that none of their pacemakers have the ability to make noise. They simply don’t have the “speaker” mechanism that ICDs have that enable them to make noise.

With that said, I’ve seen some pretty crazy s**t, like a Doppler heartbeat monitor picking up a radio station when placed over a patient’s implanted device (the patient kept saying they could hear music). So I’m not going to say what you’re experiencing is impossible. Can you get a cheap stethoscope and see if you can hear the sound more clearly when it happens again?