ICD Warning Sounds

Posts from Jan. 1, 2018 to the present. Plus important announcements. (ICD warning sounds)

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ICD Warning Sounds

Post by icdadmin » September 18th, 2009, 6:17 pm

This first part is from Medtronic:
As posted earlier (Thanks FC and Hugo!!) , I thought this would be great for everyone that has a Medtronic ICD to know what the tones sound like: I am also contacting the other ICD manufactures and asking for the same tones. hang tight, we will get them all up here.


"Steady tone at one fixed pitch: Everything is OK. Let me repeat: everything is OK. A magnetic field must have been momentarily detected by your ICD. The tone will last for 30 seconds (older devices) or 10 or 20 seconds (newer devices). Every time you re-enter the magnetic field the alarm will re-sound. During the time your ICD is in the magnetic field, it is disabled (shocks turned off). When your ICD leaves the field, everything returns to normal (if you are no longer hearing the alarm, you have left the field). The purpose of this ICD feature is two-fold. First, if for some reason it was decided to shut off your ICD briefly - a common reason is if you are having some other surgery or procedure, then this tone would let them know that when they place a magnet over the ICD they have indeed disabled the ICD. Second, it is a way to check that the ICD is OK without having to go to the clinic - this feature is being used for checking the Marquis devices that are affected by the battery recall. They typically also try to hear this all OK tone after a surgery or procedure in order to verify that their equipment didn't damage your ICD."


"Alternating High/Low or On/Off tones: Your ICD has detected an alert condition (low battery, abnormal lead impedance, electrical reset condition, etc.) This tone will last for 30 seconds (older models) or 10 or 20 seconds (newer models). You should contact your physician if you hear this tone. In the vast majority of cases this is not an emergency or life threatening condition - but it is important to find out what is going on. The alternating tone alarm will never go off just once. It will go off regularly at consistent intervals until the ICD is interrogated at the clinic and the condition that triggered it is resolved in some way. Most commonly the alarm will go off daily at the exact same time each day. This time is programmable and they likely told you when it would be or maybe even let you select it when they set up your device."

Boston Scientific sound Boston Scientific's. Note, for a low battery, there are 16 beats every 6 hours.