Boston scientific received information that this cardiac resynchronization therapy defibrillator (crt-d) system emitted beep tones due to a low out of range impedance measurement on the right atrial (ra) lead, measuring less than 200 ohms.It was noted that the ra lead impedances were stable around 400 ohms and there was only one out of range measurement.The patient's ra lead was a non-boston scientific product.Technical services (ts) discussed troubleshooting options.The physician will continue to monitor the patient and system.This crt-d system remains in service.No adverse patient effects were reported.
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