PM 1250 and PM 2250 ZENEX; PM1282 and PM2282 ZENEX MRI These low voltage (LV) devices are implantable pacemaker pulse generators, intended to be permanently implanted in the body, that have a power supply and electronic circuits that produce a periodic electrical pulse to stimulate the heart. These devices are used as a substitute for the heart's intrinsic pacing system to correct both intermittent and continuous cardiac rhythm disorders.

New pacemaker firmware was developed to further mitigate the risk of unauthorized access to our pacemakers that utilize radio frequency (RF) communications.

Abbott sent an Important Cybersecurity Advisory dated August 28, 2017, to all affected customers to notify customers of the availability of the programmer software update and associated pacemaker firmware update. The notification material is in the form of a Physician Letter and Hospital Letter and will be delivered to physicians and hospitals with inventory in the US by overnight service. Customers with questions were instructed to contact their Abbott representative or the customers technical support hotline at 1-800-722-3774.