On October 5, 2021 and March 15, 2021, Abbott informed customers of an issue which may affect a subset of Assurity™ and Endurity™ pacemakers that include models: PM1152, PM1160, PM1172, PM1240, PM1272, PM2152, PM2160, PM2172, PM2240, PM2260, and PM2272. Abbott has identified a subset of devices potentially susceptible to this issue which is caused by intermittent incomplete mixing of epoxy during manufacture that may potentially allow moisture ingress into the pulse generator header.