Configurable Replacement Mechanism for Leadless Pacemaker System

Method for replacing an implanted medical device with an implantable medical replacement device, wherein a command signal is sent with a programming device to the implanted medical device to change an address of the medical device to a new address being different from an address of the replacement device to allow independent communication of the programming device with both the medical device and the replacement device, and wherein an activation command signal is sent with the programming device to the replacement device to activate the replacement device to assume a passive state in which the replacement device is configured to sense cardiac events of a heart of a patient, but is prevented from applying pacing pulses to the heart, and wherein after having activated the replacement device to assume said passive state, a further command signal is sent with the programming device to the replacement device to let the implanted replacement device apply pacing pulses to the heart for a pre-determined number of cardiac cycles, and wherein a suspension command signal is sent with the programming device to the new address of the implanted medical device to suspend application of pacing pulses of the implanted medical device to the heart for a predetermined number of cardiac cycles, and wherein a deactivation command signal is sent with the programming device to the new address of the medical device in case capture of the heart is detected by the implanted replacement device with respect to the pacing pulses applied by the replacement device, so that the implanted medical device is deactivated, and wherein an activation command signal is sent to the implanted replacement device with the programming device to activate the replacement device to start to apply pacing pulses to the heart.