Patent ID: 11931590
Assignee: PACESETTER, INC.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 11:
12. The method of claim 1, wherein the implantable system also includes a ventricular leadless pacemaker (vLP) configured to be implanted in or on a ventricular chamber of the patient's heart, selectively deliver a pacing pulse to the ventricular chamber, and receive an implant-to-implant (i2i) message from the aLP, the method further comprising:
the aLP transmitting, each cardiac cycle, an i2i message to the vLP to inform the vLP of an intrinsic or paced atrial activation, to thereby enable the vLP to time its delivery of a ventricular pacing pulse to the ventricular chamber based on the intrinsic or paced atrial activation;
wherein the i2i message that the aLP transmits to the vLP includes a status bit that informs the vLP whether the aLP was able to successfully detect said ventricular activation itself from the sensed signal during one or more previous cardiac cycles; and

the vLP determining whether or not to transmit a further i2i message to the aLP based on the status bit included in the i2i message that the vLP receives from the aLP.