Medtronic is sponsoring the Micra AV Registry using the Micra AV system for continued surveillance of chronic atrioventricular synchronous pacing as intended, through the collection of data based on routine clinical care practice, following commercial release.

The Micra AV Registry is conducted within Medtronic's Product Surveillance Registry (PSR) platform.

The Micra AV Registry is a global, prospective, observational, multi-site registry. Patients enrolled in the Micra AV Registry will be prospectively followed for a minimum of 3 years post-implant or until registry closure, patient death, patient exit from the registry (i.e., withdrawal of consent).

Enrolled patients will have scheduled follow-up visits at least annually or as prompted by reportable adverse events; however, all Micra AV system follow-up patient visits are to be reported. Therefore, if more frequent scheduled visits occur per a provider's routine clinical care practice, those visits are reported. The total estimated registry duration is 4.5 years

Inclusion Criteria:

• Patient or legally authorized representative provides written authorization and/or consent per institution and geographical requirements
• Patient is intended to receive or be treated with a Micra AV Transcatheter Pacing System and must be enrolled prior to the implant procedure

Exclusion Criteria:

• Patient who is, or is expected to be inaccessible for follow-up
• Patient with exclusion criteria required by local law
• Patient is currently enrolled in or plans to enroll in any concurrent drug and/or device study that may confound results

Patients intended to be implanted with a Micra AV system are eligible for enrollment and all patients must be consented prior to the implant. As such, only geographies with regulatory approval for the Micra system are eligible to enroll patients (see locations section).

All patients enrolled and successfully implanted with a Micra AV system will be followed for a minimum of 3 years, unless a patient is exited from the registry due to an unavoidable reason. If a Micra AV system is not successfully implanted, patients will be exited from the registry unless a Micra AV System and/or implant procedure related event is identified, for which the patient will be followed until the event is resolved or no further actions need to be taken.