Micra Atrial Tracking Using a Ventricular Accelerometer Study

Inclusion Criteria:

- Subject has been implanted with, or is expected to be implanted with a MicraTM TPS
(Model MC1VR01), with remaining device longevity of 6 years or more.

- Subject is ≥ 18 years old and as per required local law.

- Subject has atrioventricular (AV) block.

- Subject (and/or witness, as applicable per local regulations) provides signed and
dated authorization and/or consent per institution and local requirements.

- Subject is willing and able to comply with the protocol.

Exclusion Criteria:

- Subject is in atrial arrhythmia at the time of enrollment.

- Subject is currently enrolled or planning to participate in a potentially confounding
drug or device trial during the study. Co-enrollment in concurrent trials is only
allowed when documented pre-approval is obtained from the Medtronic study manager.

- Subject is pregnant (if required by local law, women of child-bearing potential must
undergo a pregnancy test within seven days prior to MARVEL study procedures).

- Subject meets any exclusion criteria required by local law (age or other).

Additional criteria for the MARVEL Evolve Sub-study:

Inclusion criteria:

• Subjects in the MARVEL Sub-Study have previously been enrolled in the MARVEL main study