CPC A61N 1/36542 (2013.01) [A61N 1/3688 (2013.01); A61N 1/3756 (2013.01); A61N 1/36507 (2013.01); A61N 1/36535 (2013.01); A61N 1/36578 (2013.01); A61N 1/37217 (2013.01)] | 18 Claims |
1. A medical device, comprising:
a motion sensor configured to sense a motion signal;
a pulse generator configured to deliver ventricular pacing pulses; and
a control circuit configured to:
determine a first patient physical activity metric from the motion signal;
determine an actual ventricular rate based on a plurality of ventricular pacing pulses delivered by the pulse generator, each of the plurality of ventricular pacing pulses being delivered by the pulse generator in response to an atrioventricular pacing interval expiring;
determine that first pacing mode switching criteria are met based on the first patient physical activity metric and the actual ventricular rate by:
setting a threshold rate based on the actual ventricular rate;
determining a sensor indicated pacing rate based on the first patient physical activity metric; and
determining that the sensor indicated pacing rate is greater than the threshold rate set based on the actual ventricular rate; and
control the pulse generator to deliver ventricular pacing pulses according to a ventricular lower rate in response to the first pacing mode switching criteria being met.
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