Ventricular sensing control in a cardiac pacing system

A method comprising:

• generating ventricular pacing pulses;
• sensing a first cardiac electrical signal;
• applying an R-wave sensing threshold amplitude to the first cardiac electrical signal;
• applying a post-atrial ventricular blanking period to the first cardiac electrical signal;
• generating sensed event signals in response to R-wave sensing threshold crossings by the first cardiac electrical signal that occur outside the post-atrial ventricular blanking period;
• determining one or more event times each associated with an R-wave sensing threshold crossing by the first cardiac electrical signal;
• based on the one or more event times, controlling the post-atrial ventricular blanking period that is applied to the first cardiac electrical signal;
• and
• based on the sensed event signals, controlling the delivery of the ventricular pacing pulses.

A non-transitory, computer-readable medium storing a set of instructions that, when executed by control circuitry of a medical device, cause the medical device to:

• sense a cardiac electrical signal;
• apply an R-wave sensing threshold amplitude to the cardiac electrical signal;
• apply a post-atrial ventricular blanking period to the cardiac electrical signal;
• generate sensed event signals in response to R-wave sensing threshold crossings by the cardiac electrical signal that occur outside the post-atrial ventricular blanking period;
• determine one or more event times each associated with an R-wave sensing threshold crossing by the cardiac electrical signal;
• based on the one or more event times, control the post-atrial ventricular blanking period that is applied to the cardiac electrical signal;
• and
• based on the sensed event signals, control delivery of ventricular pacing pulses.