System providing ventricular pacing and biventricular coordination

A method comprising:

• obtaining actual timing intervals between cardiac events;
• computing a first indicated timing interval based at least on a most recent actual timing interval duration and a previous value of the first indicated timing interval;
• and
• providing pacing therapy, based on the first indicated timing interval, in which computing the first indicated timing interval is also based on a remotely user-programmable parameter that corresponds to a desired degree of paced beats vs. sensed beats.

A method comprising:

• obtaining actual timing intervals between cardiac events;
• computing a first indicated timing interval based at least on a most recent actual timing interval duration and a previous value of the first indicated timing interval;
• and
• providing pacing therapy, based on the first indicated timing interval, in which computing the first indicated timing interval is also based on a goal proportion of paced beats to sensed beats.

A method, comprising:

• obtaining V-V intervals between ventricular beats;
• computing a first indicated pacing interval based at least on a most recent V-V interval duration and a previous value of the first indicated pacing interval;
• and
• providing pacing therapy to first and second ventricles, based on the first indicated pacing interval.

A cardiac rhythm management system, comprising:

• a sensing circuit for sensing events;
• a controller, obtaining timing intervals between events and computing a first indicated timing interval based at least on a most recent actual timing interval duration and a previous value of the first indicated timing interval;
• a filter that computes the first indicated timing interval by weighting at least one of (1) the most recent timing interval duration, or (2) the previous value of the first indicated timing interval, based on whether the most recent actual timing interval is concluded by a paced beat or a sensed beat;
• and
• a therapy circuit, providing pacing therapy based on the first indicated timing interval.

A cardiac rhythm management system, comprising:

• a sensing circuit for sensing events;
• a controller, obtaining timing intervals between events and computing a first indicated timing interval based at least on a most recent actual timing interval duration and a previous value of the first indicated timing interval, and in which the first indicated timing interval is also based on a first parameter that corresponds to a desired proportion of paced ventricular beats to sensed ventricular beats;
• and
• a therapy circuit, providing pacing therapy based on the first indicated timing interval.

A cardiac rhythm management system, comprising:

• a sensing circuit for sensing events;
• a controller, obtaining timing intervals between events and computing a first indicated timing interval based at least on a most recent actual timing interval duration and a previous value of the first indicated timing interval, and in which the controller includes a goal proportion of paced ventricular beats to sensed ventricular beats, and the first indicated timing interval is also based on the goal;
• and
• a therapy circuit, providing pacing therapy based on the first indicated timing interval.

A cardiac rhythm management system, comprising:

• at least one ventricular sensing circuit;
• a controller, the controller including:
• an V-V interval timer, obtaining V-V intervals between successive events in at least one ventricle;
• a first register, for storing a first indicated pacing interval;
• and
• a filter, updating the first indicated pacing interval based on a most recent V-V interval provided by the VV interval timer and previous value of the first indicated pacing interval stored the first register;
• and
• a ventricular therapy circuit, providing pacing therapy to first and second ventricles based at least partially on the first indicated pacing interval.