Patent ID: 7778706

Claim:
An implantable device comprising: a processor; memory; and control logic configured to measure a P wave width (ΔP base) during a patient base state, an atrio-ventricular delay (DD base) during a patient base state, and an atrio-ventricular delay (DD active) during a patient active state, and configured to determine a patient base state PV delay (PV base) based on the P wave width (ΔP base) and a value of a parameter δ, wherein the value of the parameter δ depends on the P wave width (ΔP base), and configured to determine a patient active state PV delay (PV active) based at least in part on the atrio-ventricular delay (DD base) and the atrio-ventricular delay (DD active) wherein the atrio-ventricular delays extend from the end of a respective P wave to the beginning of a respective ventricular QRS complex or a point within a respective ventricular QRS complex.