Patent ID: 7483741

Claim:
A cardiac rhythm management device, comprising: circuitry for controlling the delivery of paces to the right and left ventricles; circuitry for detecting senses indicating intrinsic activity in the right ventricle; circuitry for detecting a tachyarrhythmia when a time interval between successive right ventricular senses is below a specified tachyarrhythmia rate threshold interval; circuitry for pacing the right and left ventricles with a negative offset such that the left ventricular pace precedes the right ventricular pace by a negative offset interval, and wherein a pacing interval, defined as the interval between a right ventricular sense and a pace, is constrained by a specified maximum pacing rate to be no shorter than the specified tachyarrhythmia rate threshold interval; and, rendering the circuitry for detecting senses refractory for a post-sense refractory period after a right ventricular sense and for a post-pace refractory period after a right ventricular pace, wherein the post-pace refractory period is shorter than the post-sense refractory period.