AUTOMATIC SELECTION OF STIMULATION CHAMBER FOR VENTRICULAR RESYNCHRONIZATION THERAPY

摘要

A method and apparatus for selection of one or more ventricular chambers to stimulate for ventricular resynchronization therapy. Intrinsic intracardia electrograms that include QRS complexes, are recorded from a left and right ventricle. A timing relationship between the intrinsic intracardia electrograms recorded from the left and right ventricle is then determined. In one embodiment, the timing relationship is determined using a delay between a left ventricular and a right ventricular sensed intrinsic ventricular depolarizations and a duration interval of one or more QRS complexes. In one embodiment, the duration of QRS complexes is determined from either intracardiac electrograms or from surface ECG recordings. One or more ventricular chambers in which to provide pacing pulses are then selected based on the timing relationship between intrinsic intracardia electrograms recorded from the right and left ventricle, and the duration of one or more QRS complexes.

主权项

1. An implantable cardiac device, comprising:
sensing circuitry for receiving cardiac signals from the right and left ventricles; pacing circuitry for delivering pacing pulses; a controller for controlling the operation of the pacing circuitry in accordance with a selected pacing mode: circuitry for determining a timing relationship between intrinsic ventricular depolarizations of the left and the right ventricles; and, circuitry for selecting between a right ventricular, left ventricular, or biventricular pacing mode by which to provide pacing pulses based on the timing relationship between intrinsic ventricular depolarizations of the left and the right ventricle, wherein the selected pacing mode determines the manner in which paces are delivered over multiple cardiac cycles.