Detection and treatment of prolonged inter-atrial delay in cardiac resynchronization patients
OwnerYinghong Yu, Jiang Ding +1inventors
InventorsYinghong Yu, Jiang Ding, Milton Morris
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Abstract
A method and system for identifying and assessing inter-atrial conduction delays in patients is disclosed. Patients who are so identified and are also in need of ventricular resynchronization therapy may then be treated with left atrial pacing and ventricular resynchronization pacing. Certain patients may alternatively be treated with ventricular resynchronization therapy delivered with a conservatively selected atrio-ventricular delay interval and without left atrial pacing.
Claims20
A method for delivering cardiac resynchronization therapy to a patient, comprising:
- measuring the interval from a left atrial sense to a left ventricular sense during an intrinsic or right atrial paced cardiac cycle, designated as the LA-LV interval;
- comparing the LA-LV interval to a specified threshold Th1 and identifying the patient as having a prolonged inter-atrial delay if the LA-LV interval is less than the threshold Th1;
- and,
- adjusting the manner in which the cardiac resynchronization therapy is delivered to compensate for the prolonged inter-atrial delay.
The method of claim I wherein the LA-LV interval is measured during implantation of a left ventricular lead.
A system for setting optimal pacing parameters for delivering cardiac resynchronization therapy in a biventricular pacing mode to a patient, comprising:
- an implantable cardiac rhythm management device for delivering biventricular pacing, wherein the device is programmed to deliver right and left ventricular paces separated by specified biventricular offset interval BVO and in an atrial tracking or AV sequential mode so that the ventricular paces are delivered at an atrio-ventricular delay interval AVD following an atrial event;
- means for measuring the time interval between a left atrial contraction and a left ventricular contraction in the patient, designated as the LA-LV interval;
- means for comparing the LA-LV interval to a specified threshold Th1 and identifying the patient as having a prolonged inter-atrial delay if the LA-LV interval is less than the threshold Th1;
- and,
- means for adjusting the manner in which the cardiac resynchronization therapy is delivered to compensate for the prolonged inter-atrial delay.
Dependencies are inferred from the claim text.