A-V synchronous interval pacing

Abstract

An implantable medical system can provide atrioventricular synchronous pacing using an interventricular septum. The system can include a ventricular electrode coupled to an intracardiac housing or a first medical lead implantable in an interventricular septum of a patient's heart to deliver cardiac therapy to or sense electrical activity of a left ventricle of the patient's heart, and a right atrial electrode coupled to a small lead or a second medical lead to deliver cardiac therapy to or sense electrical activity of a right atrium of the patient's heart. A right ventricular electrode can be coupled to the intracardiac housing or the first medical lead and implantable in the interventricular septum of the patient's heart to deliver cardiac therapy to or sense electrical activity of a right ventricle of the patient's heart.

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