Cardiac stimulating device

Surgery: light – thermal – and electrical application – Light – thermal – and electrical application – Electrical therapeutic systems

Reexamination Certificate

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Reexamination Certificate

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07047073

ABSTRACT:
An implantable cardiac stimulating device has a pacing circuit connected via an electrode lead system to a first electrode which stimulates and detects activity in the left ventricle, a second electrode to stimulate and detect activity in the right atrium, and to a third electrode to detect activity in the left atrium. Upon the occurrence of a paced or sensed depolarization of the right atrium, a first AV-delay is started. When the subsequent left atrial depolarization is detected, a new AV-interval is started that is optimized for the left side of the heart. Either the left ventricle only, or both ventricles, is paced at the optimized left side AV-interval.

REFERENCES:
patent: 4856524 (1989-08-01), Baker, Jr.
patent: 5571143 (1996-11-01), Hoegnelid et al.
patent: 5720768 (1998-02-01), Verboven-Nelissen
patent: 5871507 (1999-02-01), Obel et al.
patent: 0 494 487 (1992-07-01), None
patent: WO 99/55415 (1999-11-01), None
“Proposal of a Method for Automatic Optimization of Left Heart Atrioventricular Interval Applicable to DDD Pacemakers,” Chirife, PACE, vol. 18 (Jan. 1995) pp. 49-56.
Effects of Different Atrioventricular Intervals During Dual-Site Right Atrial Pacing on Left Atrial Mechanical Function, Ho et al. PACE, vol. 23, (Nov. 2000) pp. 1748-1751.

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