Atrial pacing and sensing in cardiac resynchronization therapy
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United States of America Patent
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-
Mar 2, 2004
Grant Date -
Mar 13, 2003
app pub date -
Sep 13, 2001
filing date -
Sep 13, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An implanted heart pacing device includes a right atrium electrode for sensing depolarization from the sino-atrial node when the device determines that the heart should proceed at a natural pulse rate and includes a left atrium electrode for providing an electrical stimulation to the left atrium when the device determines that the heart should not proceed at the natural pulse rate. One or more electrodes may also be located at one or more ventricular walls to provide electrical stimulation to the one or more ventricular walls subsequent to sensing in the right atrium or stimulating in the left atrium to resynchronize the ventricular contraction, such as for compensating for a bundle branch block. Stimulating the left atrium with a left atrium electrode when controlling the pulse rate of the heart allows the left atrium to contract early enough to avoid mitral valve closure resulting from left ventricular contraction.
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