Method and apparatus for optimizing cardiac pumping performance
First Claim
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1. A cardiac device, comprising:
- a first stimulation channel configurable for stimulating the right or left ventricle;
a controller for controlling the delivery of stimulus pulses through the stimulation channels in accordance with a programmed mode;
right and left ventricular accelerometers configurable for sensing mechanical contraction of the right ventricular septal wall and left ventricular free wall, respectively; and
wherein the controller is programmed to measure the time interval between contractions of the right ventricular septal wall and left ventricular free wall as sensed by the accelerometers during a cardiac cycle.
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Abstract
A cardiac rhythm and function management device configured to automatically adjust stimulation parameters used in delivering cardiac resynchronization therapy. Mechanical contraction intervals are measured using appropriately placed accelerometers and compared with optimum values. The stimulation parameters can then be adjusted accordingly in a manner that moves the mechanical contraction intervals toward their optimum values.
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Citations
18 Claims
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1. A cardiac device, comprising:
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a first stimulation channel configurable for stimulating the right or left ventricle;
a controller for controlling the delivery of stimulus pulses through the stimulation channels in accordance with a programmed mode;
right and left ventricular accelerometers configurable for sensing mechanical contraction of the right ventricular septal wall and left ventricular free wall, respectively; and
wherein the controller is programmed to measure the time interval between contractions of the right ventricular septal wall and left ventricular free wall as sensed by the accelerometers during a cardiac cycle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for operating a cardiac device, comprising:
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delivering stimulus pulses to the right or left ventricle in accordance with a programmed mode;
sensing mechanical contraction of the right ventricular septal wall and left ventricular free wall; and
measuring the time interval between contractions of the right ventricular septal wall and left ventricular free wall during a cardiac cycle. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification