Method and system for stimulating a heart of a patient
First Claim
1. A cardiac stimulator comprising:
- a data collection module configured to obtain at least one left atrial pressure (LAP) signal representing cardiac behavior over a cardiac cycle of a heart, from a left atrial pressure sensor;
a stimulation pulse generator module configured to generate and emit stimulation pulses with a timing between successive pulses that implements at least one of an AV delay and VV delay;
an LAP signal processing module in communication with said data collection module, said LAP signal processing module being configured to identify an A-wave of the heart using the LAP signal, and to determine a maximum positive rate of change of the A-wave; and
a parameter setting adjusting module in communication with said LAP signal processing module, said parameter setting adjusting module being configured to adjust said at least one of said AV delay and said VV delay to produce a reduction of said maximum positive rate of change of the A-wave.
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Accused Products
Abstract
In an implantable medical device and a method for stimulating a heart of a patient, at least one left atrial pressure (LAP) signal over a cardiac cycle is obtained. The A-wave is identified using the LAP signal and a maximum positive rate of change of the A-wave of the LAP signal is determined. The maximum positive rate of change of the A-wave corresponds to the rate which the pressure in the atrium raises as the atria contraction forces more blood into the ventricle during the very last stage of diastole. Further, AV and/or VV delay is adjusted in response to the maximum positive rate of change of the A-wave, wherein a reduction of the maximum positive rate of change of the A-wave indicates an AV and/or VV delay providing an enhanced hemodynamic performance.
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Citations
13 Claims
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1. A cardiac stimulator comprising:
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a data collection module configured to obtain at least one left atrial pressure (LAP) signal representing cardiac behavior over a cardiac cycle of a heart, from a left atrial pressure sensor; a stimulation pulse generator module configured to generate and emit stimulation pulses with a timing between successive pulses that implements at least one of an AV delay and VV delay; an LAP signal processing module in communication with said data collection module, said LAP signal processing module being configured to identify an A-wave of the heart using the LAP signal, and to determine a maximum positive rate of change of the A-wave; and a parameter setting adjusting module in communication with said LAP signal processing module, said parameter setting adjusting module being configured to adjust said at least one of said AV delay and said VV delay to produce a reduction of said maximum positive rate of change of the A-wave. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification