Real-time detection of r-waves and methods therefor
AssigneeNuPulseCV, Inc.
InventorsDouglas Edward Ivers, Guruprasad Anapathur Giridharan, Nagarjuna Reddy Chinta
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Abstract
A drive unit system for operating a cardiac assist device is disclosed. The drive unit system may include an R-wave detection module that makes a speculative detection of an R-wave associated with a received electrocardiogram (ECG) signal of a patient's heart and a conservative detection of the R-wave. The drive unit system includes a drive unit that may be coupled to the cardiac assist device and may operate the cardiac assist device based on the speculative detection and the conservative detection.
Claims57
A drive unit system for operating a cardiac assist device, the drive unit system comprising:
- an R-wave detection module operative to:
- make a speculative detection of an R-wave associated with a received electrocardiogram (ECG) signal of a heart of a patient using a first R-wave detection threshold value;
- and
- make a conservative detection of the R-wave associated with the ECG signal using a second R-wave detection threshold value, wherein the second R-wave detection threshold value is greater than the first R-wave detection threshold value;
- and
- a drive unit operatively coupleable to the cardiac assist device, the drive unit operative to cause the cardiac assist device to alter aortic blood pressure relative to an unassisted aortic blood pressure based on the speculative detection and the conservative detection.
A drive unit system for operating a counterpulsation device, the drive unit system comprising:
- an R-wave detection module operative to:
- make a speculative detection of an R-wave associated with a received electrocardiogram (ECG) signal of a heart of a patient;
- and
- make a conservative detection of the R-wave associated with the ECG signal;
- and
- a drive unit operatively coupleable to the counterpulsation device, the drive unit operative to:
- operate the counterpulsation device based on the speculative detection and the conservative detection;
- and
- decrease the aortic blood pressure based on a deflation trigger, the deflation trigger being based on the speculative detection;
- and
- a filter module operative to convert the received ECG signals into a filtered ECG signal, the filter module at least one of:
- (1) configured to filter out frequencies that are not associated with an R-wave, or (2) including a bandpass filter, a weighting filter, or a wavelet filter.
A drive unit system for operating a counterpulsation device, the drive unit system comprising:
- an R-wave detection module configured to:
- make a speculative detection of an R-wave associated with a received electrocardiogram (ECG) signal of a heart of a patient;
- and
- make a conservative detection of the R-wave associated with the ECG signal;
- and
- a drive unit operatively coupleable to the counterpulsation device, the drive unit configured to:
- operate the counterpulsation device based on the speculative detection and the conservative detection;
- decrease the aortic blood pressure based on a deflation trigger, the deflation trigger being based on the speculative detection;
- and
- inflate a ballon pump based on a QS2 time interval.
A drive unit system for operating a counterpulsation device, the drive unit system comprising:
- an R-wave detection module configured to:
- make a speculative detection of an R-wave associated with a received electrocardiogram (ECG) signal of a heart of a patient;
- and
- make a conservative detection of the R-wave associated with the ECG signal;
- and
- a drive unit operatively coupleable to the counterpulsation device, the drive unit configured to:
- operate the counterpulsation device based on the speculative detection and the conservative detection;
- decrease the aortic blood pressure based on a deflation trigger, the deflation trigger being based on the speculative detection;
- and
- cause a balloon pump to be 50% deflated in about 100-120 ms of the deflation trigger and fully deflated in about 140-180 ms of the deflation trigger.
Dependencies are inferred from the claim text.