Pace pulse detection in cardiac signals
AssigneeTexas Instruments Incorporated
InventorsNithin Jose, Anand Hariraj Udupa, Sachin Aithal, Raja Reddy Patukuri, Ashin Antony
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Abstract
Systems, apparatus, articles of manufacture, and methods are disclosed to detect a pace pulse in an electrocardiogram (ECG) signal. An example apparatus includes programmable circuitry configured to execute instructions to: identify a leading edge of a pulse in an input signal based on an amplitude change; identify a transition time of the leading edge of the pulse; validate the leading edge of the pulse based on the amplitude change and transition time; identify a trailing edge of the pulse; determine a width of the pulse between the leading edge and the trailing edge; and validate the pulse based on the width.
Claims20
An apparatus comprising:
- an electrocardiogram (ECG) circuit having an input and an output, the input of the ECG circuit adapted for attachment to a user, the ECG circuit configured to receive an ECG signal on the input of the ECG circuit, and transmit data related to validated pulses on the output of the ECG circuit;
- memory configured to include computer readable instructions;
- and
- programmable circuitry configured to execute the computer readable instructions to:
- identify a leading edge of a pulse in the ECG signal responsive to an amplitude change in the ECG signal;
- identify a transition time of the leading edge of the pulse;
- validate the leading edge of the pulse based on the amplitude change and the transition time;
- identify a trailing edge of the pulse;
- determine a width of the pulse between the leading edge and the trailing edge;
- validate the pulse based on the width of the pulse;
- transmit data related to the pulse after the pulse has been validated;
- and
- suspend identification of leading edges of subsequent pulses in the ECG signal during a time window after validating the pulse.
A method comprising:
- receiving a cardiac signal on an input of electrocardiogram (ECG) analog front end (AFE) circuitry;
- identifying a leading edge of a first pulse in the cardiac signal by comparing an amplitude change in the first pulse and a first threshold;
- identifying a trailing edge of the first pulse;
- determining a width of the first pulse between the leading edge and the trailing edge;
- validating the first pulse based on the width;
- transmitting data related to the validating of the first pulse on an output of the ECG AFE circuitry;
- and
- identifying a leading edge of a second pulse in the cardiac signal by comparing an amplitude change for the second pulse to a second threshold during a ringing window after the validation of the first pulse, wherein the second threshold leading edge is scaled relative to the first threshold.
An apparatus comprising:
- electrocardiogram (ECG) analog front end (AFE) circuitry having an input and an output;
- memory configured to store computer readable instructions;
- and
- processing circuitry coupled to the memory and configured to execute the computer readable instructions to:
- receive a cardiac signal on the input of the ECG AFE circuitry;
- identify a leading edge of a first pulse in the cardiac signal based on an amplitude change of the first pulse and a first threshold;
- identify a transition time of the leading edge of the first pulse;
- validate the leading edge of the first pulse based on the amplitude change of the first pulse and the transition time;
- identify a trailing edge of the first pulse;
- determine a width of the first pulse between the leading edge and the trailing edge;
- validate the first pulse based on the width;
- transmit data related to the first pulse on the output of the ECG AFE after validating the first pulse;
- and
- identifying a leading edge of a second pulse in the cardiac signal based on an amplitude change of the second pulse and a second threshold during a ringing window after validating the first pulse, wherein the second threshold is scaled relative to the first threshold.
Dependencies are inferred from the claim text.