Systems and methods for assessing ecg lead signal quality

A patient-specific heartbeat template library, comprising:

• at least one memory storing instructions;
• and
• at least one processor operatively connected to the at least one memory, and configured to execute the instructions to perform operations, including:
• receiving an extracted portion of a signal of electrocardiogram (ECG) data captured from a patient by an ECG lead, the extracted portion corresponding to a heartbeat;
• identifying a patient-specific heartbeat template stored in the at least one memory that is most likely to correspond to the identified heartbeat;
• and
• outputting the identified patient-specific heartbeat template.

A system for determining relative signal quality between electrocardiogram (ECG) leads, comprising:

• at least one memory storing instructions;
• and
• at least one processor operatively connected to the at least one memory, and configured to execute the instructions to perform operations, including:
• obtaining ECG data that includes a respective signal captured from a patient by each lead of a plurality of ECG leads;
• identifying a heartbeat in the ECG data based on detection of a peak in the ECG data;
• for each lead:
• extracting a portion of the respective signal corresponding to the identified heartbeat;
• identifying a heartbeat template most likely to correspond to the identified heartbeat, by:
• accessing a patient-specific heartbeat template library;
• and
• comparing the extracted portion of the respective signal with any patient-specific heartbeat templates stored in the patient-specific heartbeat template library for the lead;
• and
• determining respective noise data for the extracted portion of the respective signal, by:
• removing a respective QRS complex from the extracted portion of the respective signal to form a respective signal remainder;
• obtaining a heartbeat template remainder in the form of the identified heartbeat template with a respective QRS complex removed;
• determining the respective noise data for the extracted portion of the respective signal based on a comparison between the respective signal remainder and the heartbeat template remainder;
• and
• determining a signal-to-noise ratio for the lead based on the respective noise data;
• and
• determining a lead from amongst the plurality of ECG leads having a highest signal-to-noise ratio.