Method and apparatus for obtaining heartbeat measurements from a ECG waveform

A method of obtaining heartbeat measurements from an ECG waveform, said method comprising the steps of:

• detecting a plurality of heartbeats in said ECG waveform;
• classifying said plurality of heartbeats as dominant heartbeats and non-dominant heartbeats;
• aligning said dominant heartbeats to create aligned dominant heartbeats:
• creating a representative heartbeat from said plurality of aligned dominant heartbeats;
• obtaining measurements for said representative heartbeat, further comprising the steps of:
• obtaining a plurality of representative heartbeats corresponding to a plurality of ECG waveforms;
• measuring an earliest QRS onset, responsive to said obtaining step;
• measuring a latest QRS offset, responsive to said obtaining step;
• and
• for said representative heartbeat, determining a maximum R wave amplitude measurement between said earliest QRS onset and said latest QRS offset;
• determining a level of confidence of said maximum R wave amplitude measurement;
• and
• displaying an indication of said level of confidence.

A method of obtaining heartbeat measurements from an ECG waveform, said method comprising the steps of:

• detecting a plurality of heartbeats in said ECG waveform;
• classifying said plurality of heartbeats as dominant heartbeats and non-dominant heartbeats;
• aligning said dominant heartbeats to create aligned dominant heartbeats;
• creating a representative heartbeat from said plurality of aligned dominant heartbeats;
• obtaining measurements for said representative heartbeat, further comprising the steps of:
• obtaining a plurality of representative heartbeats corresponding to a plurality of ECG waveforms;
• measuring an earliest QRS onset, responsive to said obtaining step;
• measuring a latest QRS offset, responsive to said obtaining step;
• and
• for said representative heartbeat, determining a maximum R wave amplitude measurement between said earliest QRS onset and said latest QRS offset;
• for said representative heartbeat, determining an average ST level measurement;
• determining a level of confidence of said ST level measurement;
• and
• displaying an indication of said level of confidence.

A method of obtaining heartbeat measurements from an ECG waveform, said method comprising the steps of:

• detecting a plurality of heartbeats in said ECG waveform;
• classifying said plurality of heartbeats as dominant heartbeats and non-dominant heartbeats;
• aligning said dominant heartbeats to create aligned dominant heartbeats;
• creating a representative heartbeat from said plurality of aligned dominant heartbeats;
• obtaining measurements for said representative heartbeat, further comprising the steps of:
• obtaining a plurality of representative heartbeats corresponding to a plurality of ECG waveforms;
• measuring an earliest QRS onset, responsive to said obtaining step;
• measuring a latest QRS offset, responsive to said obtaining step;
• and
• for said representative heartbeat, determining a maximum R wave amplitude measurement between said earliest QRS onset and said latest QRS offset;
• and
• for said representative heartbeat, determining an isoelectric level by computing an average level for a predetermined amount of time prior to said earliest QRS onset.

A medical device for obtaining heartbeat measurements from an ECG waveform, comprising:

• detection logic for detecting a plurality of heartbeats in said ECG waveform;
• classification logic for classifying said plurality of heartbeats as dominant heartbeats and non-dominant heartbeats;
• alignment logic for aligning said dominant heartbeats to create aligned dominant heartbeats;
• representative heartbeat creation logic for creating a representative heartbeat from said plurality of aligned dominant heartbeats;
• measurement logic for obtaining measurements for said representative heartbeat, said measurement logic further comprising:
• means for obtaining a plurality of representative heartbeats corresponding to a plurality of ECG waveforms;
• means for measuring an earliest QRS onset, responsive to said obtaining means;
• means for measuring a latest QRS offset, responsive to said obtaining means;
• for said representative heartbeat, means for determining a maximum R wave amplitude measurement between said earliest QRS onset and said latest QRS offset;
• for said representative heartbeat, means for determining an average ST level measurement;
• and
• for said representative heartbeat, means for determining an ST slope measurement by using a best line fit between the latest QRS offset and an ST measurement point of said representative heartbeat.

A medical device for obtaining heartbeat measurements from an ECG waveform, comprising:

• detection logic for detecting a plurality of heartbeats in said ECG waveform;
• classification logic for classifying said plurality of heartbeats as dominant heartbeats and non-dominant heartbeats;
• alignment logic for aligning said dominant heartbeats to create aligned dominant heartbeats;
• representative heartbeat creation logic for creating a representative heartbeat from said plurality of aligned dominant heartbeats;
• measurement logic for obtaining measurements for said representative heartbeat, said measurement logic further comprising:
• means for obtaining a plurality of representative heartbeats corresponding to a plurality of ECG waveforms;
• means for measuring an earliest QRS onset, responsive to said obtaining means;
• means for measuring a latest QRS offset, responsive to said obtaining means;
• for said representative heartbeat, means for determining a maximum R wave amplitude measurement between said earliest QRS onset and said latest QRS offset;
• means for determining a level of confidence of said maximum R wave amplitude measurement;
• and
• means for displaying an indication of said level of confidence.

A medical device for obtaining heartbeat measurements from an ECG waveform, comprising:

• detection logic for detecting a plurality of heartbeats in said ECG waveform;
• classification logic for classifying said plurality of heartbeats as dominant heartbeats and non-dominant heartbeats;
• alignment logic for aligning said dominant heartbeats to create aligned dominant heartbeats;
• representative heartbeat creation logic for creating a representative heartbeat from said plurality of aligned dominant heartbeats;
• measurement logic for obtaining measurements for said representative heartbeat, said measurement logic further comprising:
• means for obtaining a plurality of representative heartbeats corresponding to a plurality of ECG waveforms;
• means for measuring an earliest QRS onset, responsive to said obtaining means;
• means for measuring a latest QRS offset, responsive to said obtaining means;
• for said representative heartbeat, means for determining a maximum R wave amplitude measurement between said earliest QRS onset and said latest QRS offset;
• for said representative heartbeat, means for determining an average ST level measurement;
• means for determining a level of confidence of said ST level measurement;
• and
• means for displaying an indication of said level of confidence.

A medical device for obtaining heartbeat measurements from an ECG waveform, comprising:

• detection logic for detecting a plurality of heartbeats in said ECG waveform;
• classification logic for classifying said plurality of heartbeats as dominant heartbeats and non-dominant heartbeats;
• alignment logic for aligning said dominant heartbeats to create aligned dominant heartbeats;
• representative heartbeat creation logic for creating a representative heartbeat from said plurality of aligned dominant heartbeats;
• measurement logic for obtaining measurements for said representative heartbeat, said measurement logic further comprising:
• means for obtaining a plurality of representative heartbeats corresponding to a plurality of ECG waveforms;
• means for measuring an earliest QRS onset, responsive to said obtaining means;
• means for measuring a latest QRS offset, responsive to said obtaining means;
• for said representative heartbeat, means for determining a maximum R wave amplitude measurement between said earliest QRS onset and said latest QRS offset;
• and
• for said representative heartbeat, means for determining an isoelectric level by computing an average level for a predetermined amount of time prior to said earliest QRS onset.