A method for quantitative measurement of signal and analysis quality using the CA Recorder™ parameters Signal Not Analyzed and Beats Not Analyzed.
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Signal Not Analyzed (SNA)

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• Region with no beats counted due to large amounts of artifact or signal dropout
  
  

• No tick marks displayed for a period longer than 3 seconds
  
  
• Signal not analyzed is summated for each logging period

Beats Not Analyzed (BNA)

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• Counted as a beat, but does not meet criteria for valid analysis
   

• Beats not analyzed are indicated by single red tick mark
  
  

• Beats not analyzed are summated for each logging period

ITS High Quality Graphics

SNA and BNA Percentages

Quality Index (QI) of High Quality Data

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