Automated signal detection
Analysis → Locate Human ECG Complex Boundaries
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This places markers on the QRS segments. We only really care about the “qrs” markers. They need to sit right on top of the R peaks.
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Alternative automated signal detection
Instead of Analysis → Locate Human ECG Complex Boundaries, there are several other ways to get the peak detection.
Analysis → hemodynamics → ECG interval extraction
Analysis → HRV & RSA → this places markers on both respiratory and cardiac signal. However, this is often the least accurate
Inspect the signal for marker issues:
Markers missing
Duplicate markers
Incorrectly placed markers
Markers hiding behind other markers
If QRS markers are placed on the S dip
Biopac has detailed instructions here:
HOW CAN I MOVE QRS PEAK EVENT MARKS FROM THE BOTTOM OF S WAVES TO THE TOP OF R WAVES?