Start: Beginning of QRS complex (easy β first deflection from baseline) End: Draw a tangent line along the steepest part of the T-wave downslope. Where this tangent intersects the baseline = end of QT. "Ignore the tail" β Do NOT include U-waves or any deflection after the tangent-baseline crossing. Tip: Use lead II or V5 for clearest T-wave morphology.
Review Auto-Detection
1. Calibrate
2. QRS
3. QT
4. R-R
Step 1: Calibrate
Tap the left edge then right edge of ONE large box (= 200 ms) or the standardization calibration pulse.
π Pinch or use buttons to zoom in for accurate placement, then tap to place markers
Calibrationβ
QRS Durationβ
Absolute QTβ
QRS-Adjusted QTβ
R-R Interval β HRβ
Bazett QTcβ
Fridericia QTcβ
Hodges QTcβ
Interpretationβ
Each time you complete a manual measurement (all 4 steps), the auto-detect algorithm learns from your markers.
The more ECGs you measure manually, the better auto-detect becomes.
Training: Image 1 of 1
For each image: Calibrate (Step 1) β Mark QRS β Mark QT β Mark R-R β Next Image