EKG specific calculators for Heart Rate, PR, QRS and QT intervals
Easy Heart Rate calculator with full readout of rate down to 30 beats per minute
EKG Axis determination diagram
Normal EKG values for P wave, PR interval, QRS duration, QT interval, QTC interval
Diagrammatic representation of the EKG complex with areas or segments labeled to help you recognize the intervals

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Item Weight: 0.16 ounce (View shipping rates and policies)

ASIN : B00CPBSQ12