EKG Heart Rate Calculator Ruler

The EKG Heart Rate Calculator Ruler is specifically design to help you determine patient’s heart rates and interval lengths on EKGs. This easy to carry ruler is a great tool for reading all EKGs. Normal values for the P wave, PR segment, QRS complex, QT interval, PR interval and QTC interval are given on the reverse side for comparison.

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