Clear EKG Ruler - 94542
Cardio Meter
* EKG Ruler with Seconds Scale for PR, QRS, Cycle Length, Coupling, Escape & Parasystolic Intervals
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Clear EKG Ruler - 94542
Item #94542
Cardio Meter * EKG Ruler with Seconds Scale for PR, QRS, Cycle Length, Coupling, Escape & Parasystolic Intervals
MSRP: $1.99
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