Amazon.com : EKG Ruler Horizontal Badge Card Tool - ECG and Electrocardiogram Ruler - Excellent Resource for EKG Techs, EMT, Cardiology Tech, Nurses, or Other Healthcare Professionals : Office Products
Amazon.com: R-CAT EKG Badge Card – Accurately Interpret ECG/EKG Rhythm Strips and 12 Lead EKG Without EKG Calipers – Reader is a Handy Badge Buddy for Nursing – Plus for Paramedic EMS