ECG 7 Step Ruler: A parent ID sized card making ECG interpretation easy. Suitable for anyone undertaking ECG/ EKG practise from a student up to an experienced clinicianSize: Perfect sized to fit in your ID card holder for easy storage and access, specifically designed with the 7 step ECG interpretation method in mind With a follow Follow a 7 Step Plan with reference points along the way for those hard to remember key points!1. Heart rate- This will provide a quick but approximate heart rate. 2. Rhythm- Assess whether the heart rate is regular or irregular 3. Axis- A quick reference for normal, left or right axis deviation. The arrows pointing up indicate a positive deflection & arrows pointing down indicate a negative deflection.4. PR interval- This gives you a reference of the PRI range in milliseconds. Also to the right side, are blocks you can measure the PRI. 5. QRS interval- As above this gives you the range of the QRS & QTc in milliseconds and again you can measure the QRS interval with the blocks.6. ST elevation/ depression- Place the straight back line along the isoelectric line to assess if there is either ST elevation or depression also there is a ruler so you can measure the degree of either in millimetres.7. T wave- Lastly, a quick reference for potential T wave abnormalities. Plus top right references the leads view of the heart which comes in handy when identifying the area of a myocardial infarction. Remember: V1-V4= Anteroseptal MI & V3-V6= Anterolateral MIColour:As ShownMaterial:plastic Package Contents:2PCS x ECG 7 Step Ruler With Card slot Only the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.