Easily measure PRI range in milliseconds with a dedicated block for precise readings. Suitable for anyone undertaking ECG-practise from a student up to an experienced clinician. 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. Utilize blocks to measure QRS interval accurately, within the specified milliseconds range. Quickly estimate heart rate for immediate assessment and monitoring purposes. Efficiently determine normal, left, or right axis deviation with clear positive and negative deflection indicators. Evaluate ST elevation or low elevation using straight lines along the isoelectric line, aided by millimeter measurements for accurate analysis. Description: Introducing the measuring ruler, a versatile tool for accurate cardiac measurements. With precise indicators for PR Interval, QRS Interval, heart rate, rhythm assessment, and axis deviation, this ruler simplifies ECG-interpretation. Its compact design fits perfectly in your ID card holder for convenient storage and quick access. Equipped with a 7-step interpretation method, the measuring ruler allows you to assess ST elevation, low elevation, and T wave abnormalities with ease. Simply place straight lines along the isoelectric line to determine the extent of abnormalities in millimeters. The ruler's cardiac lead-map provides valuable insights for identifying myocardial infarction areas – V1-V4 for Anteroseptal MI and V3-V6 for Anterolateral MI. Stay ahead in cardiac diagnostics with the measuring ruler – your go-to tool for accurate and efficient ECG-analysis. Item Name: Measuring Ruler Material: Plastic Features: Practical, Portable, Long Lasting, Durable Size Details: L: 8.6cm/3.39", W: 5.4cm/2.13" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: Style 1pc: 1 x Measuring Ruler or Style 2pcs: 2 x Measuring Rulers or Style 3pcs: 3 x Measuring Rulers or Style 1 Set: 1 x Measuring Ruler 1 x Blue Storage Box or Style 2 Sets: 2 x Measuring Ruler 2 x Blue Storage Box or Style 3 Sets: 3 x Measuring Ruler 3 x Blue Storage Box