Information about the Tools
– This is where you can choose an ECG image file from your computer to start annotating. No copy of your file is saved on our servers. Note that these tools work better on larger screens and may not be effective on small devices.
Ruler: This is a rudimentary digital version of the traditional calipers. Drag the ruler across the ECG and resize by dragging the right edge. This can help you to determine if a rhythm is regular.
Calipers – this is an older version of the ruler / calipers above. Choose this tool, click on two different complexes, and it will march out markers at the same interval.
Baseline – This tool will draw a simple horizontal line when you click on the image. The idea is to help you measure elevated and depressed segments more easily.
Line – This tool will draw a simple vertical line when you click on the image. The idea is to help you track waveforms across multiple leads where they were recorded simultaneously.
Highlighter – This tool will draw a semi-transparent marker on the ECG. When you finish, it will auto-correct the marker to be a straight horizontal line. You can change the size or colour. Currently this tool will work in Chrome or Firefox, but not Edge or Internet Explorer.
Pen – This is a simple pen tool that you can use to scribble on the ECG. You can change the size or colour.
Text – This will stamp your custom text on the ECG. It can be used to make repetitive annotations, e.g. ‘P wave’ or ‘P’ across the ECG without having to type each one. You can change the size or colour.
Star – This will stamp a star on the ECG to highlight changes or similarities. It can be used to make repetitive annotations across the ECG. You can change the star size, colour or number of points.
Undo Redo Clear – These tools will allow you to experiment more freely as you can undo errors or clear all of the annotations.
Saving: You are free to download/save your annotated image and reuse it according to the terms of the image’s original copyright licence. No copy of your image will be stored on these servers. To save the finished ECG with your annotations, simply right click and save as for any normal image.
Rate Axis QTc These are simple widgets to assist you in learning to calculate the rate, axis and corrected QT interval by various methods.
These are simple, experimental tools that were created just for fun. If you have an idea for another tool that would make it easier for you to interpret or annotate ECGs, send an email to firstname.lastname@example.org. If you are reporting a bug, please include the name of your device and your browser (i.e. Chrome, Firefox, Internet Explorer, Edge).