Double speed is a non-standard setting where the ECG waves will appear twice as wide as normal. This is because the ECG is recorded at twice the normal ‘paper speed’. At this setting, the calibration signal at the start of the trace will be 10 small squares wide instead of the usual 5 squares.
It has been said that this setting can help to visualise difficult P waves, but all it really does is stretch out the same trace without adding any new information. Using this setting can also create confusion because none of the normal methods for calculating rate, segments or intervals will apply. A better solution to uncover difficult P waves might be to record a full 12 lead ECG (because P waves might be more clearly seen in other leads), or consider recording a Lewis Lead.
A 65 year old with chest pain, ECG recorded at 50 mm/sec
This ECG is from a man in his 60s who presented with sudden central chest pressure with nausea. He had a history of previous infarction 15 years ago. This was his second ECG, taken 35 min after the first.
This is a library of 2409 free, open access, re-usable ECGs from across the web.
Where did they come from?
These ECGs were collected from Free Open Access Medical Education (#FOAMed) blogs, with the permission of their authors. You can find out more about each ECG's source by clicking on it.
Why are they here?
This is an experiment in digital curation. The idea is to collect resources to increase awareness and accessibility. Over time, more ECGs in the collection will be tagged to make it easier to find them and reused in new interactive quizzes.
How can I use these ECGs?
You can use these ECGs for your own learning, teaching or research - as long as you abide by the terms of each ECG's copyright licence as stipulated by the original author.
Comments & Feedback
This ECG Archive is an academic, non-commercial #FOAMed project aiming to crowdsource a free open access database of ECGs and signs. If you include your personal details such as your name in your feedback you will be attributed for your contribution, unless you tell us that you don't want this to happen. Personal contact details such as email addresses will not be published but may be used to email you in reply. Full project details and participant information available here.