This ECG is from a 66-year-old woman who called 911 for a complaint of chest pain for the past four hours.
The Lewis Lead is used to enhance our view of atrial activity, emphasizing P waves and flutter waves. Illustration by Dawn Altman. Free for use in educational setting. Contact Dawn for commercial use: [email protected]
This strip shows a junctional rhythm at a rate of 110 beats per minute. The QRS complexes are slightly wide at .10 seconds (100 ms), and they are within the parameters for supraventricular rhythm. The term, "junctional tachycardia" could be used, also, but this is not likely a "reentrant" junctional tachycardia, which would be fast, regular, and have a sudden onset. That type of junctional tachycardia is a PSVT. In this strip, we can see the underlying sinus rhythm in P waves that appear to pop up randomly.
This series of two ECGs was obtained from a 41-year-old woman who was brought to the Emergency Department and subsequently suffered cardiac arrest. ECG no. 1 is pre-arrest and ECG no.
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1924: Willem Einthoven wins the Nobel prize for inventing the electrocardiograph.
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