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Sinus arrest

ECG Basics: Sinus Pause / Sinus Arrest

Thu, 12/12/2013 - 11:03 -- Dawn

This example of sinus arrest, also called sinus pause, shows a spontaneous return to sinus rhythm.  There are many mechanisms by which pauses can occur on the ECG. One concept for beginner students to grasp is that, if the pause contains the equivalent of regular R-to-R intervals, and the first complex after the pause is "on time",  we can expect that the sinus node kept firing, but did not penetrate the atria (exit block).

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