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Long PR interval

Non-Sustained Ventricular Tachycardia

Sat, 06/04/2016 - 14:02 -- Dawn

This ECG was obtained from a 45-year-old man who was experiencing palpitations and lightheadedness, which he originally attributed to anxiety. There are short, but frequent periods of ventricular tachycardia, which are self-limiting.  This is called "NON-SUSTAINED VENTRICULAR TACHYCARDIA".  The underlying rhythm is sinus, with a remarkably long PR interval, and at least one episode of failure of the P wave to conduct, making "second-degree AV block, Type II" a possibility. It is difficult to thoroughly evaluate the underlying rhythm because it is not seen very often in this ECG.

ECG Basics: Sinus Bradycardia With First-degree AV Block

Fri, 01/10/2014 - 15:52 -- Dawn

This is a nice teaching strip of a slowing sinus bradycardia that began around 40 bpm, and is slowing.  It is a good example of how the sinus node slows down - there is no abrupt change of rates, rather a change with each R-to-R interval.  There is also a first-degree AV block, reflecting slowing of conduction in the AV node.  The PR interval is slightly variable at .28 sec. to about .32 sec.

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