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== Summary ==
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{{Information
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|Description = This is a tracing with four surface leads and one intracavitary right atrial (RA) recording. The tracing began when the patient was in AVNRT. The rate of the tachycardia was 135/min . This rate is slower that the patient's initial rate. This may be due to the effect of digitalis. The digitalis could also explain the large ST segment changes, or these could be due to the tachycardia itself or ischemia.
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Note the ventricular pacing train is interrupted by a premature spontaneous or reentrant ventricular complex which fails to conduct in the retrograde direction and results in termination of the arrhythmia.
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|Category = [[Case_reports_from_Michael_Rosengarten|Case reports by Michael Rosengarten]]
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|Source = EKG World Encyclopedia http://cme.med.mcgill.ca/php/index.php , courtesy of Michael Rosengarten BEng, MD.McGill
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|Date = 2012
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|Author = Michael Rosengarten BEng, MD.McGill
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|Permission = {{by-nc-sa-3.0}}
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|other_versions = None
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}}

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