File:E0007532.jpg: Difference between revisions

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== Summary ==
{{Information
|Description = This is the same patient in the electrophysiology laboratory. A ventricular catheter is used to stimulate the ventricle and a right atrial (RA) catheter is used to record the atrial activity. The patient has been premedicated with digoxin 0.25mg/day. The tracing shows four surface leads and one intra cardiac recording.
Supraventricular tachycardia is induced with a train of ventricular beats and a final premature beat. Note that the last stimulated beat has a shorter pacing interval and results in a longer interval between it and the next RA deflection. This then sets off AVNRT with the RA activity now closely associated with the QRS.
The short-long interval between the initiating beat and the first QRS of the tachycardia is similar to that of the spontaneous tracing. The long interval suggest conduction down a slow anterograde pathway which is typical of AVNRT.
|Category = [[Case_reports_from_Michael_Rosengarten|Case reports by Michael Rosengarten]]
|Source = EKG World Encyclopedia http://cme.med.mcgill.ca/php/index.php , courtesy of Michael Rosengarten BEng, MD.McGill
|Date = 2012
|Author = Michael Rosengarten BEng, MD.McGill
|Permission = {{by-nc-sa-3.0}}
|other_versions = None
}}