File:E269.jpg: Difference between revisions

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Description	This is an interesting EKG as it shows paced atrial rhythm with a bipolar atrial pacemaker. In this case the lead configuration is different that that shown in the x-ray as a second atrial lead was added in the right atrial appendage and the atrium paced in a bipolar mode between the tips of the two leads. This combination seems to have decreased the episodes of tachycardia with block. The pacemaker is set at 80/min. to prevent the tachycardia and note the variation in the size and polarity of the atrial pacing spikes. This is an indication of the limitation of the EKG machine to record pacemaker pacing spikes which are brief. Note the markers on the top of the tracing which fail to detect the pacer for each beat. A pacemaker spike is usually less then 0.5 ms (compare with the QRS which is more than 80ms) and it is even more difficult to record when it is bipolar as is the case here.
Category	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	Creative Commons Attribution Noncommercial Share-Alike License

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Camera manufacturer	HP
Camera model	HP Scanjet G3110
Date and time of data generation	23:31, 2 May 2009
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Software used	Adobe Photoshop CS5 Windows
File change date and time	05:31, 21 February 2012
Y and C positioning	Co-sited
Pair of black and white reference values	0 255 128 255 128 255
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Date and time of digitizing	23:31, 2 May 2009
Date metadata was last modified	13:31, 21 February 2012
Unique ID of original document	4856E29C11D40F15A9CCD45DD9942DDA
Copyright status	Copyright status not set

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+== Summary ==
+{{Information
+|Description = This is an interesting EKG as it shows paced atrial rhythm with a bipolar atrial pacemaker. In this case the lead configuration is different that that shown in the x-ray as a second atrial lead was added in the right atrial appendage and the atrium paced in a bipolar mode between the tips of the two leads. This combination seems to have decreased the episodes of tachycardia with block.
+The pacemaker is set at 80/min. to prevent the tachycardia and note the variation in the size and polarity of the atrial pacing spikes. This is an indication of the limitation of the EKG machine to record pacemaker pacing spikes which are brief. Note the markers on the top of the tracing which fail to detect the pacer for each beat. A pacemaker spike is usually less then 0.5 ms (compare with the QRS which is more than 80ms) and it is even more difficult to record when it is bipolar as is the case here.
+|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
+}}