File:E0003148.jpg

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Original file(3,004 × 1,599 pixels, file size: 971 KB, MIME type: image/jpeg)

Summary

Description

This is an EKG rhythm and marker strip from a patient with a Medtronic model 7108 Minuet dual chamber pacemaker. The patient had intact A/V conduction, and with a long paced A/V interval, conducted paced atrial beats to the ventricle. The atrial pacing threshold was determined by pacing at a rate faster than the patient's own rate and decreasing the atrial pulse width until atrial capture was lost, and ventricular pacing occurred (the upper tracing).

In spite of returning the atrial pulse width back to the last successful value, ventricular pacing continued .

Slowing the pacing rate terminated ventricular pacing (the lower tracing) and ventricular pacing did not return when the pacing rate was speeded up again.

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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current23:36, 18 February 2012Thumbnail for version as of 23:36, 18 February 20123,004 × 1,599 (971 KB)DarrelC (talk | contribs)
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