Original file (3,004 × 1,599 pixels, file size: 4.47 MB, MIME type: image/jpeg)
This is an electrocardiogram from a 87 year old man with a history of atrial fibrillation. His medications were coumadin and Monopril. The cardiogram shows sinus rhythm with rate of about 50/min, and a marked first degree heart block with a pr interval of about 350ms.
The first complex on the left is a fusion between the patient's native QRS and the pacemaker spike (this is nomal operation) this is followed by a PVC. Note the small blip following the PVC is artifact and is not a failure to capture of the pacemaker. The pacemaker is working well as a VVI pacer set at 50/min. The large spikes suggest a unipolar lead.
EKG World Encyclopedia http://cme.med.mcgill.ca/php/index.php , courtesy of Michael Rosengarten BEng, MD.McGill
Michael Rosengarten BEng, MD.McGill
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|current||10:40, 21 February 2012||3,004 × 1,599 (4.47 MB)||DarrelC|