Online Journal of Cardiology

EKG WORLD ENCYLOPEDIA Myocardial Infarction

OLJC Medical Teaching EKG Table of Contents Glossary MI Index -MI Cases Français - Español

Evolving Q-wave infarction with a paced rhythm.

I. There is a paced ventricular rhythm present. This makes interpretation difficult as it is hard to extrapolate ischemic changes from a paced rhythm.

But in this case there is obvioius ST elevation in leads V1-V4 showing acute anterior infarction.
(n.b. There are two tracings on this page ­ interpretation continues below)

Interpretation by Matthew Schumaecker

EKG recorded by Dr. M. Rosengarten, MUHC, 1998

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I.

II. This second tracing, taken several hours later, nicely illustrates the evolution of a Q-wave infarction.
Q waves in V1-V4 show the presence of evolving anterior infarction. Do not misinterpret the pacer spikes for R waves!

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