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ECG tutorial: Myocardial ischemia and infarction

INTRODUCTION

The electrocardiogram (ECG) is an important test used in the clinical evaluation of patients with suspected or known myocardial ischemia or myocardial infarction (MI). In order to recognize abnormalities that suggest ischemia or infarction, it is important to understand the components of a normal ECG. (See "ECG tutorial: Basic principles of ECG analysis".)

In patients with myocardial ischemia or infarction, findings on the ECG are influenced by multiple factors, including the following:

Duration – hyperacute/acute versus evolving/chronic

Size – amount of myocardium affected

Anatomic location – anterior, lateral, or inferior-posterior

                 

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Literature review current through: Nov 2014. | This topic last updated: Dec 11, 2014.
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