Posterior MI: Difference between revisions
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{{ST elevation myocardial infarction}} | {{ST elevation myocardial infarction}} | ||
{{CMG}} | {{CMG}} | ||
{{SK}} true posterior MI | |||
{{SK}} posterior MI, true posterior MI | |||
==Overview== | ==Overview== |
Revision as of 20:53, 11 March 2014
ST Elevation Myocardial Infarction Microchapters |
Differentiating ST elevation myocardial infarction from other Diseases |
Diagnosis |
Treatment |
|
Case Studies |
Posterior MI On the Web |
Directions to Hospitals Treating ST elevation myocardial infarction |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Synonyms and keywords: posterior MI, true posterior MI
Overview
A posterior MI is a heart attack or cessation of blood flow to the heart muscle that involves the backside or posterior side of the heart. Rather than causing the traditional ST segment elevation characteristic of the electrocardiogram of many heart attacks (a "STEMI"), because the heart attack is on the opposite side of the heart, the ST segments are depressed in the anterior precordial leads rather than elevated.
Pathophysiology
A posterior MI is due to occlusion of the left circumflex artery.
EKG Examples of Posterior MI
Shown below is an EKG demonstrating changes during acute posterolateral MI depicting ST depression in precordial leads V2-V3.
Copyleft image obtained courtesy of, http://en.ecgpedia.org/wiki/Main_Page
Shown below is an EKG illustrating inferior-posterior myocardial infarction with complete AV block and ventricular escape rhythm with RBBB pattern and left axis, followed by sinus rhythm.
Copyleft image obtained courtesy of, http://en.ecgpedia.org/wiki/Main_Page
Shown below is an EKG demonstrating atrial fibrillation and inferior-posterior myocardial infarction.
Copyleft image obtained courtesy of, http://en.ecgpedia.org/wiki/Main_Page
Shown below is an EKG demonstrating inferior-posterior-lateral myocardial infarction with a nodal escape rhythm
Copyleft image obtained courtesy of, http://en.ecgpedia.org/wiki/Main_Page
Shown below is an EKG demonstrating atrial fibrillation with inferior-posterior-lateral myocardial infarction and incomplete right bundle branch block. Lead I shows ST depression, suggestive of right coronary artery involvement.
Copyleft image obtained courtesy of, http://en.ecgpedia.org/wiki/Main_Page
Shown below is an EKG demonstrating ST elevation in leads II, III and aVF and ST depression in leads V1, V2 and V3 depicting a posterior MI.