Difference between revisions of "Pseudoinfarct pattern"

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(Created page with " {{CMG}} Pseudoinfarct Patterns: ==Simulation of an Anterior== ===Left Bundle Branch Block=== *LBBB can cause poor R wave progression. In the presence of LBBB, th...")
 
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Pseudoinfarct Patterns:
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==Simulation of an Anterior==
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'''Overview'''
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Different electrocardiographic abnormalities can mimic a heart attack or myocardial infarction.
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==Simulation of an Anterior Myocardial Infarction==
  
 
===Left Bundle Branch Block===
 
===Left Bundle Branch Block===

Latest revision as of 21:48, 29 October 2019

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]


Overview

Different electrocardiographic abnormalities can mimic a heart attack or myocardial infarction.

Simulation of an Anterior Myocardial Infarction

Left Bundle Branch Block

  • LBBB can cause poor R wave progression. In the presence of LBBB, there is often a decrease in the amplitude of R waves to the mid precordium in the absence of a septal infarct.
  • QS complexes are often seen in the right precordial leads in uncomplicated LBBB, and they may even extend as far out as V5 or V6.
  • Non infarctional Q waves may be seen in aVL.
  • The electrical basis for the appearance of q waves is that LBBB] causes a loss of the normal septal R waves in the right precordial leads. The septum is no longer being depolarized from left to right as it normally does because of the delay in conduction down the left bundle. Therefore, there is a loss of the early R wave.
  • There can occasionally be Rs complexes in V1. These unanticipated initial positive forces are due to early RV depolarization and may actually mask the q waves (i.e. loss of initial septal forces) that accompany an anteroseptal MI.

Poor R Wave Progression

Poor R wave progression can mimic an anterior myocardial infarction.


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