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Left axis deviation

Left Bundle Branch Block

Tue, 01/17/2017 - 18:36 -- Dawn

This ECG was taken from an unknown patient.  It shows sinus tachycardia with left bundle branch block. The ECG criteria for left bundle branch block are: 

* Wide QRS (.12 seconds or greater)

* Negative QRS deflection in V1

* Positive QRS in Leads I and V6 

* Supraventricular rhythm

Previous Inferior Wall M.I. and Left Axis Deviaton

Fri, 01/17/2014 - 21:39 -- Dawn

If you are teaching frontal plane axis to your students, you will need to teach them HOW to determine the axis - usually beginning with the QRS axis and then adding the P and T waves.  But, you also need to teach them WHY we measure axis, to provide relevance to something that may seem challenging to beginners.  There are many ECG interpretations that rely heavily or are dependent upon the determination of the axis.  

jer5150's picture

Jason's Blog: ECG Challenge of the Week for July 8-15. Which lead do both of these ECGs share a “common-thread”?

 

Two more ECGs classified under the general heading:  “Tracing suggestive of   ____ ”.  I  like ECGs that strongly favor a very specific clinical disorder.

jer5150's picture

Jason's Blog: ECG Challenge of the Week for June 10-17. Why did the ventricular rate abruptly decrease?

 

From June 10, 2012:   As is the case with all practical blogs, I’m encouraging ECG Guru members to engage in active group participation.  Share your thoughts, observations, impressions, findings, and interpretations.  Feel free to compare notes with one another and pick each other’s brains.

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