Thursday, January 22, 2015

ECG Blog #104 (My ECG Guru Comments-2) - AV Blocks/AV Dissociation

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As a source of tracings for practice and/or teaching — I have decided to LINK many of the ECGs I have commented on as Contributing Expert for ECG Guru (www.ecgguru.com)
  • NOTE: The ECG Guru is dedicated to providing free resources for ECG Teachers and their StudentsSearch the ECG Guru site if you ever are in need of cases on a particular subject.
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Regarding My Comments on the ECG Guru:
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ECG for Comment #828  on the ECG Guru (Instructor Collection — posted 9/16/2014):
This ECG was obtained from an 84-year old man who became dizzy and fell. He was not injured in the fall. Subsequent ECGs showed progressive slowing that clearly required insertion of a pacemaker.
  • How would you interpret this 12-lead ECG — given that this 84-year old man presented with syncope?
  • Is there complete AV Block?
  • Is there complete AV Dissociation? Are you certain?
  • What happens at the end of this 12-lead ECG?
Figure-1: ECG obtained from an 84-year old man admitted for syncope. (Our gratitude to Sebastian Garay for use of this case and all tracings.).
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ECG for Comment #836  on the ECG Guru (Instructor Collection — posted 11/4/2014):
This ECG was obtained from an 62-year old man. Unfortunately, there is no clinical information available.
  • How would you interpret this 12-lead ECG and long lead II rhythm strip? 
  • Can you explain why the rhythm is irregular? (HINT — Why did I place this tracing with my ECG Guru Comments about AV block?)
  • Can you explain the change in QRS morphology?
Figure-1: ECG obtained from an 62-year old man.  No history available ...
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