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Sunday, January 9, 2011

Is there ST elevation?



This 51 yo male complained of chest pain, then had a v fib arrest. He was resuscitated and brought to the ED where this ECG was recorded. He was in cardiogenic shock


There is tachycardia, and there is a wide complex. This wide complex tachycardia could easily be misdiagnosed as V tach. However, there are p-waves, and this is a classic RBBB + LAFB (left anterior fascicular block) morphology. When V tach originates in the left ventricle, there may be an RBBB-like complex, but because VT originates in the myocardium, not in the left bundle (as does RBBB), it does not look exactly like RBBB, as this one does. The left anterior fascicular block can be diagnosed by the left axis deviation. RBBB alone would have S-waves in I and aVL; since there are late large R-waves, there is LAFB.
So now we can say it is sinus tach with RBBB + LAFB
Is there ST elevation?
 

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