Left main coronary artery disease is suspected from the ECG when we see-
1. ST elevation in aVR.
2. ST depression in leads I and II and in leads v4 to v6.
3. Sum of ST changes is 18 mm or more.
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#1 by Anthony Buxton at February 3rd, 2010
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Q. Why is there ST elevation in aVR with left main disease ?
#2 by drsanjeevsen at September 14th, 2010
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With LMCA occlusion, the entire LV is ischemic. The ECG vector is directed towards the aVR…..hence the ST elevation
#3 by deepak at October 31st, 2010
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axis is right and upper in LMCA- st elevation in aVR and V1, while there is ST dep in inferior leads.
#4 by Dr Jayachandran Thejus MD at November 12th, 2010
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Thank you!
#5 by nishant2402 at December 7th, 2010
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but st segment goes towards the current of injury. so it should be directed towards leads oriented to LV and as far as i know avr is not oriented to LV