A 63 year old male presented with crushing chest pain. Prehospital BP was 70, but higher in the ED.
Here is the initial ECG at 1033 PM:
Although the ECG is subtle and many or most physicians will not recognize it, it is diagnostic of anterior STEMI. Nothing else has this morphology.
It is important to know that 40-50% of anterior STEMI have upward concavity of the ST segments on the initial ECG.(1, 2, 3)
1. Kosuge M. Am Ht J 1999; 137:522-7. 2. Smith SW. J Em Med 2006;31:69-77 3. Smith SW. Annals of EM 2012;60:45-56
The emergency physician knew that the patient was ill, but did not initially diagnose STEMI. He then noticed the STE in aVL, but not the anterior injury. He did not activate the cath lab immediately, but did immediately consult both an interventionalist and a general cardiologist. They did not see the STEMI, but agreed that this sounded serious and the cath lab was activated.
While waiting for the cath lab, this was recorded at 2303:
At cath, there was severe 3 vessel disease, with an ostial LAD occlusion that was opened. The patient underwent a balloon pump for cardiogenic shock.
Here is an EKG shortly after leaving the cath lab:
He went for CABG x 4.
Here is the initial ECG at 1033 PM:
Although the ECG is subtle and many or most physicians will not recognize it, it is diagnostic of anterior STEMI. Nothing else has this morphology.
It is important to know that 40-50% of anterior STEMI have upward concavity of the ST segments on the initial ECG.(1, 2, 3)
1. Kosuge M. Am Ht J 1999; 137:522-7. 2. Smith SW. J Em Med 2006;31:69-77 3. Smith SW. Annals of EM 2012;60:45-56
The emergency physician knew that the patient was ill, but did not initially diagnose STEMI. He then noticed the STE in aVL, but not the anterior injury. He did not activate the cath lab immediately, but did immediately consult both an interventionalist and a general cardiologist. They did not see the STEMI, but agreed that this sounded serious and the cath lab was activated.
While waiting for the cath lab, this was recorded at 2303:
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Here is an EKG shortly after leaving the cath lab:
I can happily inform you that by following your blog and EMS12lead (for the last three months) and by listening to Scott Weingart's podcast with you I "felt" that this was STEMI right from the get go. However, I mainly focused on the inferior leads and aVL and thought of high lateral STEMI (so I probably need to follow your blog this coming semester too, not that I mind). I expected STE in V5-V6 and STD in those leads initially confused me but soon raised the suspicion of anteroseptal engagement.
ReplyDeleteHowever I'm still somewhat confused about the STE-distribuition, how come we get high lateral STE with an LAD-occlusion?
Proximal LAD occlusion stops the flow in the diagonal arteries, especially the first diagonal to the high lateral wall.
DeleteSteve Smith
An Iphone app would be so great with your formulas and ratios for LBBB and early repol.
ReplyDeletewhy don't you write one??? that would be great.
DeleteSir, I notice in the first ECG there is "Rs" pattern in lead V1, and then RBBB appears, so is this "Rs" pattern a sign of RVH or is it an early sign of RBBB? And how can we distinguish them?
ReplyDeleteThe QRS duration is normal on the first one, so it is not BBB. Though it is consistent with RVH, I'm not sure RVH was actually present. Axis is 90 degrees and not to the right.
Delete