To refresh your memory here is the 12-lead ECG.
And for those of you who requested lead V4R.
This ECG meets all 3 of Sgarbossa's criteria to identify acute STEMI in the presence of left bundle branch block.
Keep in mind, it only has to meet one criterion in one lead!
(Please note: One criterion has been modified from its original form. Instead of discordant ST-elevation > 5 mm we are looking for discordant ST-elevation > 0.2 the depth of the S-wave. Credit to Dr. Smith of Dr. Smith's ECG Blog.)
Angiography revealed 100% occlusion of the LCX and 99% occlusion of the RCA.
Thanks to everyone who commented on the case!
AMI in the presence of LBBB - Sgarbossa's Criteria Part I