Sgarbossa revisited – MI in LBBB

25 Sep

wanted to revisit this useful tool for looking for MI’s in those hard to interpret EKGs with LBBB (left bundle branch block)

USEFUL BASICS (click through for the breakdown):

–you’re handed an EKG, and there’s a LBBB

–look for >=1mm concordant ST elevation
–look for ST depression in anterior leads (V1, V2, V3)

if you see these things, worry about an MI (>90% specific)



same as above, but also add this:

–look for discordant ST deviation

–if ST segment change is > 1/4th the amplitude of the R or S-wave, worry about an MI



–if you see discordant ST elevation >5mm in a paced rhythm, worry about an MI.



References: basics; modified; paced; picture


Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )


Connecting to %s

%d bloggers like this: