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Jun 8, 2023, 5 tweets

1/ Time for #12LeadThursday!

What’s the axis and do you notice anything about the precordial leads?

2/ What do you see on ECG to identify extreme axis deviation?

Negative deflection in lead I + negative deflection in aVF = extreme axis deviation

3/ What about the precordial leads?

Do you notice dominant R waves, S waves, or T-wave inversions?

4/ Putting it together, what do these ECG findings suggest?

If you thought of RV hypertrophy, you’re right!

5/ Why do we see this electrical pattern on ECG?

Vector of ventricular depolarization with hypertrophied RV is moving towards leads V1 and V2 (+deflection) and away from V4-V6 ( - deflection)

Shout out to @DHayesMD for this awesome byte on RV dysfunctio

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