Figure 3. (A) Sinus rhythm with complete heart block and junctional rhythm. (B) No evidence of complete heart block, but sinus rhythm with second-degree AV block (Mobitz I) can be seen. (C) No evidence of complete heart block, but sinus rhythm with first-degree AV block with occasional premature ventricular complexes can be seen. (D) Captured three days after obtaining C revealing inferior-posterior STEMI.

AV: arteriovenous; STEMI: ST-segment elevation myocardial infarction