Old Myocardial Infarction Ecg __hot__ Jun 2026

Left Bundle Branch Block (LBBB): Can create deep QS complexes in the right precordial leads that look like an anterior MI.

: T-waves may remain inverted or become upright and "flattened" over time. old myocardial infarction ecg

“Sinus rhythm, rate 72. Pathologic Q waves in leads II, III, and aVF (duration 44–56 ms) consistent with old inferior myocardial infarction . No acute ST-segment elevations. Fragmented QRS noted in III and aVF. Compared to prior ECG from [date], findings are unchanged.” Left Bundle Branch Block (LBBB): Can create deep

| Infarct location | Leads with pathologic Q waves | Coronary artery | Typical Q-wave morphology | |---|---|---|---| | | V2–V4 (may extend to V1–V5) | LAD | Loss of R wave progression; QR or QS in V2–V4 | | Inferior | II, III, aVF | RCA (80%) or LCx | Q ≥40 ms, often >1/3 of R in III, aVF | | Lateral | I, aVL, V5–V6 | LCx or diagonal | Narrow but deep Q; often subtle | | Posterior (old) | Tall R wave in V1–V2 (mirror of posterior Q) | RCA or LCx | R/S ratio >1 in V1-V2 with upright T wave (mirror test) | | Septal | V1–V2 | Septal perforators (LAD) | QS or QR; loss of small septal R | Pathologic Q waves in leads II, III, and